:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --text: #111827;
  --muted: #667085;
  --subtle: #94a3b8;
  --border: #e2e8f0;
  --line: #e2e8f0;
  --border-strong: #cbd5e1;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: #eff6ff;
  --danger: #dc2626;
  --danger-soft: #fff1f2;
  --success: #16a34a;
  --success-soft: #f0fdf4;
  --warning: #d97706;
  --warning-soft: #fffbeb;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 10px 26px rgba(15, 23, 42, 0.05);
  --radius: 20px;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 18% -10%, rgba(37, 99, 235, 0.10), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, #f4f7fb 36%, #eef3f9 100%);
  color: var(--text);
}

button, input, select, textarea { font: inherit; }
button {
  border: 0;
  background: var(--primary);
  color: #fff;
  min-height: 42px;
  padding: 10px 16px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 800;
  letter-spacing: .01em;
  box-shadow: 0 8px 18px rgba(37, 99, 235, .18);
  transition: background .15s ease, transform .15s ease, box-shadow .15s ease;
}
button:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 12px 24px rgba(37, 99, 235, .22); }
button:disabled { opacity: .48; cursor: not-allowed; transform: none; box-shadow: none; }
button.ghost { background: var(--primary-soft); color: var(--primary); box-shadow: none; }
button.ghost:hover { background: #dbeafe; box-shadow: none; }
button.danger { background: var(--danger); box-shadow: 0 8px 18px rgba(220, 38, 38, .16); }
button.danger.ghost { color: var(--danger); background: var(--danger-soft); box-shadow: none; }

input, select, textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  background: #fff;
  color: var(--text);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .10);
}
textarea { min-height: 180px; resize: vertical; }

.app-shell { display: grid; grid-template-columns: 280px 1fr; min-height: 100vh; }
.sidebar {
  background: linear-gradient(180deg, #0f172a 0%, #111827 100%);
  color: #fff;
  padding: 22px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  border-right: 1px solid rgba(255,255,255,.06);
}
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 26px; }
.mobile-menu-btn { display: none; }
.brand-icon {
  width: 48px; height: 48px; display: grid; place-items: center;
  border-radius: 16px; background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  font-weight: 900; font-size: 23px; box-shadow: 0 12px 30px rgba(37, 99, 235, .28);
}
.brand h1 { margin: 0; font-size: 21px; letter-spacing: .02em; }
.nav { display: grid; gap: 10px; }
.nav-btn {
  width: 100%; text-align: left; background: transparent; color: #cbd5e1;
  border: 1px solid rgba(255,255,255,.08); box-shadow: none;
}
.nav-btn:hover, .nav-btn.active {
  background: rgba(37, 99, 235, .24); color: #fff; border-color: rgba(96, 165, 250, .38); box-shadow: none;
}
.side-card {
  margin-top: 24px; padding: 16px; border-radius: 18px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.10);
}
.mini-stat { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.09); }
.mini-stat:last-child { border-bottom: 0; }
.mini-stat span { color: #cbd5e1; }
.mini-stat strong { font-size: 18px; }
.account-card { display: grid; gap: 10px; }
.bank-switcher { display: grid; gap: 8px; }
.bank-switcher label, .bank-manager-grid label { display: grid; gap: 6px; font-size: 12px; font-weight: 800; }
.bank-switcher p { margin: 0; color: #cbd5e1; font-size: 12px; }
.bank-manager-grid {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) minmax(220px, 1fr) auto;
  gap: 14px;
  align-items: end;
}
.account-card label { display: grid; gap: 6px; color: #cbd5e1; font-size: 12px; font-weight: 800; }
.account-card input, .account-card select { min-height: 40px; }
.account-card button { width: 100%; }
.account-card p { margin: 0; color: #cbd5e1; font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.account-card .config-hint { color: #fde68a; }
.account-card .inline-check { display: flex; align-items: center; gap: 8px; }
.account-card .inline-check input { min-height: auto; width: auto; }
.is-loading button { cursor: progress; }

.main { padding: 28px; min-width: 0; }
.topbar {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 18px;
  margin-bottom: 22px;
}
.topbar h2 { margin: 0; font-size: 30px; line-height: 1.2; }
.topbar p { margin: 8px 0 0; color: var(--muted); }
.top-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: rgba(255,255,255,.94);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 22px;
  margin-bottom: 18px;
  backdrop-filter: blur(6px);
}
.card > h3, .exam-setup h3 { margin-top: 0; }

.toolbar {
  display: grid;
  grid-template-columns: minmax(130px, .8fr) minmax(160px, 1fr) minmax(130px, .7fr) minmax(130px, .7fr) minmax(200px, 1.25fr) auto;
  gap: 14px;
  align-items: end;
}
.toolbar label, .form-grid label {
  color: var(--muted); font-size: 13px; display: grid; gap: 7px; font-weight: 800;
}
.toolbar button { height: 44px; }

.question-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 18px; }
.question-meta { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); margin-bottom: 12px; }
.question-meta span, .pill, .tag {
  padding: 5px 10px; border-radius: 999px; background: #eef2ff; color: #3730a3; font-size: 12px; font-weight: 900;
}
.question-card h3, .exam-running h3 { font-size: 21px; line-height: 1.58; margin: 10px 0 18px; }
.question-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 0 0 18px;
}
.question-images.inline { margin: 10px 0; }
.question-images figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}
.question-images img {
  display: block;
  width: 100%;
  max-height: 420px;
  object-fit: contain;
}
.question-image-preview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.question-image-thumb {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: #fff;
  display: grid;
  gap: 8px;
}
.question-image-thumb img {
  width: 100%;
  max-height: 160px;
  object-fit: contain;
}
.option-edit-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(180px, .8fr);
  gap: 10px;
  align-items: start;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}
.option-edit-row .option-image-preview {
  grid-column: 1 / -1;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
}
.option-format-hint {
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  color: #475569;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  font-size: 12px;
  line-height: 1.55;
}
.option-script-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.option-script-btn,
.text-script-btn {
  min-height: 28px;
  padding: 4px 9px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 800;
}
.option-image-preview .question-image-thumb img {
  max-height: 120px;
}
.option-image-preview p {
  margin: 0;
}
.options { display: grid; gap: 10px; }
.option {
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 14px 15px;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  cursor: pointer;
  background: #fff;
  line-height: 1.55;
  transition: background .15s ease, border-color .15s ease, transform .15s ease;
}
.option:hover { border-color: #93c5fd; background: #fbfdff; }
.option.selected { border-color: var(--primary); background: var(--primary-soft); }
.option.correct { border-color: #86efac; background: var(--success-soft); }
.option.partial { border-color: #fde68a; background: var(--warning-soft); }
.option.wrong { border-color: #fecdd3; background: var(--danger-soft); }
.option-key { font-weight: 900; color: var(--primary); }
.option-key {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: #fff;
}
.option.selected .option-key { color: #fff; background: var(--primary); border-color: var(--primary); }
.option.correct .option-key { color: #fff; background: var(--success); border-color: var(--success); }
.option.partial .option-key { color: #fff; background: var(--warning); border-color: var(--warning); }
.option.wrong .option-key { color: #fff; background: var(--danger); border-color: var(--danger); }
.option-body {
  min-width: 0;
  display: grid;
  gap: 8px;
}
.option-body .question-images {
  grid-template-columns: repeat(auto-fit, minmax(120px, 220px));
  margin: 6px 0 0;
}
.option-body .question-images img {
  max-height: 220px;
}
.answer-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.exam-running > .answer-actions {
  grid-template-columns: repeat(4, minmax(120px, 160px));
  justify-content: center;
  max-width: 676px;
  margin-inline: auto;
}
.answer-panel { margin-top: 16px; padding: 16px; border-radius: 14px; background: #f8fafc; border: 1px solid var(--border); line-height: 1.7; }
.explanation-text {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.answer-panel.correct { border-color: #86efac; background: var(--success-soft); }
.answer-panel.partial { border-color: #fde68a; background: var(--warning-soft); }
.answer-panel.wrong { border-color: #fecdd3; background: var(--danger-soft); }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.question-grid { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.grid-btn {
  width: 34px; height: 34px; min-height: 34px; padding: 0; border-radius: 10px;
  background: #f1f5f9; color: var(--text); border: 1px solid var(--border); box-shadow: none;
}
.grid-btn:hover { box-shadow: none; }
.grid-btn.current { background: var(--primary); color: #fff; border-color: var(--primary); }
.grid-btn.done { background: #dcfce7; color: #166534; border-color: #86efac; }
.grid-btn.partial { background: #fef3c7; color: #92400e; border-color: #fde68a; }
.grid-btn.wrong { background: #ffe4e6; color: #be123c; border-color: #fecdd3; }
.grid-btn.current.done, .grid-btn.current.partial, .grid-btn.current.wrong {
  outline: 3px solid #bfdbfe;
  outline-offset: 2px;
}
.grid-btn.current.done { background: #dcfce7; color: #166534; border-color: #86efac; }
.grid-btn.current.partial { background: #fef3c7; color: #92400e; border-color: #fde68a; }
.grid-btn.current.wrong { background: #ffe4e6; color: #be123c; border-color: #fecdd3; }
.tip { margin-top: 18px; padding: 12px; border-radius: 12px; background: #f8fafc; color: var(--muted); font-size: 13px; line-height: 1.6; }

.exam-setup {
  max-width: 1180px;
  border-color: #dbeafe;
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
}
.form-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.2fr) minmax(180px, 1fr) minmax(150px, .7fr) minmax(150px, .7fr);
  gap: 16px;
  margin: 16px 0 10px;
  align-items: end;
}
.range-hint {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 8px 12px;
  margin: 2px 0 18px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: #1e40af;
  font-size: 13px;
  font-weight: 700;
}
.exam-header, .section-head { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.wrongbook-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.wrongbook-actions button { flex: 1 0 auto; min-height: 44px; }
.timer { font-size: 24px; font-weight: 900; color: var(--danger); }

.import-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.sample-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.code-block { background: #0f172a; color: #dbeafe; padding: 16px; border-radius: 14px; overflow-x: auto; line-height: 1.65; }

.list { display: grid; gap: 12px; }
.list-item { border: 1px solid var(--border); border-radius: 16px; padding: 15px; background: #fff; }
.list-item h4 { margin: 0 0 8px; line-height: 1.5; }
.list-item p { margin: 6px 0; line-height: 1.65; }
.list-item.compact { display: grid; gap: 6px; }
.list-row { display: flex; justify-content: space-between; gap: 14px; align-items: flex-start; }
.list-row-main { min-width: 0; }
.list-row-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 14px; }
.stat-card { padding: 16px; border-radius: 16px; background: #f8fafc; border: 1px solid var(--border); }
.stat-card span { color: var(--muted); font-size: 13px; font-weight: 800; }
.stat-card strong { display: block; margin-top: 8px; font-size: 26px; }
.diagnostic-card strong { font-size: 17px; overflow-wrap: anywhere; }
.diagnostic-card.ok { border-color: #86efac; background: var(--success-soft); }
.diagnostic-card.bad { border-color: #fecdd3; background: var(--danger-soft); }
.stats-two-col { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; }
.weak-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 72px; padding: 5px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 900;
}
.weak-badge.critical { background: var(--danger-soft); color: #be123c; }
.weak-badge.warning { background: var(--warning-soft); color: #92400e; }
.weak-badge.review { background: var(--primary-soft); color: #1d4ed8; }
.progress-line {
  height: 8px; border-radius: 999px; background: #e5e7eb; overflow: hidden; margin-top: 10px;
}
.progress-line > span { display: block; height: 100%; background: linear-gradient(90deg, #2563eb, #60a5fa); border-radius: inherit; }

.saved-exam-box {
  border: 1px solid #bfdbfe;
  background: #eff6ff;
  border-radius: 14px;
  padding: 14px;
  margin: 6px 0 16px;
  line-height: 1.6;
}
.exam-recovery-box { border-color: #fbbf24; background: #fffbeb; }
.exam-recovery-box .list-item { background: rgba(255,255,255,.88); }
.saved-exam-title { font-weight: 900; margin-bottom: 6px; }
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .50);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 20;
}
.modal-card {
  width: min(520px, 100%);
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 22px;
}
.modal-card h3 { margin: 0 0 10px; }
.modal-card p { margin: 0 0 14px; line-height: 1.6; }
.toast {
  position: fixed; right: 20px; bottom: 20px; background: #0f172a; color: #fff;
  padding: 12px 16px; border-radius: 14px; box-shadow: var(--shadow); max-width: 360px; z-index: 30;
}
.result-good { color: var(--success); font-weight: 900; }
.result-partial { color: var(--warning); font-weight: 900; }
.result-bad { color: var(--danger); font-weight: 900; }
.exam-review-options {
  display: grid;
  gap: 6px;
  margin: 10px 0;
}
.exam-review-option {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  line-height: 1.55;
  color: var(--text);
}
.exam-review-option strong { color: var(--primary); }
.exam-question-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 12px 20px;
  margin-bottom: 12px;
}
.exam-question-heading h4 { flex: 1 1 280px; min-width: 0; margin: 0; overflow-wrap: anywhere; }
.exam-question-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.exam-question-actions button { min-height: 40px; padding: 8px 12px; font-size: 13px; white-space: nowrap; }
.exam-question-actions button::before { margin-right: 5px; }
.exam-question-favorite::before { content: "☆"; }
.exam-question-favorite[aria-pressed="true"]::before { content: "★"; }
.exam-question-actions .exam-question-favorite[aria-pressed="true"] { color: #92400e; background: #fef3c7; }
.exam-question-note::before { content: "▤"; }
.exam-question-actions .exam-question-note.has-note,
#questionNoteBtn.has-note {
  color: #6d28d9;
  background: #ede9fe;
  border-color: #c4b5fd;
}
.exam-question-actions .exam-question-note.has-note:hover,
#questionNoteBtn.has-note:hover {
  color: #5b21b6;
  background: #ddd6fe;
}
.exam-question-edit::before { content: "✎"; }

@media (max-width: 767px) {
  .exam-question-heading { display: block; }
  .exam-question-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 12px; gap: 6px; }
  .exam-question-actions button { flex: 1 1 auto; min-height: 44px; padding: 8px; font-size: 12px; }
  .exam-question-actions button::before { display: none; }
}

@media (max-width: 1100px) {
  .toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .toolbar button { width: fit-content; }
  .question-layout, .stats-two-col { grid-template-columns: 1fr; }
}
@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .main { padding: 18px; }
  .toolbar, .import-grid, .form-grid, .stats-grid { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; }
}

@media (max-width: 767px) {
  body { padding-bottom: 0; overflow-x: hidden; }
  .app-shell { display: block; }
  .sidebar {
    position: sticky;
    top: 0;
    z-index: 19;
    height: auto;
    padding: 10px 14px;
    overflow: visible;
  }
  .brand { margin-bottom: 0; }
  .brand-icon { width: 42px; height: 42px; border-radius: 13px; }
  .brand h1 { font-size: 18px; }
  .mobile-menu-btn {
    display: block;
    min-height: 40px;
    margin-left: auto;
    padding: 8px 14px;
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.18);
    box-shadow: none;
  }
  .sidebar > .side-card:not(.account-card) { display: none; }
  .sidebar.menu-open .bank-switcher { display: grid; }
  .account-card { display: none; margin-top: 12px; grid-template-columns: 1fr 1fr; }
  .sidebar.menu-open .account-card { display: grid; }
  .account-card label:first-child,
  .account-card p,
  .account-card .config-hint { grid-column: 1 / -1; }
  .nav {
    display: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,.12);
  }
  .sidebar.menu-open .nav { display: grid; }
  .nav-btn {
    min-height: 42px;
    padding: 8px 10px;
    text-align: center;
    font-size: 13px;
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 10px;
  }
  .main { padding: 14px; }
  .topbar { margin-bottom: 14px; }
  .topbar h2 { font-size: 24px; }
  .top-actions { width: 100%; display: grid; grid-template-columns: 1fr 1fr; }
  .top-actions button:last-child { grid-column: 1 / -1; }
  .card { padding: 15px; border-radius: 16px; }
  .toolbar, .import-grid, .form-grid, .stats-grid, .stats-two-col { grid-template-columns: 1fr; }
  .bank-manager-grid { grid-template-columns: 1fr; }
  .toolbar button, .sample-actions button, .answer-actions button { width: 100%; min-height: 44px; }
  .question-card h3, .exam-running h3 { font-size: 18px; }
  .question-layout { display: flex; flex-direction: column; }
.progress-card { order: 2; }
  .option { min-height: 52px; padding: 14px 12px; }
  .exam-header {
    position: sticky;
    top: 0;
    z-index: 8;
    margin: -15px -15px 14px;
    padding: 12px 15px;
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
  }
  .list-row, .section-head { flex-direction: column; align-items: stretch; }
  .list-row-actions { justify-content: flex-start; }
  .modal-card .answer-actions { display: grid; grid-template-columns: 1fr; }
  pre { max-width: 100%; }
}


.import-options {
  display: grid;
  grid-template-columns: 110px repeat(2, minmax(220px, 1fr));
  gap: 12px;
  align-items: stretch;
  margin: 14px 0 18px;
}
.option-title {
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
}
.radio-card {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  cursor: pointer;
}
.radio-card input { margin-top: 3px; }
.radio-card span { display: grid; gap: 4px; }
.radio-card em { font-style: normal; color: var(--muted); font-size: 12px; }
.small-note { margin-top: 8px; font-size: 12px; }
@media (max-width: 920px) {
  .import-options { grid-template-columns: 1fr; }
}

.progress-card {
  align-self: start;
  position: sticky;
  top: 20px;
}
.answer-card-summary-btn { width: 100%; margin-top: 16px; }
.answer-card-trigger { display: none; }
.answer-card-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(15, 23, 42, .52);
  backdrop-filter: blur(5px);
}
.answer-card-sheet {
  width: min(720px, 100%);
  max-height: min(820px, calc(100vh - 44px));
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow);
}
.answer-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.answer-card-head h3 { margin: 0; font-size: 24px; }
.answer-card-head p { margin: 6px 0 0; }
.answer-card-close { min-height: 38px; padding: 8px 13px; }
.answer-card-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 20px 0 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.answer-card-legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend-dot {
  width: 14px;
  height: 14px;
  display: inline-block;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: #fff;
}
.legend-dot.correct { background: var(--success); border-color: var(--success); }
.legend-dot.partial { background: var(--warning); border-color: var(--warning); }
.legend-dot.incorrect { background: var(--danger); border-color: var(--danger); }
.legend-dot.current { background: var(--primary); border-color: var(--primary); }
.question-range-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 8px;
}
.range-tab {
  min-height: 36px;
  flex: 0 0 auto;
  padding: 7px 12px;
  color: var(--muted);
  background: var(--panel-soft);
  border: 1px solid var(--border);
  box-shadow: none;
}
.range-tab:hover { box-shadow: none; }
.range-tab.active { color: #fff; background: var(--primary); border-color: var(--primary); }
.answer-card-grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(42px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.answer-card-grid .grid-btn {
  width: 100%;
  aspect-ratio: 1;
  height: auto;
  min-height: 44px;
  border-radius: 50%;
  font-size: 14px;
}
.answer-card-grid .grid-btn.current {
  outline: 3px solid #bfdbfe;
  outline-offset: 2px;
}
.answer-card-open { overflow: hidden; }

@media (max-width: 767px) {
  body { padding-bottom: 0; background: #f3f5f8; }
  .main { padding: 10px; }
  #tab-practice {
    padding-bottom: calc(104px + env(safe-area-inset-bottom));
  }
  .topbar { padding: 4px 4px 0; }
  .topbar p { font-size: 13px; }
  #tab-practice .toolbar {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    margin: 0 -10px 10px;
    padding: 10px;
    border-width: 1px 0;
    border-radius: 0;
    box-shadow: none;
  }
  #tab-practice .toolbar label { min-width: 130px; flex: 0 0 auto; }
  #tab-practice .toolbar .search-wrap { min-width: 210px; }
  #tab-practice .toolbar button { width: auto; min-width: 100px; flex: 0 0 auto; }
  .question-card {
    padding: 18px 14px 24px;
    border-radius: 18px;
    box-shadow: none;
  }
  .question-meta { margin-bottom: 16px; }
  .question-card h3 {
    margin: 4px 0 22px;
    font-size: 20px;
    line-height: 1.72;
    font-weight: 700;
  }
  .options { gap: 12px; }
  .option {
    min-height: 58px;
    padding: 13px 12px;
    border-radius: 16px;
    align-items: center;
    font-size: 16px;
  }
  .answer-panel {
    margin-top: 20px;
    padding: 16px;
    border-radius: 16px;
    line-height: 1.85;
  }
  .progress-card { display: none; }
  .question-card > .answer-actions {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 17;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 5px;
    margin: 0;
    padding: 8px 7px calc(8px + env(safe-area-inset-bottom));
    background: rgba(255,255,255,.97);
    border-top: 1px solid var(--border);
    box-shadow: 0 -8px 22px rgba(15, 23, 42, .08);
    backdrop-filter: blur(12px);
  }
  .question-card > .answer-actions button {
    width: 100%;
    min-height: 44px;
    padding: 7px 3px;
    border-radius: 11px;
    font-size: 11px;
  }
  .question-card > .answer-actions #submitAnswerBtn { font-size: 12px; }
  .answer-card-trigger { display: block; }
  .answer-card-open .question-card > .answer-actions { display: none; }
  .answer-card-backdrop { align-items: end; padding: 0; }
  .answer-card-sheet {
    width: 100%;
    max-height: 88vh;
    padding: 18px 14px calc(32px + env(safe-area-inset-bottom));
    border-width: 1px 0 0;
    border-radius: 24px 24px 0 0;
  }
  .answer-card-sheet::before {
    content: "";
    display: block;
    width: 42px;
    height: 4px;
    margin: -8px auto 14px;
    border-radius: 999px;
    background: var(--border-strong);
  }
  .answer-card-head h3 { font-size: 21px; }
  .answer-card-legend { justify-content: space-between; gap: 10px; margin-top: 16px; }
  .answer-card-grid { grid-template-columns: repeat(5, minmax(44px, 1fr)); gap: 14px 12px; }
  .answer-card-grid .grid-btn { min-height: 48px; font-size: 15px; }
}

/* 2026-06 mobile polish: avoid bottom overlap, move global actions out of practice home, compact filters */
.source-manager-card {
  display: grid;
  gap: 14px;
}
.source-manager-count {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}
.source-manager-toolbar {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto;
  gap: 10px;
}
.source-manager-toolbar button,
.source-manager-footer button {
  min-height: 40px;
  padding: 8px 14px;
  box-shadow: none;
}
.source-manager-list {
  display: grid;
  gap: 7px;
  max-height: 360px;
  overflow: auto;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(248,250,252,.72);
}
.source-manager-item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}
.source-manager-item:hover {
  border-color: #bfdbfe;
  background: #f8fbff;
}
.source-manager-item:has(input:checked) {
  border-color: #93c5fd;
  background: #eff6ff;
}
.source-manager-item input {
  width: 18px;
  min-height: 18px;
  margin: 0;
}
.source-manager-item span {
  min-width: 0;
  overflow-wrap: anywhere;
  line-height: 1.45;
}
.source-manager-item strong {
  color: #475569;
  font-size: 12px;
  white-space: nowrap;
}
.source-manager-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.source-manager-warning {
  margin: 0;
  color: #9f1239;
  font-size: 12px;
  line-height: 1.55;
}
.source-manager-empty {
  margin: 8px;
}

@media (max-width: 767px) {
  :root {
    --mobile-answer-bar-height: 70px;
    --mobile-extra-bottom: 104px;
  }

  html, body {
    min-height: 100%;
    overflow-x: hidden;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 30;
  }

  .main {
    padding: 10px 10px calc(var(--mobile-extra-bottom) + env(safe-area-inset-bottom));
  }

  #tab-practice {
    padding-bottom: calc(var(--mobile-extra-bottom) + env(safe-area-inset-bottom));
  }

  .topbar {
    gap: 6px;
    margin-bottom: 8px;
    padding: 2px 4px 0;
  }

  .topbar h2 {
    font-size: 22px;
    line-height: 1.2;
  }

  .topbar p {
    margin-top: 4px;
    font-size: 12px;
    line-height: 1.45;
  }

  .top-actions {
    display: none !important;
  }

  #tab-practice .toolbar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    overflow: visible;
    margin: 0 0 10px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: none;
    background: rgba(255,255,255,.94);
  }

  #tab-practice .toolbar label,
  #tab-practice .toolbar .search-wrap {
    min-width: 0;
    width: 100%;
    flex: initial;
    gap: 5px;
    font-size: 12px;
    line-height: 1.2;
  }

  #tab-practice .toolbar select,
  #tab-practice .toolbar input {
    min-height: 38px;
    height: 38px;
    padding: 7px 10px;
    border-radius: 11px;
    font-size: 13px;
  }

  #tab-practice .toolbar .search-wrap {
    grid-column: 1 / -1;
  }

  #tab-practice .toolbar button {
    grid-column: 1 / -1;
    width: 100%;
    min-height: 40px;
    height: 40px;
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 13px;
  }

  .question-card {
    padding: 18px 14px 22px;
    margin-bottom: 10px;
  }

  .question-card h3 {
    font-size: 19px;
    line-height: 1.72;
  }

  .options {
    padding-bottom: 8px;
  }

  .option {
    min-height: 56px;
    font-size: 15px;
    line-height: 1.55;
  }

  .answer-panel {
    margin-bottom: 6px;
    padding-bottom: 14px;
  }

  .question-card > .answer-actions {
    left: 0;
    right: 0;
    bottom: 0;
    min-height: calc(var(--mobile-answer-bar-height) + env(safe-area-inset-bottom));
    padding: 7px 8px calc(8px + env(safe-area-inset-bottom));
    align-items: center;
  }

  .question-card > .answer-actions button {
    min-height: 40px;
    font-size: 12px;
  }

  .exam-running {
    padding-bottom: calc(var(--mobile-extra-bottom) + env(safe-area-inset-bottom));
  }

  .exam-running > .answer-actions {
    position: sticky;
    bottom: 0;
    z-index: 12;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin: 18px -10px -10px;
    padding: 10px 10px calc(10px + env(safe-area-inset-bottom));
    background: rgba(255,255,255,.96);
    border-top: 1px solid var(--border);
    backdrop-filter: blur(12px);
  }

  .sample-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .sample-actions button {
    width: 100%;
  }
}

/* 2026-08 production practice workspace: desktop dashboard + mobile-first answering */
.app-shell {
  grid-template-columns: 280px minmax(0, 1fr);
}

.sidebar {
  padding: 20px 16px;
}

.brand {
  margin-bottom: 18px;
  padding: 10px;
  border-radius: 18px;
}

.brand-icon {
  width: 46px;
  height: 46px;
  border-radius: 15px;
}

.brand h1 { font-size: 19px; }
.nav { gap: 7px; margin-bottom: 16px; }
.nav-btn { min-height: 44px; border-radius: 14px; }
.side-card { padding: 14px; border-radius: 18px; }
.side-card + .side-card { margin-top: 12px; }

.diagnostics-entry-btn {
  min-height: 34px;
  padding: 7px 10px;
  color: #9fb1c8;
  border-color: rgba(148, 163, 184, .16);
  background: rgba(15, 23, 42, .22);
  box-shadow: none;
  font-size: 12px;
}

.diagnostics-entry-btn:hover {
  color: #dbeafe;
  border-color: rgba(147, 197, 253, .28);
  background: rgba(59, 130, 246, .10);
}

.main {
  max-width: 1680px;
  padding: 22px 26px 48px;
}

.topbar {
  min-height: auto;
  margin-bottom: 16px;
  padding: 4px 2px 12px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.topbar::before,
.topbar::after,
.topbar-visual,
.eyebrow { display: none; }

.topbar h2 {
  font-size: clamp(24px, 2.2vw, 32px);
  letter-spacing: -.035em;
}

.topbar p {
  margin-top: 5px;
  color: #68758a;
  font-size: 13px;
  line-height: 1.55;
}

#tab-practice .practice-toolbar {
  grid-template-columns: minmax(130px, .9fr) minmax(150px, 1.05fr) minmax(120px, .75fr) minmax(120px, .72fr) minmax(210px, 1.35fr) auto;
  gap: 10px;
  margin-bottom: 18px;
  padding: 16px 18px;
  border-color: #e7ebf3;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 10px 30px rgba(15, 23, 42, .055);
}

#tab-practice .practice-toolbar label {
  color: #68758a;
  font-size: 11px;
}

#tab-practice .practice-toolbar select,
#tab-practice .practice-toolbar input {
  min-height: 42px;
  height: 42px;
  border-radius: 11px;
  background-color: #f9fbff;
}

#tab-practice .practice-toolbar #buildPracticeBtn {
  min-height: 42px;
  align-self: end;
  padding-inline: 20px;
  border-radius: 11px;
}

#tab-practice .practice-count-hint {
  grid-column: 1 / -1;
  margin-top: 0;
  padding: 8px 10px;
  border-radius: 10px;
  background: #f7f9fc;
}

.question-layout {
  grid-template-columns: minmax(0, 1fr) 326px;
  gap: 18px;
  align-items: start;
}

.question-card {
  min-height: min(680px, calc(100vh - 220px));
  padding: 24px;
  border-color: #e7ebf3;
  background: rgba(255,255,255,.96);
  box-shadow: 0 14px 38px rgba(15, 23, 42, .065);
}

.question-card::after {
  width: 120px;
  height: 120px;
  opacity: .48;
}

.question-card-header {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.question-meta {
  margin: 0;
  gap: 8px;
}

.question-meta span {
  min-height: 28px;
  padding: 5px 10px;
  border-color: #e4e9f2;
  background: #f6f8fc;
  color: #64748b;
}

#questionType {
  color: #2563eb;
  border-color: #dbeafe;
  background: #eff6ff;
}

.question-tools {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 7px;
  flex-wrap: wrap;
}

.question-tool-btn,
.question-more-menu button {
  min-height: 34px;
  padding: 7px 10px;
  border-radius: 10px;
  box-shadow: none;
  font-size: 12px;
}

.question-tool-btn::before,
.question-more-menu button::before {
  display: inline-block;
  margin-right: 5px;
  font-size: 13px;
}

#bookmarkBtn::before { content: "☆"; }
#openAnswerCardBtn::before { content: "▦"; }
#questionMoreBtn::before { content: "•••"; letter-spacing: -2px; }
#questionNoteBtn::before { content: "▤"; }
#editQuestionBtn::before { content: "✎"; }
#deleteQuestionBtn::before { content: "⌫"; }

.question-more-trigger,
.answer-card-trigger { display: none; }

.question-more-menu {
  display: flex;
  align-items: center;
  gap: 7px;
}

.question-more-menu #deleteQuestionBtn {
  color: #dc2626;
  border-color: #fecaca;
  background: #fffafa;
}

.question-more-menu #deleteQuestionBtn:hover {
  color: #fff;
  border-color: #ef4444;
  background: #ef4444;
}

.question-card h3 {
  margin-top: 0;
  font-size: clamp(20px, 1.65vw, 26px);
  line-height: 1.55;
}

.options {
  gap: 11px;
  margin-top: 24px;
}

.option {
  min-height: 62px;
  padding: 13px 15px;
  border-color: #e5eaf2;
  border-radius: 14px;
  background: #fff;
  box-shadow: none;
}

.option:hover {
  border-color: #bfdbfe;
  background: #f8fbff;
  transform: translateY(-1px);
}

.option.selected {
  border-color: #4f7cff;
  background: linear-gradient(90deg, #f5f8ff, #fbfaff);
  box-shadow: 0 0 0 2px rgba(79,124,255,.08);
}

:where(.question-card, .exam-running) > .answer-actions {
  display: grid;
  grid-template-columns: minmax(120px, 160px) minmax(220px, 1fr) minmax(120px, 160px);
  gap: 12px;
  margin-top: 26px;
}

:where(.question-card, .exam-running) > .answer-actions > button {
  width: 100%;
  min-height: 46px;
}

.question-card > .answer-actions {
  grid-template-columns: minmax(112px, 150px) minmax(180px, 220px) minmax(112px, 150px);
  justify-content: center;
  width: 100%;
  max-width: 544px;
  margin-inline: auto;
}

.question-card > .answer-actions button {
  min-height: 42px;
}

.progress-card {
  top: 18px;
  padding: 20px;
  border-color: #e7ebf3;
  background: rgba(255,255,255,.96);
  box-shadow: 0 14px 38px rgba(15, 23, 42, .06);
}

.progress-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.progress-card-header h3 {
  margin: 2px 0 0;
  font-size: 20px;
}

.section-kicker {
  color: #8a98ad;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .12em;
}

#practiceProgressPercent {
  color: #2563eb;
  font-size: 20px;
}

.practice-progress-overview {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin-top: 20px;
}

.practice-progress-ring {
  --practice-progress: 0deg;
  width: 116px;
  height: 116px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(#3867ed var(--practice-progress), #e8edf5 0);
}

.practice-progress-ring::before {
  content: "";
  position: absolute;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: #fff;
}

.practice-progress-ring > div {
  position: relative;
  z-index: 1;
  display: grid;
  text-align: center;
}

.practice-progress-ring strong { color: #111827; font-size: 22px; }
.practice-progress-ring span { color: #94a3b8; font-size: 10px; }

.practice-progress-legend {
  display: grid;
  gap: 9px;
}

.practice-progress-legend > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: #64748b;
  font-size: 12px;
}

.practice-progress-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.progress-dot {
  width: 8px;
  height: 8px;
  display: inline-block;
  border-radius: 50%;
}

.progress-dot.answered { background: #3867ed; }
.progress-dot.unanswered { background: #cbd5e1; }
.progress-dot.correct { background: #22c55e; }
.progress-dot.wrong { background: #ef4444; }

.practice-metric-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  margin-top: 18px;
}

.practice-metric-strip > div {
  display: grid;
  gap: 5px;
  padding: 12px;
  border: 1px solid #e7ebf3;
  border-radius: 13px;
  background: #f8fafc;
}

.practice-metric-strip span { color: #8491a5; font-size: 10px; }
.practice-metric-strip strong { color: #172033; font-size: 16px; }
.practice-metric-strip > div:first-child strong { color: #16a34a; }

.progress-card-summary {
  margin-top: 14px;
  font-size: 11px;
}

.answer-card-summary-btn {
  width: 100%;
  min-height: 42px;
  margin-top: 14px;
}

.progress-card .tip {
  margin-top: 12px;
  border-radius: 12px;
  background: #f5f7fa;
  font-size: 11px;
}

@media (max-width: 1180px) and (min-width: 768px) {
  #tab-practice .practice-toolbar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  #tab-practice .practice-toolbar #buildPracticeBtn { grid-column: auto; }
  .question-layout { grid-template-columns: minmax(0, 1fr) 290px; }
  .question-card-header { align-items: flex-start; }
  .question-more-menu { justify-content: flex-end; }
}

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .main { max-width: none; }
  .question-layout { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  body { background: #f1f5fb; }

  .sidebar {
    padding: 10px 12px;
    border-radius: 0 0 22px 22px;
  }

  .main { padding: 10px 10px 28px; }

  .topbar {
    margin-bottom: 10px;
    padding: 12px 14px;
    border: 1px solid rgba(255,255,255,.84);
    border-radius: 18px;
    background: rgba(255,255,255,.84);
    box-shadow: 0 8px 22px rgba(15,23,42,.055);
  }

  .topbar h2 { font-size: 21px; }
  .topbar p { margin-top: 3px; font-size: 11px; line-height: 1.45; }

  #tab-practice .practice-toolbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding: 12px;
  }

  #tab-practice .practice-toolbar #buildPracticeBtn,
  #tab-practice .practice-toolbar .practice-search-field,
  #tab-practice .practice-toolbar .practice-count-hint {
    grid-column: 1 / -1;
  }

  .question-card {
    min-height: auto;
    padding: 16px 14px 12px;
    overflow: visible;
  }

  .question-card-header {
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 14px;
  }

  .question-meta { min-width: 0; flex: 1 1 auto; }
  #questionChapter { display: none; }

  .question-tools {
    flex: 0 0 auto;
    flex-wrap: nowrap;
    gap: 3px;
  }

  .question-tool-btn {
    min-height: 32px;
    padding: 6px 7px;
    border-color: transparent;
    background: transparent;
    font-size: 10px;
  }

  .question-tool-btn::before { margin-right: 3px; }
  .question-more-trigger,
  .answer-card-trigger { display: inline-flex; }

  .question-more-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    z-index: 20;
    width: 154px;
    display: none;
    padding: 7px;
    border: 1px solid #e4e9f2;
    border-radius: 14px;
    background: rgba(255,255,255,.98);
    box-shadow: 0 18px 42px rgba(15,23,42,.16);
  }

  .question-more-menu.open { display: grid; gap: 4px; }

  .question-more-menu button {
    width: 100%;
    min-height: 38px;
    justify-content: flex-start;
    text-align: left;
  }

  .question-card h3 {
    font-size: 18px;
    line-height: 1.62;
  }

  .options { margin-top: 18px; }

  .option {
    min-height: 58px;
    padding: 12px;
    border-radius: 15px;
  }

  .question-card > .answer-actions {
    position: sticky !important;
    bottom: env(safe-area-inset-bottom);
    grid-template-columns: minmax(72px, .8fr) minmax(120px, 1.45fr) minmax(72px, .8fr);
    justify-content: stretch;
    width: auto;
    max-width: none;
    gap: 7px;
    margin: 16px -6px -4px;
    padding: 8px 6px calc(8px + env(safe-area-inset-bottom));
  }

  .question-card > .answer-actions #submitAnswerBtn {
    grid-column: auto;
    font-size: 12px;
  }

  .question-card > .answer-actions button {
    min-height: 42px;
    font-size: 11px;
  }

  .progress-card { display: none; }
}

/* 2026-08 exam pause: freeze time, protect answers and resume deliberately */
body.exam-paused { overflow: hidden; }

.exam-running > .answer-actions {
  grid-template-columns: repeat(5, minmax(108px, 150px));
  max-width: 798px;
}

.exam-pause-btn {
  color: #92400e;
  border-color: #f6d58a;
  background: #fffbeb;
}

.exam-pause-btn:hover {
  color: #78350f;
  border-color: #f59e0b;
  background: #fef3c7;
}

.exam-pause-overlay {
  position: fixed !important;
  inset: 0;
  z-index: 220;
  display: grid;
  place-items: center;
  padding: 22px;
  background:
    radial-gradient(circle at 50% 38%, rgba(96,165,250,.16), transparent 34%),
    rgba(8,18,38,.72);
  backdrop-filter: blur(15px) saturate(.82);
}

.exam-pause-card {
  width: min(440px, 100%);
  padding: 30px;
  overflow: hidden;
  text-align: center;
  border: 1px solid rgba(255,255,255,.86);
  border-radius: 28px;
  background:
    radial-gradient(circle at 100% 0%, rgba(99,102,241,.14), transparent 34%),
    linear-gradient(155deg, rgba(255,255,255,.99), rgba(245,248,255,.97));
  box-shadow: 0 34px 90px rgba(2,6,23,.34), inset 0 1px 0 #fff;
}

.exam-pause-kicker {
  display: inline-flex;
  padding: 5px 11px;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
  border-radius: 999px;
  background: #eff6ff;
  font-size: 10px;
  font-weight: 950;
  letter-spacing: .16em;
}

.exam-pause-icon {
  width: 68px;
  height: 68px;
  display: grid;
  place-items: center;
  margin: 18px auto 12px;
  color: #fff;
  border-radius: 23px;
  background: linear-gradient(145deg, #3b82f6, #6d5dfc);
  box-shadow: 0 16px 34px rgba(79,70,229,.27);
}

.exam-pause-icon::before {
  content: "";
  width: 8px;
  height: 26px;
  transform: translateX(-7px);
  border-radius: 3px;
  background: currentColor;
  box-shadow: 14px 0 0 currentColor;
}

.exam-pause-card h3 {
  margin: 0 0 8px;
  color: #111827;
  font-size: 25px;
}

.exam-pause-card p {
  margin: 0;
  color: #64748b;
  font-size: 13px;
  line-height: 1.65;
}

.exam-pause-time {
  display: grid;
  gap: 4px;
  margin: 22px 0;
  padding: 15px;
  border: 1px solid #dbeafe;
  border-radius: 18px;
  background: rgba(239,246,255,.72);
}

.exam-pause-time span {
  color: #64748b;
  font-size: 11px;
  font-weight: 850;
}

.exam-pause-time strong {
  color: #172554;
  font-size: 25px;
  letter-spacing: -.035em;
}

.exam-pause-actions {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 10px;
}

.exam-pause-actions button {
  min-height: 46px;
  border-radius: 14px;
}

.saved-exam-pause-note {
  width: fit-content;
  margin-top: 8px;
  padding: 7px 10px;
  color: #92400e;
  border: 1px solid #fde68a;
  border-radius: 10px;
  background: #fffbeb;
  font-size: 11px;
  font-weight: 800;
}

@media (max-width: 767px) {
  .exam-running > .answer-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: none;
  }

  .exam-running > .answer-actions #examPauseBtn { grid-column: 1 / -1; }
  .exam-pause-overlay { padding: 14px; }
  .exam-pause-card { padding: 24px 18px 20px; border-radius: 24px; }
  .exam-pause-card h3 { font-size: 22px; }
  .exam-pause-actions { grid-template-columns: 1fr; }
}

/* Exam workspace: full-width setup and equally weighted result metrics. */
body:has(#tab-exam.active) { background: #f4f6fa; }
body:has(#tab-exam.active)::before,
body:has(#tab-exam.active)::after { display: none; }
.main:has(#tab-exam.active) { max-width: none; }

#tab-exam .exam-setup {
  width: 100%;
  max-width: none;
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.exam-create-card {
  border: 1px solid #e2e8f0;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 3px 14px rgba(29,49,80,.035);
}

.exam-setup-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 20px 24px 16px;
}

.exam-setup-copy { min-width: 0; }
.exam-setup-copy h3 {
  margin: 0 0 6px;
  font-size: 19px;
  letter-spacing: 0;
}

.exam-setup-copy p {
  margin: 0;
  color: #64748b;
  font-size: 13px;
  line-height: 1.65;
}

.exam-setup-overview {
  flex-shrink: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid #dbe7fa;
  border-radius: 12px;
  background: #f5f8ff;
}

.exam-setup-overview span {
  color: #64748b;
  font-size: 11px;
  font-weight: 500;
}

.exam-setup-overview strong {
  color: #172554;
  font-size: 19px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.exam-config-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 160px;
  grid-template-areas: "fields action" "hint hint";
  align-items: end;
  gap: 12px 16px;
  margin: 0;
  padding: 0 24px 18px;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.exam-form-grid {
  grid-area: fields;
  margin: 0;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr) minmax(0, .7fr) minmax(0, .7fr);
  gap: 12px;
}

.exam-form-grid label {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.exam-form-grid label > span:first-child {
  color: #526177;
  font-size: 12px;
  font-style: normal;
  font-weight: 600;
}

.exam-form-grid select,
.exam-form-grid input {
  min-height: 46px;
  border-color: rgba(148,163,184,.28);
  border-radius: 10px;
  background: #fff;
  box-shadow: none;
}

.exam-form-grid select:focus,
.exam-form-grid input:focus {
  border-color: #60a5fa;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(59,130,246,.10);
}

.exam-input-unit { position: relative; display: block; }
.exam-input-unit input { width: 100%; padding-right: 54px; }
.exam-input-unit i {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  color: #8491a5;
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
  pointer-events: none;
}

.exam-start-row {
  grid-area: hint;
  min-width: 0;
}

.exam-start-row .range-hint {
  min-height: auto;
  margin: 0;
  padding: 0;
  color: #526177;
  background: transparent;
  font-weight: 400;
}

.exam-start-btn {
  grid-area: action;
  min-width: 160px;
  min-height: 46px;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 2px;
  padding: 9px 20px;
  border-radius: 10px;
  background: #3867e8;
  box-shadow: none;
}

.exam-start-btn:hover { background: #2856cd; transform: none; box-shadow: none; }
.exam-start-btn span { font-size: 14px; font-weight: 600; }

#examSetup > #savedExamBox,
#examSetup > #examRecoveryBox {
  margin: 18px 0;
}

#examHistoryBox {
  margin: 24px 0 20px;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.exam-history-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  padding: 0 3px;
}

.exam-history-head h3 { margin: 0; font-size: 19px; }
.exam-history-count {
  padding: 6px 10px;
  border-radius: 999px;
  color: #475569;
  background: #e9eef5;
  font-size: 12px;
  font-weight: 500;
}

.exam-history-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  background: #fff;
}
.exam-history-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  color: #64748b;
  font-size: 13px;
}
.exam-history-page-controls { display: flex; align-items: center; gap: 12px; }
.exam-history-page-controls > span { white-space: nowrap; font-variant-numeric: tabular-nums; }
.exam-history-page-controls > button {
  flex: 0 0 auto;
  width: 88px;
  min-width: 0;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: 12px;
  font-size: 13px;
  white-space: nowrap;
}
.exam-history-head h3 { scroll-margin-top: 88px; }
@media (max-width: 640px) {
  .exam-history-pagination { justify-content: center; }
  .exam-history-range { width: 100%; text-align: center; }
  .exam-history-page-controls { width: 100%; justify-content: space-between; gap: 8px; }
  .exam-history-page-controls > button { width: 80px; }
}
.exam-history-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px 24px;
  min-width: 0;
  position: relative;
  padding: 20px;
  transition: background .18s ease;
}
.exam-history-item + .exam-history-item { border-top: 1px solid #edf0f5; }
.exam-history-item:first-child { border-radius: 16px 16px 0 0; }
.exam-history-item:last-child { border-radius: 0 0 16px 16px; }
.exam-history-item:only-child { border-radius: 16px; }
.exam-history-item:hover { background: #fafbfe; }

.exam-history-card-top,
.exam-history-title-block,
.exam-history-actions {
  display: flex;
  align-items: center;
}
.exam-history-card-top { grid-column: 1 / -1; justify-content: space-between; gap: 18px; }
.exam-history-title-block { min-width: 0; gap: 12px; }
.exam-history-index {
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #64748b;
  background: #f1f5f9;
  font-size: 12px;
  font-weight: 600;
}
.exam-history-title-block > div { min-width: 0; }
.exam-history-title-block h4 { margin: 0 0 5px; font-size: 16px; font-weight: 650; line-height: 1.5; overflow-wrap: anywhere; }
.exam-history-title-block time { color: #64748b; font-size: 12px; font-weight: 400; }
.exam-score-badge {
  min-width: 98px;
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 3px;
  padding: 9px 12px;
  border-radius: 10px;
}
.exam-score-badge.pass { color: #047857; background: #ecfdf5; border: 1px solid rgba(16,185,129,.25); }
.exam-score-badge.fail { color: #be123c; background: #fff1f2; border: 1px solid rgba(244,63,94,.22); }
.exam-score-badge strong { font-size: 22px; letter-spacing: -.02em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.exam-score-badge span { font-size: 11px; font-weight: 500; white-space: nowrap; }
.exam-score-badge.pending { flex-direction: column; align-items: center; color: #6d28d9; background: #f5f3ff; border: 1px solid #ddd6fe; }
.exam-score-badge.pending strong { font-size: 16px; }

.exam-history-metrics {
  display: grid;
  grid-template-columns: minmax(72px, .7fr) minmax(110px, 1fr) minmax(160px, 1.6fr);
  align-items: start;
  min-width: 0;
  gap: 16px;
  margin: 0;
}
.exam-history-metrics > div {
  min-width: 0;
}
.exam-history-metrics > div > span,
.exam-history-metrics small { display: block; color: #64748b; font-size: 12px; font-weight: 400; line-height: 1.5; }
.exam-history-metrics strong { display: block; margin: 5px 0 2px; color: #24334b; font-size: 15px; font-weight: 600; line-height: 1.5; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.exam-type-results { display: flex; flex-wrap: wrap; gap: 4px 14px; }
.exam-history-metrics .exam-partial-count { margin-top: 3px; color: #8a5b14; }

.exam-history-actions {
  justify-content: flex-end;
  gap: 8px;
}
.exam-history-actions button {
  min-height: 42px;
  padding: 9px 12px;
  border-radius: 10px;
  box-shadow: none;
  font-size: 13px;
  font-weight: 600;
}
.exam-history-actions > .exam-review-btn {
  width: 88px;
  color: #fff;
  border-color: transparent;
  background: #3867e8;
  box-shadow: none;
}
.exam-history-more-btn { width: 72px; white-space: nowrap; }
.exam-history-more { position: relative; }
.exam-history-menu {
  position: absolute;
  right: 0;
  bottom: calc(100% + 7px);
  z-index: 12;
  width: 190px;
  display: grid;
  gap: 4px;
  padding: 7px;
  border: 1px solid rgba(148,163,184,.24);
  border-radius: 14px;
  background: rgba(255,255,255,.98);
  box-shadow: 0 18px 46px rgba(15,23,42,.16);
}
.exam-history-menu button { width: 100%; justify-content: flex-start; text-align: left; }

@media (min-width: 1280px) {
  .exam-history-item { grid-template-columns: minmax(176px, 1.2fr) 108px minmax(384px, 2fr) 168px; gap: 16px; }
  .exam-history-card-top { display: contents; }
  .exam-history-metrics { gap: 12px; padding-left: 16px; border-left: 1px solid #edf0f5; }
}
@media (max-width: 1180px) {
  .exam-config-panel { grid-template-areas: "fields fields" "hint action"; align-items: center; }
  .exam-form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 767px) {
  .exam-create-card { border-radius: 14px; }
  .exam-setup-hero { align-items: flex-start; gap: 12px; padding: 16px 14px; }
  .exam-setup-copy h3 { font-size: 18px; }
  .exam-setup-copy p { font-size: 12px; }
  .exam-setup-overview { flex-direction: column; gap: 3px; padding: 8px 10px; }
  .exam-setup-overview strong { font-size: 18px; }
  .exam-config-panel { grid-template-columns: minmax(0, 1fr); grid-template-areas: "fields" "hint" "action"; padding: 0 14px 16px; }
  .exam-form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
  .exam-form-grid select,
  .exam-form-grid input { min-height: 41px; height: 41px; padding: 7px 9px; border-radius: 11px; font-size: 12px; }
  .exam-start-row .range-hint { font-size: 11px; line-height: 1.5; }
  .exam-start-btn { width: 100%; min-width: 0; min-height: 44px; }
  #examSetup > #savedExamBox,
  #examSetup > #examRecoveryBox { margin: 14px 0; }
  #examHistoryBox { margin: 22px 0 20px; }
  .exam-history-list { gap: 12px; border: 0; border-radius: 0; background: transparent; }
  .exam-history-list .exam-history-item { grid-template-columns: minmax(0, 1fr); padding: 16px; gap: 16px; border: 1px solid #e2e8f0; border-radius: 14px; background: #fff; }
  .exam-history-card-top { align-items: flex-start; gap: 10px; }
  .exam-history-index { display: none; }
  .exam-history-title-block { gap: 8px; }
  .exam-history-title-block h4 { font-size: 15px; }
  .exam-history-title-block time { font-size: 11px; }
  .exam-score-badge { min-width: 76px; padding: 7px 8px; }
  .exam-score-badge strong { font-size: 17px; }
  .exam-score-badge span { font-size: 9px; }
  .exam-history-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 14px 0; border-top: 1px solid #edf0f5; border-bottom: 1px solid #edf0f5; }
  .exam-history-metrics .exam-type-performance { grid-column: 1 / -1; }
  .exam-type-results { gap: 4px 22px; }
  .exam-history-actions { display: grid; grid-template-columns: minmax(0, 1fr) 80px; }
  .exam-history-actions button { width: 100%; min-width: 0; min-height: 44px; padding: 7px 9px; font-size: 12px; }
  .exam-history-actions > .exam-review-btn { width: 100%; }
  .exam-history-more-btn { width: 100%; }
}

/* Exam review controls: persistent marking and in-place question editing */
.exam-header {
  flex-wrap: wrap;
}

.exam-header-summary {
  min-width: 0;
}

.exam-question-tools {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.exam-question-tools .exam-tool-btn {
  width: auto;
  min-height: 38px;
  padding: 8px 13px;
  border-radius: 12px;
  white-space: nowrap;
}

#examMarkBtn[aria-pressed="true"] {
  color: #92400e;
  border-color: #f59e0b;
  background: #fef3c7;
  box-shadow: 0 8px 20px rgba(245,158,11,.16);
}

.grid-btn.marked,
.grid-btn.done.marked,
.grid-btn.partial.marked,
.grid-btn.wrong.marked,
.grid-btn.current.marked,
.grid-btn.current.done.marked,
.grid-btn.current.partial.marked,
.grid-btn.current.wrong.marked {
  color: #713f12;
  border-color: #f59e0b;
  background: #fef3c7;
}

.grid-btn.current.marked,
.grid-btn.current.done.marked,
.grid-btn.current.partial.marked,
.grid-btn.current.wrong.marked {
  box-shadow: 0 0 0 3px rgba(245,158,11,.24);
}

@media (max-width: 767px) {
  .exam-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .exam-question-tools {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
    margin-left: 0;
  }

  .exam-question-tools .exam-tool-btn {
    width: 100%;
    min-width: 0;
    min-height: 36px;
    padding: 7px 8px;
    font-size: 12px;
  }
}

/* 2026-06 mobile import-mode fix: compact radio cards on narrow screens */
@media (max-width: 767px) {
  #tab-bank .import-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    margin: 10px 0 14px;
    width: 100%;
    max-width: 100%;
    overflow: visible;
  }

  #tab-bank .option-title {
    font-size: 14px;
    line-height: 1.35;
    margin-bottom: 2px;
  }

  #tab-bank .radio-card {
    width: 100%;
    min-height: auto;
    box-sizing: border-box;
    display: grid;
    grid-template-columns: 22px minmax(0, 1fr);
    align-items: start;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 12px;
    overflow: hidden;
  }

  #tab-bank .radio-card input {
    width: 18px;
    height: 18px;
    margin: 2px 0 0;
    flex: none;
  }

  #tab-bank .radio-card span {
    min-width: 0;
    display: block;
  }

  #tab-bank .radio-card strong {
    display: block;
    font-size: 14px;
    line-height: 1.35;
    white-space: normal;
  }

  #tab-bank .radio-card em {
    display: block;
    margin-top: 3px;
    font-size: 12px;
    line-height: 1.45;
    white-space: normal;
    word-break: normal;
    overflow-wrap: anywhere;
  }
}

.sync-status {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}
.sync-status.syncing {
  color: #2563eb;
}
.sync-status.failed {
  color: #b91c1c;
}


.question-import-workspace {
  display: grid;
  gap: 18px;
}
.import-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, .10), rgba(22, 163, 74, .08)),
    rgba(255, 255, 255, .96);
  border-color: #bfdbfe;
}
.import-hero h3 {
  margin: 10px 0 6px;
  font-size: 26px;
}
.import-flow {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
  justify-content: flex-end;
  color: #1e40af;
  font-size: 13px;
  font-weight: 900;
}
.import-flow span {
  padding: 8px 10px;
  border-radius: 999px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
}
.import-flow i {
  width: 22px;
  height: 2px;
  background: #93c5fd;
  display: inline-block;
}
.import-setup-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: stretch;
}
.import-upload-card,
.import-action-card {
  margin-bottom: 0;
  height: 100%;
  box-sizing: border-box;
}
.import-start-grid {
  grid-template-columns: minmax(240px, 1fr) minmax(260px, 1.2fr);
}
.import-ai-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: auto;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}
.import-ai-toggle input,
.inline-check input {
  width: auto;
  min-height: auto;
}
.import-summary {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0;
}
.import-stat {
  min-height: 72px;
  display: grid;
  justify-items: start;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 15px;
  color: var(--text);
  background: #fff;
  box-shadow: none;
}
.import-stat:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
  background: #fff;
}
.import-stat span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}
.import-stat strong {
  font-size: 24px;
  line-height: 1;
}
.import-stat.ready strong { color: var(--success); }
.import-stat.pending_review strong { color: var(--warning); }
.import-stat.failed strong { color: var(--danger); }
.import-stat.imported strong { color: var(--primary); }
.import-action-buttons {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.batch-repair-progress {
  margin-top: 8px;
  padding: 8px 12px;
  background: var(--warning-bg, #fff8e1);
  border: 1px solid var(--warning, #f0a000);
  border-radius: 6px;
  font-size: 0.9em;
  color: var(--warning, #b06000);
}
.batch-repair-progress.hidden { display: none; }
.import-preview-item.item-repairing {
  opacity: 0.85;
  border-left: 3px solid var(--primary, #2563eb);
}
.import-preview-item.item-repairing .import-status {
  animation: repairPulse 1.2s ease-in-out infinite;
}
@keyframes repairPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.import-preview-list {
  display: grid;
  gap: 14px;
}
.import-preview-item {
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255,255,255,.96);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.import-preview-item.pending_review { border-color: #fde68a; }
.import-preview-item.failed { border-color: #fecdd3; }
.import-preview-item.imported { border-color: #bbf7d0; }
.import-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  background: #f8fafc;
  border-bottom: 1px solid var(--border);
}
.import-title-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.import-status,
.import-type-pill,
.import-confidence {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
  background: #e2e8f0;
  color: #334155;
}
.import-status.ready,
.import-status.imported {
  color: #166534;
  background: #dcfce7;
}
.import-status.pending_review {
  color: #92400e;
  background: #fef3c7;
}
.import-status.failed {
  color: #b91c1c;
  background: #ffe4e6;
}
.import-type-pill {
  color: #1e40af;
  background: #dbeafe;
}
.import-confidence {
  color: #475569;
  background: #f1f5f9;
}
.pending-select {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: auto;
  color: #92400e;
  font-size: 13px;
  font-weight: 900;
}
.import-alerts {
  display: grid;
  gap: 8px;
  padding: 12px 16px 0;
}
.import-message,
.correction-box {
  padding: 10px 12px;
  border-radius: 13px;
  font-size: 13px;
  line-height: 1.6;
}
.import-message.ok {
  color: #166534;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
}
.import-message.warn {
  color: #b91c1c;
  background: #fff1f2;
  border: 1px solid #fecdd3;
}
.correction-box.applied {
  color: #14532d;
  background: #ecfdf5;
  border: 1px solid #bbf7d0;
}
.correction-box.suspected {
  color: #92400e;
  background: #fffbeb;
  border: 1px solid #fde68a;
}
.correction-box ul {
  margin: 6px 0 0 18px;
  padding: 0;
}
.correction-box li + li { margin-top: 4px; }
.correction-box span { color: var(--muted); }
.import-card-body {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(340px, .85fr);
  gap: 16px;
  padding: 16px;
}
.import-main-fields,
.import-side-fields {
  display: grid;
  gap: 12px;
  align-content: start;
}
.import-main-fields label,
.import-side-fields label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}
.import-mini-grid {
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 0;
}
.import-preview-item textarea {
  min-height: 92px;
  line-height: 1.6;
}
.import-preview-item .compact-textarea {
  min-height: 110px;
}
.import-preview-item .option-textarea {
  min-height: 226px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}
.raw-text-details {
  margin: 0 16px 14px;
  padding: 10px 12px;
  border-radius: 13px;
  background: #f8fafc;
  border: 1px solid var(--border);
}
.raw-text-details summary {
  cursor: pointer;
  color: var(--muted);
  font-weight: 900;
}
.import-card-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  padding: 0 16px 16px;
}
.empty-preview {
  padding: 22px;
  text-align: center;
}

@media (max-width: 1100px) {
  .import-setup-grid,
  .import-card-body {
    grid-template-columns: 1fr;
  }
  .import-summary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (max-width: 767px) {
  .import-hero,
  .import-card-head {
    align-items: flex-start;
    flex-direction: column;
  }
  .import-flow {
    justify-content: flex-start;
  }
  .import-flow i { display: none; }
  .import-start-grid,
  .import-mini-grid,
  .import-summary {
    grid-template-columns: 1fr;
  }
  .import-card-body,
  .import-alerts,
  .import-card-actions {
    padding-left: 12px;
    padding-right: 12px;
  }
  .raw-text-details {
    margin-left: 12px;
    margin-right: 12px;
  }
}



/* 2026-06 mobile answer bar distance polish: keep safe scroll room without large blank area */
@media (max-width: 767px) {
  :root {
    --mobile-answer-bar-height: 70px;
    --mobile-extra-bottom: 104px;
  }

  .main,
  #tab-practice {
    padding-bottom: calc(var(--mobile-extra-bottom) + env(safe-area-inset-bottom));
  }

  .question-card {
    padding-bottom: 22px;
    margin-bottom: 10px;
  }

  .answer-panel {
    margin-bottom: 6px;
    padding-bottom: 14px;
  }

  .question-card > .answer-actions {
    min-height: calc(var(--mobile-answer-bar-height) + env(safe-area-inset-bottom));
    padding-top: 7px;
    padding-bottom: calc(8px + env(safe-area-inset-bottom));
  }

  .question-card > .answer-actions button {
    min-height: 40px;
  }
}

/* 2026-06 mobile answer bar overlap fix: keep actions in document flow on phones */
@media (max-width: 767px) {
  :root {
    --mobile-answer-bar-height: 62px;
    --mobile-extra-bottom: 28px;
  }

  .main,
  #tab-practice {
    padding-bottom: calc(var(--mobile-extra-bottom) + env(safe-area-inset-bottom));
  }

  .question-card {
    padding-bottom: 12px;
    margin-bottom: 14px;
  }

  .options {
    padding-bottom: 0;
  }

  .answer-panel {
    margin-bottom: 10px;
    padding-bottom: 14px;
  }

  .question-card > .answer-actions {
    position: sticky !important;
    left: auto;
    right: auto;
    bottom: env(safe-area-inset-bottom);
    min-height: auto;
    margin: 14px -6px -4px;
    padding: 8px 6px calc(8px + env(safe-area-inset-bottom));
    border-radius: 16px;
    box-shadow: 0 -4px 18px rgba(15, 23, 42, .08);
  }

  .question-card > .answer-actions button {
    min-height: 40px;
  }
}

/* Question import cleanup controls */
.import-file-actions {
  align-items: center;
  flex-wrap: wrap;
}
.import-clear-btn {
  border-color: #fecdd3;
  color: #be123c;
  background: #fff1f2;
}
.import-clear-btn:hover {
  border-color: #fb7185;
  color: #9f1239;
  background: #ffe4e6;
}

/* Question editor and practice count improvements */
.practice-count-hint {
  display: block;
  margin-top: -2px;
  font-size: 12px;
  font-weight: 700;
  color: #94a3b8;
  line-height: 1.35;
}
#practiceCount::placeholder {
  color: #94a3b8;
}
.question-edit-card {
  width: min(820px, 100%);
  max-height: min(90vh, 820px);
  overflow: auto;
}
.question-edit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}
.question-edit-grid label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}
.question-edit-grid .full {
  grid-column: 1 / -1;
}
.question-edit-grid textarea {
  resize: vertical;
  min-height: 92px;
}
.edit-answer-field small {
  color: #64748b;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
}
.edit-answer-choices {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}
.edit-answer-choice {
  width: 100%;
  min-width: 0;
  min-height: 46px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 9px;
  padding: 8px 10px;
  text-align: left;
}
.edit-answer-choice strong {
  flex: 0 0 auto;
  width: 27px;
  height: 27px;
  display: inline-grid;
  place-items: center;
  border-radius: 9px;
  color: #2563eb;
  background: #eff6ff;
}
.edit-answer-choice span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #334155;
}
.edit-answer-choice.selected {
  color: #fff;
  border-color: #4f7cff;
  background: linear-gradient(135deg, #4f7cff, #7c3aed);
  box-shadow: 0 8px 20px rgba(79,124,255,.18);
}
.edit-answer-choice.selected strong {
  color: #fff;
  background: rgba(255,255,255,.18);
}
.edit-answer-choice.selected span { color: #fff; }
.edit-answer-choice:disabled { opacity: .42; }
#editQuestionBtn, #deleteQuestionBtn {
  white-space: nowrap;
}
.question-note-card {
  width: min(680px, 100%);
  max-height: min(90vh, 760px);
  overflow: auto;
}
.question-note-field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}
.question-note-field textarea {
  min-height: 180px;
  resize: vertical;
  line-height: 1.65;
  font-weight: 400;
}
.question-note-clear-status {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}
.question-note-actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.question-note-actions:has(#deleteQuestionNoteBtn.hidden) { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.question-note-actions button {
  width: 100%;
  min-width: 0;
  height: 44px;
  min-height: 44px;
  padding: 0 10px;
  margin: 0;
  border-radius: 12px;
  box-sizing: border-box;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
}
@media (max-width: 767px) {
  .question-note-actions,
  .question-note-actions:has(#deleteQuestionNoteBtn.hidden) { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .question-note-actions:has(#deleteQuestionNoteBtn.hidden) #closeQuestionNoteBtn { grid-column: 1 / -1; }
}
body.notes-modal-open { overflow: hidden; }
#questionNoteModal { z-index: 22; }
.modal-card.note-question-card {
  width: min(860px, 100%);
  max-height: min(90dvh, 1000px);
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: #fff;
}
.note-detail-header, .note-detail-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  gap: 16px;
  padding: 20px 24px;
}
.note-detail-header { border-bottom: 1px solid var(--border); }
.note-detail-header > div { min-width: 0; }
.note-detail-header button { flex-shrink: 0; }
.note-detail-header h3 { margin: 0; font-size: 20px; }
.note-detail-header p { margin: 0 0 5px; font-size: 12px; overflow-wrap: anywhere; }
.note-detail-body {
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 24px;
  line-height: 1.75;
  overflow-wrap: anywhere;
}
.note-detail-meta { display: flex; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: 12px; }
.note-detail-stem { margin: 14px 0 20px; font-size: 18px; white-space: pre-wrap; }
.note-detail-options { display: grid; gap: 10px; margin-bottom: 20px; }
.note-detail-option { display: flex; align-items: flex-start; gap: 12px; border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.note-detail-option > strong { color: var(--primary); }
.note-detail-option > div { min-width: 0; white-space: pre-wrap; }
.note-detail-body .question-images { grid-template-columns: minmax(0, 1fr); }
.note-detail-body .question-images img { width: auto; max-width: 100%; margin-inline: auto; }
.note-detail-answer, .note-detail-note { padding: 16px; border-radius: 14px; background: #f4f7fc; }
.note-detail-answer { background: #f0faf5; }
.note-detail-note { margin-top: 16px; }
.note-detail-answer h4, .note-detail-note h4 { margin: 0 0 8px; font-size: 15px; }
.note-detail-note p { margin: 0; white-space: pre-wrap; }
.note-detail-answer .muted { margin: 12px 0 0; font-size: 12px; }
.note-detail-state { padding: 32px 0; text-align: center; color: var(--muted); }
.note-detail-footer { justify-content: flex-end; border-top: 1px solid var(--border); background: #fff; }
.note-detail-footer button { min-height: 44px; }
@media (max-width: 640px) {
  #noteQuestionModal { padding: 10px; }
  .modal-card.note-question-card { max-height: calc(100dvh - 20px); border-radius: 20px; }
  .note-detail-header, .note-detail-footer { padding: 14px 16px; gap: 10px; }
  .note-detail-body { padding: 18px 16px; }
  .note-detail-stem { font-size: 17px; }
  .note-detail-footer button { flex: 1; padding-inline: 10px; }
}
.notes-page { display: grid; gap: 18px; }
.notes-toolbar {
  display: grid;
  grid-template-columns: minmax(180px, .7fr) minmax(260px, 1.3fr);
  gap: 12px;
}
.notes-toolbar label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}
.notes-export-toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 18px; padding: 14px 0; border-top: 1px solid #e7ecf3; border-bottom: 1px solid #e7ecf3; }
.notes-export-select-all { display: inline-flex; align-items: center; gap: 8px; margin: 0; font-size: 13px; font-weight: 600; cursor: pointer; }
.notes-export-toolbar input[type="checkbox"], .note-export-check input[type="checkbox"], .notes-export-extra input[type="checkbox"] { flex: 0 0 18px; width: 18px; height: 18px; margin: 0; padding: 0; accent-color: #3b63e8; }
#notesExportSelection { font-size: 12px; color: #64748b; }
.notes-export-actions { display: flex; gap: 8px; margin-left: auto; }
.notes-export-actions button { min-width: 98px; min-height: 40px; margin: 0; font-size: 13px; }
.note-export-check { display: inline-flex; align-items: center; justify-content: center; min-width: 28px; min-height: 28px; margin: 0; cursor: pointer; }
.notes-export-dialog { width: min(1100px, calc(100vw - 32px)); max-width: none; height: min(940px, calc(100dvh - 40px)); max-height: calc(100dvh - 40px); padding: 0; border: 1px solid #e2e8f0; border-radius: 18px; color: #182235; background: #fff; box-shadow: 0 25px 80px #10182740; }
.notes-export-dialog[open] { display: flex; flex-direction: column; }
.notes-export-dialog::backdrop { background: #10182780; }
.notes-export-heading { display: flex; align-items: center; justify-content: space-between; padding: 18px 24px 12px; gap: 16px; }
.notes-export-heading h3 { margin: 0; font-size: 20px; }
.notes-export-heading p { margin: 5px 0 0; color: #64748b; font-size: 12px; }
.notes-export-dialog .notes-export-close { flex: 0 0 40px; width: 40px; min-width: 40px; height: 40px; margin: 0; padding: 0; font-size: 24px; border-radius: 10px; }
.notes-export-settings { display: grid; grid-template-columns: minmax(200px, 2fr) minmax(240px, 2fr) 1fr 1fr; gap: 12px; padding: 10px 24px 16px; }
.notes-export-settings label { display: flex; flex-direction: column; gap: 6px; margin: 0; color: #57677f; font-size: 12px; font-weight: 500; }
.notes-export-settings input:not([type="checkbox"]), .notes-export-settings select { width: 100%; min-width: 0; height: 40px; margin: 0; font-size: 13px; }
.notes-export-settings .notes-export-extra { flex-direction: row; align-items: center; align-self: end; gap: 8px; min-height: 40px; }
.notes-export-status-row { display: flex; align-items: center; gap: 12px; padding: 0 24px 12px; }
.notes-export-status-row p { margin: 0; font-size: 12px; color: #64748b; }
.notes-export-status-row button { margin: 0; min-height: 32px; padding: 6px 12px; font-size: 12px; }
#notesExportPreview { display: block; flex: 1; min-height: 140px; width: 100%; border: 0; border-top: 1px solid #e2e8f0; background: #eef1f5; }
.notes-export-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 14px 24px; border-top: 1px solid #e2e8f0; }
.notes-export-footer > span { font-size: 12px; color: #64748b; }
.notes-export-footer > div { display: flex; gap: 10px; }
.notes-export-footer button { min-height: 44px; min-width: 144px; margin: 0; font-size: 14px; }
@media (max-width: 767px) {
  .notes-export-toolbar { gap: 10px; }
  .notes-export-actions { width: 100%; margin: 0; }
  .notes-export-actions button { flex: 1; }
  .notes-export-dialog { width: 100%; height: 100dvh; max-height: 100dvh; max-width: 100%; margin: 0; border-radius: 0; border: 0; }
  .notes-export-heading { padding: 14px 16px 8px; }
  .notes-export-settings { grid-template-columns: 1fr 1fr; gap: 8px; padding: 8px 16px; }
  .notes-export-name, .notes-export-settings label:nth-child(2) { grid-column: 1 / -1; }
  .notes-export-settings input:not([type="checkbox"]), .notes-export-settings select { height: 36px; }
  .notes-export-status-row { padding: 4px 16px 8px; }
  .notes-export-footer { padding: 10px 16px max(10px, env(safe-area-inset-bottom)); }
  .notes-export-footer > div { width: 100%; }
  .notes-export-footer button { flex: 1; min-width: 0; }
}
.notes-list { display: grid; gap: 14px; }
.wrong-redo-notice { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 16px; padding: 18px 20px; border: 1px solid #cbdafa; border-radius: 16px; background: #f4f7ff; color: #263c65; }
.wrong-redo-notice[hidden] { display: none; }
.wrong-redo-notice strong { font-size: 15px; }
.wrong-redo-notice p { margin: 6px 0 0; font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; }
.wrong-redo-notice button { flex: 0 0 auto; min-width: 140px; min-height: 44px; margin: 0; white-space: nowrap; }
.wrong-redo-dialog { width: min(520px, calc(100vw - 32px)); padding: 24px; border: 1px solid #e0e6ef; border-radius: 20px; color: #182235; background: #fff; box-shadow: 0 24px 80px #10182740; }
.wrong-redo-dialog::backdrop { background: #10182780; }
.wrong-redo-dialog header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.wrong-redo-dialog h3 { margin: 0; font-size: 20px; }
.wrong-redo-dialog .wrong-resume-close { flex: 0 0 36px; width: 36px; min-width: 36px; height: 36px; padding: 0; margin: 0; font-size: 23px; border-radius: 10px; }
.wrong-resume-source { margin: 18px 0 8px; font-weight: 600; overflow-wrap: anywhere; }
.wrong-resume-detail { margin: 0; color: #365de0; font-variant-numeric: tabular-nums; }
.wrong-resume-hint { margin: 18px 0; color: #64748b; font-size: 13px; line-height: 1.8; }
.wrong-resume-error { color: #b45309; font-size: 13px; line-height: 1.7; }
.wrong-redo-dialog footer { display: flex; gap: 12px; margin-top: 22px; }
.wrong-redo-dialog footer button { flex: 1; min-width: 0; min-height: 44px; margin: 0; padding: 10px 8px; font-size: 14px; white-space: nowrap; }
@media (max-width: 767px) {
  .wrong-redo-notice { align-items: stretch; flex-direction: column; gap: 12px; padding: 16px; }
  .wrong-redo-notice button { width: 100%; }
  .wrong-redo-dialog { padding: 20px; }
}
.note-card {
  display: grid;
  gap: 10px;
  padding: 17px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255,255,255,.88);
  overflow-wrap: anywhere;
}
.note-card h4, .note-card p { margin: 0; line-height: 1.65; }
.note-card p { white-space: pre-wrap; }
.note-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}
.note-card-meta span, .note-card-meta time {
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--primary-soft);
}
.note-card-meta .note-card-number {
  min-width: 32px;
  padding: 5px 8px;
  border: 1px solid #cfddff;
  border-radius: 8px;
  background: #edf3ff;
  color: #315bd6;
  font-size: 14px;
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
  text-align: center;
  flex-shrink: 0;
}
.notes-empty {
  margin: 0;
  padding: 28px 18px;
  border: 1px dashed var(--border);
  border-radius: 18px;
  color: var(--muted);
  text-align: center;
  line-height: 1.7;
}
.list-pager {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  padding: 10px 0 2px;
  color: var(--muted);
  font-weight: 800;
}
.notes-pager { gap: 12px 24px; }
.notes-page-nav, .notes-page-jump {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 0;
  white-space: nowrap;
}
.notes-pager button, .notes-page-jump input {
  height: 44px;
  min-height: 44px;
  border-radius: 12px;
}
.notes-pager button { padding: 8px 16px; }
.notes-page-jump input {
  width: 64px;
  min-width: 0;
  padding: 8px;
  text-align: center;
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}
@media (max-width: 767px) {
  .notes-pager { flex-direction: column; }
  .notes-page-nav { gap: 8px; }
  .notes-page-nav button { padding-inline: 12px; }
}
.performance-diagnostics-panel {
  position: fixed;
  left: 12px;
  bottom: max(12px, env(safe-area-inset-bottom));
  z-index: 32;
  display: flex;
  flex-direction: column;
  width: min(520px, calc(100vw - 24px));
  max-height: 60vh;
  max-height: 60dvh;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(15, 23, 42, .94);
  color: #fff;
  box-shadow: var(--shadow);
  font-size: 12px;
}
.performance-diagnostics-header {
  display: flex;
  flex-shrink: 0;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255,255,255,.16);
}
.performance-diagnostics-header h3 { margin: 0; color: #fff; font-size: 16px; }
.performance-diagnostics-header button {
  flex-shrink: 0;
  min-width: 64px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid #64748b;
  border-radius: 8px;
  background: #334155;
  color: #fff;
  box-shadow: none;
}
.performance-diagnostics-header button:hover { background: #475569; transform: none; }
.performance-diagnostics-header button:focus-visible { outline: 2px solid #93c5fd; outline-offset: 2px; }
.performance-diagnostics-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 10px 14px;
  min-height: 0;
  margin: 0;
  padding: 14px;
  overflow: auto;
  overscroll-behavior: contain;
  overflow-wrap: anywhere;
}
.performance-diagnostics-metrics dt { font-weight: 600; }
.performance-diagnostics-metrics dd { margin: 0; }
.mobile-heavy-task-hint {
  display: none;
  margin: 10px 0 0;
  color: #92400e;
  font-size: 13px;
  line-height: 1.6;
}
@media (max-width: 767px) {
  .question-edit-card {
    width: 100%;
    max-height: 92vh;
    border-radius: 18px;
    padding: 18px;
  }
  .question-edit-grid {
    grid-template-columns: 1fr;
  }
  .edit-answer-choices {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .option-edit-row {
    grid-template-columns: 1fr;
  }
  .question-note-card {
    width: 100%;
    max-height: calc(100vh - env(safe-area-inset-top));
    padding: 18px 16px calc(18px + env(safe-area-inset-bottom));
  }
  .source-manager-toolbar {
    grid-template-columns: 1fr 1fr;
  }
  .source-manager-toolbar input {
    grid-column: 1 / -1;
  }
  .source-manager-footer {
    display: grid;
    grid-template-columns: 1fr;
  }
  .source-manager-footer button {
    width: 100%;
  }
  .question-note-field textarea { min-height: 150px; max-height: 38vh; }
  .notes-toolbar { grid-template-columns: 1fr; }
  .note-card { padding: 15px; }
  /* Keep the notes navigation reachable while reading a long list. Hidden
     overflow creates a body scroll container that breaks the sticky header. */
  body:has(#tab-notes.active) { overflow-x: clip; }
  .note-card .list-row-actions { display: grid; grid-template-columns: 1fr; }
  .mobile-heavy-task-hint { display: block; }
  .question-card > .answer-actions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    min-height: calc(116px + env(safe-area-inset-bottom));
  }
  .question-card > .answer-actions button {
    min-height: 38px;
  }
}

@media (prefers-reduced-motion: reduce), (max-width: 767px) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .001ms !important;
  }
  .topbar,
  .card,
  .modal-card,
  .answer-card-sheet,
  .toast {
    backdrop-filter: none !important;
  }
}

/* Practice toolbar layout correction */
#tab-practice .practice-toolbar {
  display: grid;
  grid-template-columns: minmax(150px, .9fr) minmax(190px, 1.1fr) minmax(130px, .75fr) minmax(130px, .65fr) minmax(240px, 1.45fr) auto;
  gap: 12px;
  align-items: end;
  padding: 18px 20px 16px;
}
#tab-practice .practice-toolbar label {
  min-width: 0;
  gap: 6px;
}
#tab-practice .practice-toolbar select,
#tab-practice .practice-toolbar input {
  width: 100%;
  min-height: 44px;
  height: 44px;
}
#tab-practice .practice-toolbar .practice-count-field input {
  text-align: left;
}
#tab-practice .practice-toolbar #buildPracticeBtn {
  min-width: 128px;
  height: 44px;
  margin: 0;
  white-space: nowrap;
}
#tab-practice .practice-toolbar .practice-count-hint {
  grid-column: 1 / -1;
  display: block;
  min-height: 0;
  margin: -2px 0 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: #64748b;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
}
#tab-practice .practice-toolbar .practice-count-hint::before {
  content: "数量说明：";
  color: #334155;
}

@media (max-width: 1280px) {
  #tab-practice .practice-toolbar {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  #tab-practice .practice-toolbar .practice-search-field {
    grid-column: 1 / span 3;
  }
  #tab-practice .practice-toolbar #buildPracticeBtn {
    width: 100%;
  }
}

@media (max-width: 767px) {
  #tab-practice .practice-toolbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin: 0 0 10px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: none;
    background: rgba(255,255,255,.94);
  }
  #tab-practice .practice-toolbar .practice-search-field,
  #tab-practice .practice-toolbar #buildPracticeBtn,
  #tab-practice .practice-toolbar .practice-count-hint {
    grid-column: 1 / -1;
  }
  #tab-practice .practice-toolbar .practice-count-hint {
    font-size: 11px;
  }
}

/* =========================================================
   2026-06 Premium UI Redesign
   目标：让刷题软件从“工具页”升级为“学习控制台”视觉层级。
   说明：不改业务逻辑、不改 DOM ID，仅重塑布局、卡片、导航、题目区与移动端体验。
   ========================================================= */
:root {
  --bg: #eef3fb;
  --panel: rgba(255, 255, 255, 0.86);
  --panel-solid: #ffffff;
  --panel-soft: #f7faff;
  --text: #0b1220;
  --muted: #64748b;
  --subtle: #94a3b8;
  --border: rgba(148, 163, 184, 0.26);
  --line: rgba(148, 163, 184, 0.22);
  --border-strong: rgba(100, 116, 139, 0.34);
  --primary: #3b82f6;
  --primary-dark: #1d4ed8;
  --primary-soft: #eaf2ff;
  --primary-glow: rgba(59, 130, 246, 0.30);
  --accent: #8b5cf6;
  --accent-2: #06b6d4;
  --danger: #ef4444;
  --danger-soft: #fff1f2;
  --success: #10b981;
  --success-soft: #ecfdf5;
  --warning: #f59e0b;
  --warning-soft: #fffbeb;
  --shadow: 0 26px 80px rgba(15, 23, 42, 0.16);
  --shadow-soft: 0 18px 52px rgba(15, 23, 42, 0.09);
  --shadow-card: 0 12px 34px rgba(15, 23, 42, 0.075);
  --radius: 24px;
  --radius-lg: 32px;
}

html {
  min-height: 100%;
  background: #0f172a;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 8% 8%, rgba(59, 130, 246, 0.20), transparent 28%),
    radial-gradient(circle at 72% 0%, rgba(139, 92, 246, 0.22), transparent 30%),
    radial-gradient(circle at 96% 42%, rgba(6, 182, 212, 0.14), transparent 26%),
    linear-gradient(135deg, #f8fbff 0%, #eef4fb 42%, #e9eef8 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before,
body::after {
  content: "";
  position: fixed;
  pointer-events: none;
  z-index: -1;
}

body::before {
  inset: 0;
  opacity: 0.40;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.035) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.85), transparent 72%);
}

body::after {
  width: 520px;
  height: 520px;
  right: -180px;
  top: 140px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(59, 130, 246, .22), rgba(139, 92, 246, .08) 42%, transparent 68%);
  filter: blur(8px);
}

button,
input,
select,
textarea {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

button {
  border: 1px solid rgba(255,255,255,.28);
  background:
    linear-gradient(135deg, rgba(255,255,255,.18), rgba(255,255,255,0) 42%),
    linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 15px;
  font-weight: 900;
  letter-spacing: .015em;
  box-shadow: 0 16px 32px rgba(59, 130, 246, .25), inset 0 1px 0 rgba(255,255,255,.25);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, filter .18s ease, background .18s ease;
}

button:hover {
  background:
    linear-gradient(135deg, rgba(255,255,255,.20), rgba(255,255,255,0) 42%),
    linear-gradient(135deg, #2563eb, #7c3aed);
  transform: translateY(-2px);
  box-shadow: 0 20px 42px rgba(59, 130, 246, .32), inset 0 1px 0 rgba(255,255,255,.28);
  filter: saturate(1.05);
}

button:active { transform: translateY(0); }
button:disabled { opacity: .46; transform: none; box-shadow: none; filter: none; }

button.ghost {
  color: #1e3a8a;
  background: rgba(239, 246, 255, .84);
  border: 1px solid rgba(147, 197, 253, .46);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.85), 0 8px 20px rgba(15,23,42,.04);
}

button.ghost:hover {
  color: #1d4ed8;
  background: #ffffff;
  border-color: rgba(59, 130, 246, .38);
  box-shadow: 0 14px 30px rgba(37, 99, 235, .12);
}

button.danger {
  background:
    linear-gradient(135deg, rgba(255,255,255,.16), transparent 42%),
    linear-gradient(135deg, #f43f5e, #dc2626);
  box-shadow: 0 16px 32px rgba(225, 29, 72, .22);
}

button.danger.ghost {
  color: #be123c;
  background: rgba(255, 241, 242, .92);
  border-color: rgba(251, 113, 133, .36);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.82);
}

input,
select,
textarea {
  min-height: 46px;
  border: 1px solid rgba(148, 163, 184, .32);
  border-radius: 15px;
  padding: 11px 13px;
  background: rgba(255, 255, 255, .78);
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.7), 0 1px 2px rgba(15,23,42,.03);
}

input:hover,
select:hover,
textarea:hover {
  border-color: rgba(59, 130, 246, .36);
  background: rgba(255,255,255,.92);
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(59, 130, 246, .72);
  background: #fff;
  box-shadow: 0 0 0 5px rgba(59, 130, 246, .12), 0 10px 28px rgba(15,23,42,.06);
}

input::placeholder,
textarea::placeholder { color: #a0aec0; }

select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, #64748b 50%),
    linear-gradient(135deg, #64748b 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 3px),
    calc(100% - 13px) calc(50% - 3px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 34px;
}

.app-shell {
  grid-template-columns: 304px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 24px 20px 22px;
  background:
    radial-gradient(circle at 28% 0%, rgba(59, 130, 246, .24), transparent 32%),
    radial-gradient(circle at 96% 28%, rgba(139, 92, 246, .18), transparent 36%),
    linear-gradient(180deg, #0b1220 0%, #101827 48%, #111827 100%);
  border-right: 1px solid rgba(255,255,255,.08);
  box-shadow: 18px 0 60px rgba(15, 23, 42, .16);
  scrollbar-width: thin;
  scrollbar-color: rgba(148, 163, 184, .42) transparent;
}

.sidebar::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,.06), transparent 22%);
}

.sidebar > * { position: relative; }

.brand {
  margin-bottom: 24px;
  padding: 12px;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 22px;
  background: rgba(255,255,255,.055);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}

.brand-icon {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(255,255,255,.18), transparent 48%),
    linear-gradient(135deg, #38bdf8 0%, #3b82f6 45%, #8b5cf6 100%);
  color: #fff;
  box-shadow: 0 18px 36px rgba(59, 130, 246, .33);
}

.brand h1 {
  font-size: 22px;
  letter-spacing: .03em;
}

.brand::after {
  content: "PRO";
  margin-left: auto;
  padding: 4px 8px;
  border-radius: 999px;
  color: #bfdbfe;
  background: rgba(59, 130, 246, .15);
  border: 1px solid rgba(147, 197, 253, .20);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .11em;
}

.mobile-menu-btn { color: #dbeafe; }

.nav {
  gap: 9px;
  margin-bottom: 22px;
}

.nav-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 11px 13px;
  overflow: hidden;
  color: #aebdd2;
  background: rgba(255,255,255,.045);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 16px;
  box-shadow: none;
}

.nav-btn::before {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  flex: 0 0 28px;
  border-radius: 10px;
  color: #dbeafe;
  background: rgba(255,255,255,.08);
  font-size: 13px;
  font-weight: 900;
}

.nav-btn:nth-child(1)::before { content: "练"; }
.nav-btn:nth-child(2)::before { content: "考"; }
.nav-btn:nth-child(3)::before { content: "错"; }
.nav-btn:nth-child(4)::before { content: "记"; }
.nav-btn:nth-child(5)::before { content: "库"; }
.nav-btn:nth-child(6)::before { content: "统"; }
.nav-btn:nth-child(7)::before { content: "云"; }

.nav-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  background: linear-gradient(90deg, rgba(59,130,246,.20), rgba(139,92,246,.16));
  transition: opacity .18s ease;
}

.nav-btn:hover,
.nav-btn.active {
  color: #fff;
  background: rgba(59,130,246,.14);
  border-color: rgba(147,197,253,.28);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.10), 0 14px 28px rgba(15,23,42,.20);
  transform: translateY(-1px);
}

.nav-btn:hover::after,
.nav-btn.active::after { opacity: 1; }
.nav-btn > * { position: relative; }
.nav-btn.active::before {
  color: #fff;
  background: linear-gradient(135deg, #38bdf8, #3b82f6 46%, #8b5cf6);
  box-shadow: 0 8px 18px rgba(59,130,246,.30);
}

.side-card {
  padding: 16px;
  border-radius: 22px;
  background: rgba(255,255,255,.065);
  border: 1px solid rgba(255,255,255,.09);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.07), 0 14px 28px rgba(0,0,0,.08);
}

.side-card + .side-card { margin-top: 16px; }

.bank-switcher p,
.account-card p,
.account-card label,
.mini-stat span { color: #b8c7da; }

.bank-switcher select,
.account-card input,
.account-card select {
  background-color: rgba(15,23,42,.52);
  border-color: rgba(148,163,184,.22);
  color: #f8fafc;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
}

.bank-switcher select:focus,
.account-card input:focus,
.account-card select:focus {
  background-color: rgba(15,23,42,.75);
  border-color: rgba(96,165,250,.64);
  box-shadow: 0 0 0 4px rgba(59,130,246,.14);
}

.account-card input::placeholder { color: #7f90a7; }

.mini-stat {
  min-height: 46px;
  padding: 10px 0;
  border-color: rgba(255,255,255,.08);
}

.mini-stat strong {
  color: #fff;
  font-size: 20px;
  letter-spacing: -.02em;
}

.account-card .config-hint { color: #fde68a; }

.main {
  max-width: 1540px;
  width: 100%;
  padding: 30px 32px 56px;
}

.topbar {
  position: relative;
  overflow: hidden;
  min-height: 172px;
  margin-bottom: 22px;
  padding: 26px 28px;
  align-items: center;
  border: 1px solid rgba(255,255,255,.66);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(255,255,255,.92), rgba(255,255,255,.70)),
    radial-gradient(circle at 88% 14%, rgba(59,130,246,.24), transparent 38%),
    radial-gradient(circle at 60% 0%, rgba(139,92,246,.15), transparent 34%);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px) saturate(1.20);
}

.topbar::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  right: -120px;
  top: -190px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(59,130,246,.26), rgba(139,92,246,.14) 46%, transparent 68%);
}

.topbar::after {
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  right: 34px;
  bottom: -62px;
  border-radius: 36px;
  border: 1px solid rgba(59,130,246,.18);
  background: rgba(255,255,255,.36);
  transform: rotate(18deg);
}

.topbar > * { position: relative; z-index: 1; }

.topbar-copy { max-width: 780px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  padding: 6px 11px;
  border-radius: 999px;
  color: #1e40af;
  background: rgba(239, 246, 255, .84);
  border: 1px solid rgba(147, 197, 253, .48);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: #22c55e;
  box-shadow: 0 0 0 5px rgba(34,197,94,.12);
}

.topbar h2 {
  font-size: clamp(30px, 3.4vw, 48px);
  line-height: 1.06;
  letter-spacing: -.045em;
  color: #08111f;
}

.topbar p {
  max-width: 740px;
  margin-top: 12px;
  color: #546179;
  font-size: 15px;
  line-height: 1.72;
}

.topbar-visual {
  display: grid;
  grid-template-columns: repeat(3, minmax(86px, 1fr));
  gap: 10px;
  min-width: 320px;
  align-self: stretch;
  align-content: end;
}

.top-metric {
  min-height: 96px;
  display: grid;
  align-content: end;
  gap: 8px;
  padding: 14px;
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,.72);
  background: rgba(255,255,255,.54);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.68), 0 12px 26px rgba(15,23,42,.07);
  backdrop-filter: blur(12px);
}

.top-metric:nth-child(2) { transform: translateY(-14px); }
.top-metric span {
  color: #64748b;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .10em;
  text-transform: uppercase;
}
.top-metric strong {
  color: #0f172a;
  font-size: 22px;
  letter-spacing: -.04em;
}

.card,
.import-preview-item {
  position: relative;
  border: 1px solid rgba(255,255,255,.70);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px) saturate(1.18);
}

.card::before,
.import-preview-item::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.72);
}

.card > *,
.import-preview-item > * { position: relative; }

.card > h3,
.exam-setup h3,
.section-head h3,
.import-upload-card h3,
.import-action-card h3 {
  color: #0f172a;
  letter-spacing: -.02em;
}

.muted { color: #64748b; }

.toolbar,
#tab-practice .practice-toolbar {
  position: relative;
  overflow: hidden;
  padding: 22px 22px 18px;
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,.74);
  background:
    linear-gradient(135deg, rgba(255,255,255,.92), rgba(248,250,252,.75)),
    radial-gradient(circle at 0% 0%, rgba(59,130,246,.10), transparent 34%);
  box-shadow: var(--shadow-card);
}

#tab-practice .practice-toolbar::before {
  content: "练习控制台";
  grid-column: 1 / -1;
  width: fit-content;
  margin-bottom: 0;
  padding: 5px 10px;
  border-radius: 999px;
  color: #1e40af;
  background: rgba(239, 246, 255, .86);
  border: 1px solid rgba(147,197,253,.44);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .05em;
}

.toolbar label,
.form-grid label,
.question-edit-grid label,
.import-main-fields label,
.import-side-fields label,
.bank-manager-grid label {
  color: #56657a;
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .025em;
}

.practice-count-hint {
  color: #7b8798;
}

.question-layout {
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 22px;
  align-items: start;
}

.question-card {
  overflow: hidden;
  min-height: 520px;
  padding: 26px;
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,255,255,.80)),
    radial-gradient(circle at 8% 4%, rgba(59,130,246,.12), transparent 30%);
}

.question-card::after {
  content: "";
  position: absolute;
  pointer-events: none;
  width: 170px;
  height: 170px;
  right: -70px;
  top: -78px;
  border-radius: 54px;
  background: linear-gradient(135deg, rgba(59,130,246,.13), rgba(139,92,246,.08));
  transform: rotate(20deg);
}

.question-card h3,
.exam-running h3 {
  color: #0b1220;
  font-size: clamp(21px, 1.7vw, 28px);
  font-weight: 850;
  line-height: 1.68;
  letter-spacing: -.018em;
}

.question-meta {
  gap: 10px;
  margin-bottom: 16px;
}

.question-meta span,
.pill,
.tag {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(239,246,255,.92);
  border: 1px solid rgba(147,197,253,.38);
  color: #1e3a8a;
  font-size: 12px;
  font-weight: 950;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.8);
}

.options {
  gap: 13px;
}

.option {
  position: relative;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  min-height: 62px;
  padding: 16px 16px;
  overflow: hidden;
  border-radius: 19px;
  border: 1px solid rgba(148,163,184,.25);
  background: rgba(255,255,255,.72);
  box-shadow: 0 8px 22px rgba(15,23,42,.045), inset 0 1px 0 rgba(255,255,255,.72);
  line-height: 1.64;
}

.option::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  background: linear-gradient(90deg, rgba(59,130,246,.08), rgba(139,92,246,.05));
  transition: opacity .18s ease;
}

.option:hover {
  transform: translateY(-2px);
  border-color: rgba(59,130,246,.44);
  background: #fff;
  box-shadow: 0 14px 30px rgba(37,99,235,.09), inset 0 1px 0 rgba(255,255,255,.82);
}

.option:hover::before { opacity: 1; }
.option > * { position: relative; }

.option-key {
  width: 36px;
  height: 36px;
  border-radius: 14px;
  border: 1px solid rgba(148,163,184,.34);
  color: #2563eb;
  background: linear-gradient(180deg, #fff, #f8fafc);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.92);
}

.option.selected {
  border-color: rgba(59,130,246,.72);
  background: linear-gradient(135deg, rgba(239,246,255,.98), rgba(245,243,255,.82));
  box-shadow: 0 18px 34px rgba(59,130,246,.14), inset 0 1px 0 rgba(255,255,255,.88);
}

.option.selected .option-key {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  box-shadow: 0 9px 18px rgba(59,130,246,.24);
}

.option.correct {
  border-color: rgba(16,185,129,.50);
  background: linear-gradient(135deg, rgba(236,253,245,.96), rgba(255,255,255,.82));
}

.option.correct .option-key {
  background: linear-gradient(135deg, #10b981, #059669);
}

.option.partial {
  border-color: rgba(217,119,6,.42);
  background: linear-gradient(135deg, rgba(255,251,235,.98), rgba(255,255,255,.82));
}

.option.partial .option-key {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.option.wrong {
  border-color: rgba(244,63,94,.48);
  background: linear-gradient(135deg, rgba(255,241,242,.96), rgba(255,255,255,.82));
}

.option.wrong .option-key {
  background: linear-gradient(135deg, #f43f5e, #dc2626);
}

.answer-actions {
  gap: 11px;
  margin-top: 22px;
}

.answer-panel {
  margin-top: 20px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid rgba(148,163,184,.22);
  background: rgba(248,250,252,.74);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.72);
}

.answer-panel.correct {
  border-color: rgba(16,185,129,.34);
  background: linear-gradient(135deg, rgba(236,253,245,.96), rgba(255,255,255,.80));
}

.answer-panel.partial {
  border-color: rgba(217,119,6,.34);
  background: linear-gradient(135deg, rgba(255,251,235,.96), rgba(255,255,255,.80));
}

.answer-panel.wrong {
  border-color: rgba(244,63,94,.34);
  background: linear-gradient(135deg, rgba(255,241,242,.96), rgba(255,255,255,.80));
}

.progress-card {
  top: 24px;
  padding: 22px;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,255,255,.70)),
    radial-gradient(circle at 100% 0%, rgba(6,182,212,.12), transparent 30%);
}

.progress-card h3 {
  margin-bottom: 12px;
  font-size: 20px;
  letter-spacing: -.03em;
}

.tip {
  border-radius: 18px;
  background: rgba(15,23,42,.045);
  border: 1px solid rgba(148,163,184,.18);
}

.question-grid {
  gap: 9px;
}

.grid-btn {
  width: 36px;
  height: 36px;
  min-height: 36px;
  border-radius: 13px;
  color: #334155;
  background: rgba(248,250,252,.85);
  border: 1px solid rgba(148,163,184,.28);
}

.grid-btn.current {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  box-shadow: 0 10px 20px rgba(59,130,246,.22);
}

.grid-btn.done {
  color: #047857;
  background: #ecfdf5;
  border-color: rgba(16,185,129,.34);
}

.grid-btn.partial {
  color: #92400e;
  background: #fffbeb;
  border-color: rgba(217,119,6,.32);
}

.grid-btn.wrong {
  color: #be123c;
  background: #fff1f2;
  border-color: rgba(244,63,94,.30);
}

.grid-btn.current.done,
.grid-btn.current.partial,
.grid-btn.current.wrong {
  box-shadow: 0 0 0 3px #bfdbfe;
}

.grid-btn.current.done {
  color: #047857;
  background: #ecfdf5;
  border-color: rgba(16,185,129,.34);
}

.grid-btn.current.partial {
  color: #92400e;
  background: #fffbeb;
  border-color: rgba(217,119,6,.32);
}

.grid-btn.current.wrong {
  color: #be123c;
  background: #fff1f2;
  border-color: rgba(244,63,94,.30);
}

.exam-setup,
.exam-running,
.stats-hero,
.import-hero {
  background:
    linear-gradient(135deg, rgba(255,255,255,.90), rgba(255,255,255,.72)),
    radial-gradient(circle at 100% 0%, rgba(59,130,246,.12), transparent 32%);
  border-color: rgba(255,255,255,.72);
}

.exam-header,
.section-head {
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(148,163,184,.16);
}

.timer {
  padding: 8px 13px;
  border-radius: 16px;
  color: #be123c;
  background: rgba(255,241,242,.92);
  border: 1px solid rgba(251,113,133,.28);
  font-size: 22px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.80);
}

.import-options,
.form-grid,
.import-grid,
.bank-manager-grid,
.stats-grid,
.stats-two-col {
  gap: 16px;
}

.radio-card,
.list-item,
.stat-card,
.import-stat,
.raw-text-details,
.saved-exam-box {
  border: 1px solid rgba(148,163,184,.22);
  background: rgba(255,255,255,.72);
  border-radius: 19px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.72), 0 8px 20px rgba(15,23,42,.045);
}

.radio-card {
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
.radio-card:hover {
  transform: translateY(-1px);
  border-color: rgba(59,130,246,.36);
  background: #fff;
  box-shadow: 0 12px 28px rgba(59,130,246,.08);
}
.radio-card:has(input:checked) {
  border-color: rgba(59,130,246,.48);
  background: linear-gradient(135deg, rgba(239,246,255,.96), rgba(255,255,255,.76));
}

.list-item h4 {
  color: #111827;
  font-weight: 850;
  letter-spacing: -.015em;
}

.stat-card {
  min-height: 114px;
  padding: 18px;
  overflow: hidden;
}

.stat-card::after {
  content: "";
  position: absolute;
  width: 92px;
  height: 92px;
  right: -38px;
  top: -42px;
  border-radius: 999px;
  background: rgba(59,130,246,.10);
}

.stat-card span {
  color: #64748b;
  font-weight: 950;
}

.stat-card strong {
  color: #0f172a;
  font-size: 30px;
  letter-spacing: -.045em;
}

.progress-line {
  height: 9px;
  background: rgba(226,232,240,.9);
  box-shadow: inset 0 1px 2px rgba(15,23,42,.06);
}

.progress-line > span {
  background: linear-gradient(90deg, #38bdf8, #3b82f6 52%, #8b5cf6);
  box-shadow: 0 3px 12px rgba(59,130,246,.26);
}

.weak-badge {
  min-height: 28px;
  padding: 6px 11px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .02em;
}

.code-block {
  border: 1px solid rgba(148,163,184,.16);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(15,23,42,.96), rgba(17,24,39,.96)),
    radial-gradient(circle at 100% 0%, rgba(59,130,246,.20), transparent 32%);
  color: #dbeafe;
  box-shadow: 0 18px 42px rgba(15,23,42,.16);
}

.import-hero {
  overflow: hidden;
  border-radius: 30px;
}

.import-hero h3 {
  font-size: 30px;
  letter-spacing: -.04em;
}

.import-flow span {
  background: rgba(255,255,255,.70);
  border-color: rgba(147,197,253,.40);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.82);
}

.import-preview-item {
  overflow: hidden;
  border-radius: 26px;
  background: rgba(255,255,255,.86);
}

.import-card-head {
  background: linear-gradient(135deg, rgba(248,250,252,.96), rgba(239,246,255,.74));
  border-bottom: 1px solid rgba(148,163,184,.18);
}

.import-status,
.import-type-pill,
.import-confidence {
  min-height: 27px;
  border: 1px solid rgba(148,163,184,.16);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.72);
}

.modal-backdrop,
.answer-card-backdrop {
  background: rgba(8, 13, 23, .58);
  backdrop-filter: blur(12px) saturate(1.15);
}

.modal-card,
.answer-card-sheet {
  border: 1px solid rgba(255,255,255,.70);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.84)),
    radial-gradient(circle at 100% 0%, rgba(59,130,246,.14), transparent 30%);
  box-shadow: var(--shadow);
}

.toast {
  right: 24px;
  bottom: 24px;
  padding: 13px 17px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 18px;
  background: rgba(15, 23, 42, .92);
  box-shadow: 0 24px 54px rgba(15, 23, 42, .28);
  backdrop-filter: blur(12px);
}

@media (max-width: 1280px) {
  .topbar {
    align-items: flex-start;
  }
  .topbar-visual {
    min-width: 260px;
    grid-template-columns: 1fr;
  }
  .top-metric {
    min-height: 58px;
  }
  .top-metric:nth-child(2) { transform: none; }
  .question-layout {
    grid-template-columns: minmax(0, 1fr) 310px;
  }
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: relative;
    height: auto;
    padding: 16px;
    box-shadow: 0 16px 42px rgba(15,23,42,.18);
  }
  .main {
    padding: 18px;
  }
  .topbar {
    min-height: auto;
    flex-direction: column;
    align-items: stretch;
    padding: 22px;
  }
  .topbar-visual {
    min-width: 0;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .top-metric {
    min-height: 78px;
  }
  .question-layout,
  .stats-two-col {
    grid-template-columns: 1fr;
  }
  .progress-card {
    position: relative;
    top: auto;
  }
}

@media (max-width: 767px) {
  :root {
    --radius: 20px;
    --radius-lg: 24px;
  }

  body {
    background:
      radial-gradient(circle at 0% 0%, rgba(59,130,246,.18), transparent 34%),
      linear-gradient(180deg, #f7faff, #eef4fb 68%, #e9eef8);
  }

  .sidebar {
    position: sticky;
    top: 0;
    padding: 10px 12px;
    border-radius: 0 0 22px 22px;
    z-index: 30;
  }

  .brand {
    padding: 8px;
    border-radius: 18px;
  }

  .brand-icon {
    width: 44px;
    height: 44px;
    border-radius: 15px;
    font-size: 20px;
  }

  .brand h1 { font-size: 18px; }
  .brand::after { display: none; }

  .mobile-menu-btn {
    display: block;
    min-height: 38px;
    margin-left: auto;
    padding: 8px 12px;
    color: #e0f2fe;
    background: rgba(255,255,255,.10);
    border: 1px solid rgba(255,255,255,.14);
    box-shadow: none;
  }

  .nav {
    gap: 8px;
  }

  .nav-btn {
    min-height: 44px;
    border-radius: 14px;
  }

  .nav-btn::before {
    width: 24px;
    height: 24px;
    border-radius: 9px;
    font-size: 12px;
  }

  .main {
    padding: 12px 10px 34px;
  }

  .topbar {
    min-height: auto;
    margin-bottom: 12px;
    padding: 18px;
    border-radius: 24px;
  }

  .eyebrow {
    margin-bottom: 8px;
    font-size: 10px;
  }

  .topbar h2 {
    font-size: 27px;
  }

  .topbar p {
    font-size: 13px;
    line-height: 1.58;
  }

  .topbar-visual {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 7px;
  }

  .top-metric {
    min-height: 64px;
    padding: 10px;
    border-radius: 17px;
  }

  .top-metric span {
    font-size: 9px;
  }

  .top-metric strong {
    font-size: 15px;
  }

  .card,
  .question-card,
  .progress-card,
  .import-preview-item {
    border-radius: 20px;
    box-shadow: 0 10px 28px rgba(15,23,42,.07);
  }

  .card {
    padding: 16px;
  }

  #tab-practice .practice-toolbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding: 12px;
    border-radius: 20px;
    background: rgba(255,255,255,.86);
  }

  #tab-practice .practice-toolbar::before,
  #tab-practice .practice-toolbar .practice-search-field,
  #tab-practice .practice-toolbar #buildPracticeBtn,
  #tab-practice .practice-toolbar .practice-count-hint {
    grid-column: 1 / -1;
  }

  #tab-practice .practice-toolbar select,
  #tab-practice .practice-toolbar input {
    min-height: 40px;
    height: 40px;
    border-radius: 13px;
    font-size: 13px;
  }

  .question-card {
    min-height: auto;
    padding: 18px 14px 14px;
  }

  .question-meta {
    gap: 7px;
  }

  .question-meta span,
  .pill,
  .tag {
    min-height: 27px;
    padding: 5px 9px;
    font-size: 11px;
  }

  .question-card h3,
  .exam-running h3 {
    margin-top: 8px;
    font-size: 20px;
    line-height: 1.72;
  }

  .options {
    gap: 11px;
  }

  .option {
    grid-template-columns: 36px 1fr;
    gap: 12px;
    min-height: 58px;
    padding: 13px 12px;
    border-radius: 17px;
    font-size: 15px;
  }

  .option-key {
    width: 32px;
    height: 32px;
    border-radius: 12px;
  }

  .question-card > .answer-actions {
    position: sticky !important;
    bottom: env(safe-area-inset-bottom);
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 7px;
    margin: 16px -6px -4px;
    padding: 8px 6px calc(8px + env(safe-area-inset-bottom));
    border: 1px solid rgba(255,255,255,.70);
    border-radius: 18px;
    background: rgba(255,255,255,.82);
    box-shadow: 0 -8px 24px rgba(15,23,42,.08);
    backdrop-filter: blur(14px) saturate(1.2);
  }

  .question-card > .answer-actions button {
    width: 100%;
    min-height: 39px;
    padding: 7px 4px;
    border-radius: 12px;
    font-size: 11px;
  }

  .question-card > .answer-actions #submitAnswerBtn {
    grid-column: span 2;
    font-size: 12px;
  }

  .answer-card-trigger { display: block; }
  .progress-card { display: none; }

  .answer-card-sheet,
  .modal-card {
    border-radius: 24px 24px 0 0;
  }

  .answer-card-grid {
    grid-template-columns: repeat(5, minmax(44px, 1fr));
  }

  .import-hero,
  .import-card-head,
  .section-head,
  .list-row {
    align-items: stretch;
  }

  .import-flow {
    gap: 7px;
  }

  .import-flow span {
    padding: 7px 9px;
    font-size: 12px;
  }

  .stat-card {
    min-height: 92px;
  }

  .toast {
    left: 12px;
    right: 12px;
    bottom: 12px;
    max-width: none;
  }
}

/* v2 UI corrections: compact bank controls, Chinese-first labels, no practice toolbar bubble */
.eyebrow,
.top-metric span {
  text-transform: none;
  letter-spacing: .04em;
}

#tab-practice .practice-toolbar::before {
  display: none !important;
  content: none !important;
}

#tab-questionImport .compact-import-options .option-title {
  font-size: 13px;
  white-space: nowrap;
}

#tab-questionImport .compact-import-options .radio-card {
  min-height: 54px;
  padding: 9px 12px;
  border-radius: 14px;
  align-items: center;
}

#tab-questionImport .compact-import-options .radio-card strong {
  font-size: 14px;
}

#tab-questionImport .compact-import-options .radio-card em {
  font-size: 11px;
  line-height: 1.35;
}

#tab-questionImport .import-clean-mode {
  grid-template-columns: 104px repeat(2, minmax(200px, 1fr));
  margin-top: 12px;
}

@media (max-width: 1100px) {
  #tab-questionImport .import-clean-mode {
    grid-template-columns: 1fr 1fr;
  }
  #tab-questionImport .compact-import-options .option-title {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767px) {
  #tab-questionImport .import-clean-mode {
    display: grid;
    grid-template-columns: 1fr;
  }
}

/* Final cascade for the 2026-08 practice workspace redesign. */
.app-shell { grid-template-columns: 280px minmax(0, 1fr); }
.sidebar { padding: 20px 16px; }
.brand {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 12px 10px;
  border-radius: 16px;
}
.brand-icon { width: 38px; height: 38px; border-radius: 12px; font-size: 20px; font-weight: 700; }
.brand h1 { min-width: 0; margin: 0; font-size: 18px; font-weight: 700; line-height: 1.4; letter-spacing: 0; white-space: nowrap; }
.brand::after { margin: 0; padding: 3px 6px; font-size: 9px; font-weight: 700; line-height: 1.4; letter-spacing: .06em; }
.nav { gap: 7px; margin-bottom: 16px; }
.nav-btn { min-height: 44px; border-radius: 14px; }
.side-card { padding: 14px; border-radius: 18px; }
.side-card + .side-card { margin-top: 12px; }
.diagnostics-entry-btn {
  min-height: 34px;
  padding: 7px 10px;
  color: #9fb1c8;
  border-color: rgba(148, 163, 184, .16);
  background: rgba(15, 23, 42, .22);
  box-shadow: none;
  font-size: 12px;
}
.main { max-width: 1680px; padding: 22px 26px 48px; }
.topbar {
  min-height: auto;
  margin-bottom: 16px;
  padding: 4px 2px 12px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}
.topbar::before,
.topbar::after,
.topbar-visual,
.eyebrow { display: none; }
.topbar h2 { font-size: clamp(24px, 2.2vw, 32px); letter-spacing: -.035em; }
.topbar p { margin-top: 5px; color: #68758a; font-size: 13px; line-height: 1.55; }
#tab-practice .practice-toolbar {
  grid-template-columns: minmax(130px, .9fr) minmax(150px, 1.05fr) minmax(120px, .75fr) minmax(120px, .72fr) minmax(210px, 1.35fr) auto;
  gap: 10px;
  margin-bottom: 18px;
  padding: 16px 18px;
  border-color: #e7ebf3;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 10px 30px rgba(15, 23, 42, .055);
}
#tab-practice .practice-toolbar #buildPracticeBtn { min-height: 42px; align-self: end; padding-inline: 20px; border-radius: 11px; }
#tab-practice .practice-count-hint { grid-column: 1 / -1; }
.question-layout { grid-template-columns: minmax(0, 1fr) 326px; gap: 18px; align-items: start; }
.question-card {
  min-height: min(680px, calc(100vh - 220px));
  padding: 24px;
  border-color: #e7ebf3;
  background: rgba(255,255,255,.96);
  box-shadow: 0 14px 38px rgba(15, 23, 42, .065);
}
.question-card h3 { margin-top: 0; font-size: clamp(20px, 1.65vw, 26px); line-height: 1.55; }
.question-layout,
.question-card,
.exam-running {
  min-width: 0;
  max-width: 100%;
}
#questionText,
#examQuestionText {
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.options { gap: 11px; margin-top: 24px; }
.option { min-width: 0; max-width: 100%; min-height: 62px; padding: 13px 15px; overflow-wrap: anywhere; border-color: #e5eaf2; border-radius: 14px; background: #fff; box-shadow: none; }
:where(.question-card, .exam-running) > .answer-actions {
  display: grid;
  grid-template-columns: minmax(120px, 160px) minmax(220px, 1fr) minmax(120px, 160px);
  gap: 12px;
  margin-top: 26px;
}
:where(.question-card, .exam-running) > .answer-actions > button { width: 100%; min-height: 46px; }
.progress-card {
  top: 18px;
  padding: 20px;
  border-color: #e7ebf3;
  background: rgba(255,255,255,.96);
  box-shadow: 0 14px 38px rgba(15, 23, 42, .06);
}
.practice-progress-ring { position: relative; }
.question-more-trigger,
.answer-card-trigger { display: none; }

@media (max-width: 1180px) and (min-width: 768px) {
  #tab-practice .practice-toolbar { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .question-layout { grid-template-columns: minmax(0, 1fr) 290px; }
}

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .main { max-width: none; }
  .question-layout { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  .sidebar { padding: 10px 12px; }
  .brand { margin-bottom: 0; padding: 10px 12px; }
  .main { padding: 10px 10px 28px; }
  .topbar {
    margin-bottom: 10px;
    padding: 12px 14px;
    border: 1px solid rgba(255,255,255,.84);
    border-radius: 18px;
    background: rgba(255,255,255,.84);
    box-shadow: 0 8px 22px rgba(15,23,42,.055);
  }
  .topbar h2 { font-size: 21px; }
  .topbar p { margin-top: 3px; font-size: 11px; line-height: 1.45; }
  #tab-practice .practice-toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; padding: 12px; }
  #tab-practice .practice-toolbar #buildPracticeBtn,
  #tab-practice .practice-toolbar .practice-search-field,
  #tab-practice .practice-toolbar .practice-count-hint { grid-column: 1 / -1; }
  .question-layout { width: 100%; grid-template-columns: minmax(0, 1fr); }
  .question-card { min-height: auto; padding: 16px 14px 12px; overflow: visible; }
  .question-card h3 { font-size: 18px; line-height: 1.62; }
  #questionChapter { display: none; }
  .question-tools { flex-wrap: nowrap; gap: 3px; }
  .question-tool-btn { min-height: 32px; padding: 6px 7px; border-color: transparent; background: transparent; font-size: 10px; }
  .question-more-trigger,
  .answer-card-trigger { display: inline-flex; }
  .question-more-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    z-index: 20;
    width: 154px;
    display: none;
    padding: 7px;
    border: 1px solid #e4e9f2;
    border-radius: 14px;
    background: rgba(255,255,255,.98);
    box-shadow: 0 18px 42px rgba(15,23,42,.16);
  }
  .question-more-menu.open { display: grid; gap: 4px; }
  .question-card-header.menu-open { margin-bottom: 158px; }
  .question-more-menu button { width: 100%; min-height: 38px; justify-content: flex-start; text-align: left; }
  .question-card > .answer-actions {
    position: sticky !important;
    bottom: env(safe-area-inset-bottom);
    width: 100%;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
    grid-template-columns: minmax(72px, .8fr) minmax(120px, 1.45fr) minmax(72px, .8fr);
    gap: 7px;
    margin: 16px 0 -4px;
    padding: 8px 6px calc(8px + env(safe-area-inset-bottom));
  }
  .question-card > .answer-actions #submitAnswerBtn { grid-column: auto; font-size: 12px; }
  .question-card > .answer-actions button { min-width: 0; min-height: 42px; font-size: 11px; }
  .progress-card { display: none; }
}

/* Chapter picker: keep long names readable and align progress in a separate column. */
.chapter-progress-field { display: grid; gap: 7px; min-width: 0; }
.chapter-scope-controls { display: grid; flex-shrink: 0; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; min-width: 0; padding: 0 16px; }
.chapter-scope-controls label { display: grid; gap: 6px; min-width: 0; font-size: 12px; color: #738096; font-weight: 500; }
.chapter-scope-controls select, .wrong-scope-field > select { width: 100%; min-width: 0; text-overflow: ellipsis; }
.chapter-scope-controls select { height: 42px; padding: 8px 28px 8px 10px; border: 1px solid #dce4ef; border-radius: 8px; background-color: #fff; font-size: 12px; box-shadow: none; }
.chapter-scope-controls select:disabled { color: #96a0b0; background-color: #f7f9fc; }
.chapter-scope-heading { display: flex; flex-shrink: 0; align-items: center; justify-content: space-between; padding: 14px 16px 12px; font-size: 14px; }
.chapter-scope-heading .chapter-scope-done { padding: 6px 14px; min-height: 32px; border: 0; border-radius: 7px; background: #edf3ff; color: #3867d6; box-shadow: none; font-size: 12px; font-weight: 600; transform: none; }
.chapter-scope-hint { flex-shrink: 0; margin: 10px 16px 14px; color: #8390a3; font-size: 11px; }
.wrong-scope-field { margin: 12px 0 20px; }
.chapter-scope-wrong-count { font-size: 11px; text-align: right; color: #976129; }
@media (max-width: 540px) {
  .chapter-scope-controls { grid-template-columns: 1fr; gap: 8px; }
}
#chapterFilter[hidden], #wrongChapterFilter[hidden] { display: none; }
.chapter-progress-field .chapter-progress-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-width: 0;
  min-height: 42px;
  height: 42px;
  padding: 9px 12px;
  border: 1px solid #d4deed;
  border-radius: 11px;
  background: #f9fbff;
  color: #19263e;
  box-shadow: none;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0;
  transform: none;
}
.chapter-progress-field .chapter-progress-trigger:hover { background: #f4f7ff; }
.chapter-progress-field .chapter-progress-trigger:focus-visible,
.chapter-progress-field .chapter-progress-trigger[aria-expanded="true"] {
  outline: 2px solid #7ca0ff;
  outline-offset: 2px;
  border-color: #7197ff;
}
.chapter-progress-selected-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chapter-progress-selected-count { flex: 0 0 auto; color: #4f78ff; font-size: 11px; font-weight: 500; white-space: nowrap; font-variant-numeric: tabular-nums; }
.chapter-progress-trigger[data-status="empty"] .chapter-progress-selected-count { color: #627390; }
.chapter-progress-trigger[data-status="done"] .chapter-progress-selected-count { color: #17976b; }
.chapter-progress-chevron { flex: 0 0 auto; color: #627390; }
.chapter-progress-menu {
  position: fixed;
  z-index: 50;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid #e2e9f4;
  border-radius: 13px;
  background: #fff;
  color: #19263e;
  box-shadow: 0 12px 36px rgba(39, 59, 99, .18);
}
.chapter-progress-menu[hidden] { display: none; }
.chapter-progress-head,
.chapter-progress-option {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 116px;
  align-items: center;
  column-gap: 26px;
  padding: 12px 16px;
}
.chapter-progress-head { flex-shrink: 0; background: #f8fbff; border-bottom: 1px solid #e2e9f4; color: #627390; font-size: 12px; }
.chapter-progress-head > :last-child { text-align: right; }
.chapter-progress-options { min-height: 0; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
.chapter-progress-option { min-height: 54px; font-size: 12px; line-height: 1.65; cursor: pointer; }
.chapter-progress-option + .chapter-progress-option { border-top: 1px solid #edf1f8; }
.chapter-progress-option:hover,
.chapter-progress-option.highlighted { background: #f4f7ff; }
.chapter-progress-option[aria-selected="true"] { background: #edf3ff; }
.chapter-progress-option.highlighted { box-shadow: inset 3px 0 #7197ff; }
.chapter-progress-name { min-width: 0; overflow-wrap: anywhere; }
.chapter-progress-option[aria-selected="true"] .chapter-progress-name { color: #4f78ff; font-weight: 600; }
.chapter-progress-meter { display: grid; gap: 5px; }
.chapter-progress-count { color: #627390; font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.chapter-progress-count strong { color: #4f78ff; font-size: 14px; font-weight: 600; }
.chapter-progress-track { display: block; height: 4px; overflow: hidden; background: #e9eef7; border-radius: 4px; }
.chapter-progress-track > span { display: block; height: 100%; background: #4f78ff; border-radius: inherit; }
.chapter-progress-option[data-status="empty"] .chapter-progress-count strong { color: #627390; }
.chapter-progress-option[data-status="done"] .chapter-progress-count strong { color: #17976b; }
.chapter-progress-option[data-status="done"] .chapter-progress-track > span { background: #17976b; }
.chapter-progress-legend { display: flex; flex-shrink: 0; justify-content: flex-end; flex-wrap: wrap; gap: 16px; padding: 10px 16px; border-top: 1px solid #e2e9f4; background: #f8fbff; color: #627390; font-size: 11px; }
.chapter-progress-legend > span { display: flex; align-items: center; gap: 5px; }
.chapter-progress-legend i { width: 6px; height: 6px; border-radius: 50%; background: #8796ad; }
.chapter-progress-legend i.active { background: #4f78ff; }
.chapter-progress-legend i.done { background: #17976b; }
@media (max-width: 767px) {
  .chapter-progress-field .chapter-progress-trigger { height: auto; min-height: 42px; flex-wrap: wrap; gap: 2px 6px; padding: 7px 10px; }
  .chapter-progress-selected-name { flex-basis: calc(100% - 20px); order: 0; }
  .chapter-progress-chevron { order: 1; }
  .chapter-progress-selected-count { order: 2; flex-basis: 100%; }
  .chapter-progress-head, .chapter-progress-option { grid-template-columns: minmax(0, 1fr) 86px; column-gap: 14px; padding-inline: 12px; }
}

/* Keep the daily practice surface compact; chapter navigation opens on demand. */
#tab-practice .practice-toolbar {
  grid-template-columns: 130px 130px minmax(160px, 1fr) 140px 140px;
  grid-template-areas: "scope scope scope mode start" "type count search hint hint";
  align-items: end;
  gap: 14px 12px;
  padding: 18px 20px;
  border: 1px solid #e3e9f2;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 3px 16px rgba(38, 54, 80, .035);
}
#tab-practice .practice-toolbar .practice-chapter-field { grid-area: scope; }
#tab-practice .practice-toolbar .practice-mode-field { grid-area: mode; }
#tab-practice .practice-toolbar .practice-type-field { grid-area: type; }
#tab-practice .practice-toolbar .practice-count-field { grid-area: count; }
#tab-practice .practice-toolbar .practice-search-field { grid-area: search; }
#tab-practice .practice-toolbar label { color: #7b8799; font-size: 11px; font-weight: 500; letter-spacing: 0; gap: 6px; }
#tab-practice .practice-toolbar :is(select, input, .chapter-progress-trigger) { height: 42px; min-height: 42px; border: 1px solid #dce4ef; border-radius: 8px; background-color: #fff; font-size: 12px; box-shadow: none; }
#tab-practice .practice-toolbar .chapter-progress-trigger { background: #f8faff; border-color: #d5e0f5; font-weight: 500; }
#tab-practice .practice-toolbar #buildPracticeBtn { grid-area: start; min-height: 42px; padding: 10px 14px; display: flex; align-items: center; justify-content: center; gap: 12px; border-radius: 8px; background: #416de5; box-shadow: none; transform: none; font-size: 13px; font-weight: 600; letter-spacing: 0; }
#tab-practice .practice-toolbar #buildPracticeBtn:hover { background: #315bc9; }
#tab-practice .practice-toolbar .practice-count-hint { grid-area: hint; align-self: end; margin: 0; padding: 12px 0; color: #8994a4; font-size: 11px; font-weight: 400; line-height: 1.6; text-align: right; }
#tab-practice .practice-toolbar .practice-count-hint::before { content: none; display: none; }
@media (max-width: 1100px) {
  #tab-practice .practice-toolbar { grid-template-columns: 110px 110px minmax(100px, 1fr) 126px; grid-template-areas: "scope scope scope scope" "mode type count start" "search search hint hint"; }
}
@media (max-width: 767px) {
  #tab-practice .practice-toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-areas: "scope scope" "mode start" "type count" "search search" "hint hint"; gap: 10px; padding: 14px; }
  #tab-practice .practice-toolbar .chapter-progress-trigger { height: auto; min-height: 50px; }
  #tab-practice .practice-toolbar .practice-count-hint { padding: 0; text-align: left; }
}

/* Bank management: a compact workspace with one export destination. */
body:has(#tab-bank.active) { background: #f4f6fa; }
body:has(#tab-bank.active)::before,
body:has(#tab-bank.active)::after { display: none; }
#tab-bank { color: #24334b; }
#tab-bank .card {
  min-width: 0;
  margin-bottom: 18px;
  padding: 22px;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 3px 14px rgba(29, 49, 80, .035);
  backdrop-filter: none;
}
#tab-bank .card::before { display: none; }
#tab-bank h3 { margin: 0; font-size: 17px; font-weight: 700; line-height: 1.5; }
#tab-bank h4 { margin: 0; font-size: 14px; font-weight: 650; }
#tab-bank p { line-height: 1.6; }
#tab-bank button {
  min-height: 38px;
  padding: 8px 13px;
  border-radius: 8px;
  background: #3867e8;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
  box-shadow: none;
  transform: none;
}
#tab-bank button:hover { background: #2854c9; }
#tab-bank button.ghost { border: 1px solid #dce4ef; color: #415577; background: #fff; }
#tab-bank button.ghost:hover { color: #2854c9; border-color: #b7c9ed; background: #f5f8ff; }
#tab-bank button.danger.ghost { color: #bf4050; border-color: #f0d4d8; background: #fff; }
#tab-bank button.danger.ghost:hover { background: #fff1f2; border-color: #e6a6af; }
#tab-bank :is(button, summary):focus-visible { outline: 3px solid #8baaf4; outline-offset: 3px; }
#tab-bank :is(input, select, textarea) { min-width: 0; min-height: 42px; border: 1px solid #dce4ef; border-radius: 8px; background-color: #fff; font-size: 13px; box-shadow: none; }
#tab-bank :is(input, select, textarea):focus { border-color: #7598ed; box-shadow: 0 0 0 3px #edf2fe; }
#tab-bank input::placeholder, #tab-bank textarea::placeholder { color: #8995a7; }
#tab-bank .bank-section-heading { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 18px; }
#tab-bank .bank-section-heading p { margin: 3px 0 0; color: #738096; font-size: 12px; }
#tab-bank .bank-section-icon { display: grid; place-items: center; flex: 0 0 38px; width: 38px; height: 38px; border-radius: 11px; background: #eff4ff; color: #5275cc; }
#tab-bank .bank-section-icon svg { width: 21px; height: 21px; }
#tab-bank .bank-context-card { padding-block: 18px; }
#tab-bank .bank-context-card .bank-section-heading { gap: 14px; margin-bottom: 12px; }
#tab-bank .bank-context-card .bank-section-heading h3 { font-size: 14px; }
#tab-bank .bank-context-card .bank-section-heading p { margin: 0; }
#tab-bank .bank-manager-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; }
#tab-bank .bank-manager-grid label { font-size: 12px; font-weight: 500; color: #68788f; letter-spacing: 0; }
#tab-bank .bank-create-control { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: end; }
#tab-bank .bank-create-control button { min-height: 42px; }
#tab-bank .bank-workspace-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 18px; align-items: start; }
#tab-bank .compact-import-options { min-width: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 0 0 18px; padding: 0; border: 0; }
#tab-bank .compact-import-options .option-title { display: block; float: none; width: 100%; margin-bottom: 9px; padding: 0; font-size: 12px; font-weight: 600; color: #68788f; }
#tab-bank .compact-import-options .radio-card { display: flex; align-items: center; gap: 9px; min-height: 65px; padding: 11px; border: 1px solid #e2e8f0; border-radius: 10px; background: #fff; box-shadow: none; transform: none; }
#tab-bank .compact-import-options .radio-card:has(input:checked) { border-color: #9bb5f3; background: #f3f6ff; }
#tab-bank .compact-import-options .radio-card input { flex: 0 0 16px; width: 16px; height: 16px; min-height: 16px; margin: 0; padding: 0; accent-color: #3867e8; box-shadow: none; }
#tab-bank .compact-import-options .radio-card span { display: grid; gap: 4px; min-width: 0; }
#tab-bank .compact-import-options .radio-card strong { font-size: 13px; font-weight: 600; }
#tab-bank .compact-import-options .radio-card em { margin: 0; font-size: 11px; line-height: 1.5; }
#tab-bank .bank-field-title { display: block; font-size: 13px; font-weight: 600; }
#tab-bank .small-note { font-size: 12px; margin: 6px 0 10px; }
#tab-bank .bank-file-import { padding: 16px; border: 1px dashed #c9d6ed; border-radius: 10px; background: #fafbfe; }
#tab-bank #fileInput { height: auto; padding: 6px; background: #fff; }
#tab-bank #fileInput::file-selector-button { margin-right: 10px; padding: 7px 10px; border: 0; border-radius: 5px; background: #edf2fd; color: #4564a2; font: inherit; cursor: pointer; }
#tab-bank .bank-file-actions { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 12px; }
#tab-bank .bank-file-actions .small-note { margin: 0; }
#tab-bank .bank-file-actions button { flex-shrink: 0; }
#tab-bank .bank-disclosure > summary { display: flex; align-items: center; gap: 10px; min-height: 44px; padding-block: 12px; color: #51627d; font-size: 13px; font-weight: 600; list-style: none; cursor: pointer; }
#tab-bank .bank-disclosure > summary::-webkit-details-marker { display: none; }
#tab-bank .bank-disclosure > summary::after { content: ""; flex: 0 0 6px; height: 6px; margin-left: auto; margin-right: 3px; border-right: 1.5px solid #8391a8; border-bottom: 1.5px solid #8391a8; transform: rotate(45deg); }
#tab-bank .bank-disclosure[open] > summary::after { transform: rotate(225deg); }
#tab-bank .bank-summary-note { color: #8590a2; font-size: 11px; font-weight: 400; }
#tab-bank .bank-disclosure-content { display: grid; gap: 10px; padding: 0 0 12px; }
#tab-bank .bank-disclosure-content > button { justify-self: start; }
#tab-bank #pasteBox { min-height: 120px; line-height: 1.6; }
#tab-bank .bank-paste-import { margin-top: 4px; }
#tab-bank .bank-clean-import { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px; border-radius: 10px; background: #f1f5fc; }
#tab-bank .bank-clean-import strong { font-size: 12px; font-weight: 600; }
#tab-bank .bank-clean-import p { margin: 4px 0 0; color: #738096; font-size: 11px; }
#tab-bank .bank-clean-import button { flex-shrink: 0; color: #3867d6; background: #fff; border-color: #dae3f6; }
#tab-bank .bank-import-help { margin-top: 6px; }
#tab-bank .bank-import-help > summary { padding-bottom: 0; min-height: 34px; font-size: 12px; }
#tab-bank .bank-import-help[open] > summary { padding-bottom: 12px; }
#tab-bank .bank-format-guide { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 10px; margin: 5px 0 0; font-size: 12px; line-height: 1.7; }
#tab-bank .bank-format-guide dt { color: #50627f; font-weight: 600; }
#tab-bank .bank-format-guide dd { margin: 0; color: #78869a; }
#tab-bank .source-manager-card { display: flex; flex-direction: column; gap: 12px; }
#tab-bank .source-manager-card .bank-section-heading { margin-bottom: 4px; }
#tab-bank .source-manager-count { margin-left: auto; color: #71819a; font-size: 11px; font-weight: 500; }
#tab-bank .source-manager-toolbar { display: flex; flex-wrap: wrap; gap: 6px; }
#tab-bank .source-manager-toolbar input { flex-basis: 100%; }
#tab-bank .source-manager-selection-actions { display: flex; flex-wrap: wrap; justify-content: space-between; width: 100%; gap: 8px; }
#tab-bank .source-manager-selection-actions button { min-height: 30px; padding: 4px 0; border: 0; background: transparent; color: #5274b4; font-size: 12px; }
#tab-bank .source-manager-selection-actions button:hover { color: #2854c9; }
#tab-bank .source-manager-list { display: grid; gap: 0; max-height: 282px; min-height: 100px; padding: 0; border: 1px solid #e6ebf3; border-radius: 9px; background: #fff; scrollbar-width: thin; scrollbar-color: #c9d3e3 transparent; overscroll-behavior: contain; }
#tab-bank .source-manager-item { grid-template-columns: minmax(0, 1fr); min-height: 46px; gap: 10px; padding: 10px; border: 0; border-bottom: 1px solid #edf0f5; border-radius: 0; font-size: 12px; cursor: default; }
#tab-bank .source-manager-label { display: grid; grid-template-columns: 16px minmax(0, 1fr) auto; align-items: center; gap: 10px; min-width: 0; cursor: pointer; }
#tab-bank .is-sorting .source-manager-item { grid-template-columns: minmax(0, 1fr) auto; }
#tab-bank .source-order-toolbar { display: flex; flex-wrap: wrap; gap: 8px; }
#tab-bank .source-order-toolbar button { min-height: 34px; padding: 6px 12px; font-size: 12px; }
#tab-bank .source-order-toolbar [aria-pressed="true"] { color: #2854c9; background: #edf2ff; border-color: #bacaff; }
#tab-bank .source-order-hint { margin: 0; font-size: 12px; line-height: 1.6; }
#tab-bank .source-order-actions { display: flex; gap: 5px; align-items: center; }
#tab-bank .source-order-actions button { min-height: 32px; min-width: 32px; padding: 4px 7px; border-radius: 7px; font-size: 12px; box-shadow: none; }
#tab-bank .source-order-position { color: #8491a7; font-size: 11px; min-width: 20px; text-align: center; }
@media (max-width: 640px) {
  #tab-bank .is-sorting .source-manager-item { grid-template-columns: minmax(0, 1fr); }
  #tab-bank .source-order-actions { justify-content: flex-end; }
  #tab-bank .source-order-actions button { min-width: 44px; min-height: 44px; }
}
#tab-bank .source-manager-item:last-child { border-bottom: 0; }
#tab-bank .source-manager-item:hover { background: #f7f9fd; }
#tab-bank .source-manager-item:has(input:checked) { background: #f0f5ff; }
#tab-bank .source-manager-item input { width: 16px; height: 16px; min-height: 16px; padding: 0; accent-color: #3867e8; box-shadow: none; }
#tab-bank .source-manager-item span { line-height: 1.65; }
#tab-bank .source-manager-item strong { color: #7e8ba0; font-weight: 500; font-size: 11px; }
#tab-bank .source-manager-footer { flex-direction: row; flex-wrap: wrap; padding-top: 2px; }
#tab-bank .source-manager-footer > span { font-size: 12px; }
#tab-bank .source-manager-footer button { width: auto; min-height: 34px; padding: 7px 10px; font-size: 12px; }
#tab-bank .source-manager-warning { padding-top: 11px; border-top: 1px solid #edf0f5; color: #8d7580; font-size: 11px; line-height: 1.65; }
#tab-bank .source-manager-empty { font-size: 12px; align-self: center; text-align: center; }
#tab-bank .bank-scope-note { margin-left: auto; color: #7d8ca3; font-size: 11px; }
#tab-bank .bank-export-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 24px; }
#tab-bank .bank-export-group + .bank-export-group { padding-left: 24px; border-left: 1px solid #e8edf4; }
#tab-bank .bank-export-group p { margin: 6px 0 13px; color: #7a879b; font-size: 12px; }
#tab-bank .sample-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 0; }
#tab-bank .sample-actions button { width: auto; font-size: 12px; }
#tab-bank .bank-file-type { padding-left: 7px; color: #8b9ab1; font-size: 10px; font-weight: 500; }
#tab-bank .bank-danger-zone { padding: 0 20px; background: #fcfcfe; box-shadow: none; }
#tab-bank .bank-danger-zone > summary { min-height: 56px; color: #826570; }
#tab-bank .bank-danger-actions { border-top: 1px solid #e8edf4; padding-bottom: 4px; }
#tab-bank .bank-danger-actions > div { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 0; }
#tab-bank .bank-danger-actions > div + div { border-top: 1px solid #edf0f5; }
#tab-bank .bank-danger-actions h4 { font-size: 13px; }
#tab-bank .bank-danger-actions p { margin: 5px 0 0; color: #7a879b; font-size: 12px; }
#tab-bank .bank-danger-actions button { flex-shrink: 0; }
@media (max-width: 1199px) {
  #tab-bank .bank-workspace-grid { grid-template-columns: minmax(0, 1fr); }
  #tab-bank .source-manager-list { max-height: 280px; }
}
@media (max-width: 767px) {
  #tab-bank .card { padding: 16px; border-radius: 12px; margin-bottom: 14px; }
  #tab-bank .bank-manager-grid, #tab-bank .bank-export-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  #tab-bank .bank-workspace-grid { gap: 0; }
  #tab-bank .bank-section-heading { gap: 10px; margin-bottom: 16px; }
  #tab-bank .bank-section-heading p { font-size: 11px; }
  #tab-bank .bank-context-card .bank-section-heading { gap: 6px; }
  #tab-bank .bank-context-card .bank-section-heading p { width: 100%; }
  #tab-bank .compact-import-options .radio-card { padding: 10px 8px; gap: 7px; }
  #tab-bank .compact-import-options .radio-card strong { font-size: 12px; }
  #tab-bank .compact-import-options .radio-card em { font-size: 10px; }
  #tab-bank .bank-file-import { padding: 12px; }
  #tab-bank .bank-file-actions { flex-wrap: wrap; }
  #tab-bank .bank-file-actions button { margin-left: auto; }
  #tab-bank .bank-clean-import { padding: 12px; flex-wrap: wrap; }
  #tab-bank .bank-export-group + .bank-export-group { padding: 16px 0 0; border-left: 0; border-top: 1px solid #e8edf4; }
  #tab-bank .source-manager-count { flex-basis: 100%; margin: -4px 0 0 48px; }
  #tab-bank .source-manager-toolbar { display: flex; }
  #tab-bank .bank-scope-note { display: none; }
  #tab-bank .bank-danger-zone { padding: 0 16px; }
  #tab-bank .bank-danger-actions > div { flex-wrap: wrap; gap: 10px; }
}

/* Phone workflows: a compact entry and full-screen settings with one scroll area. */
.mobile-practice-entry, .mobile-practice-settings:not([open]), .chapter-scope-mobile-footer { display: none; }
.chapter-progress-menu { margin: 0; padding: 0; max-width: none; }
.chapter-scope-body { display: flex; flex-direction: column; min-height: 0; }
.chapter-progress-menu::backdrop, .mobile-practice-settings::backdrop { background: rgba(20, 32, 52, .38); }

@media (max-width: 767px) {
  body:has(#tab-practice.active) .topbar { padding: 8px 12px; box-shadow: none; }
  body:has(#tab-practice.active) .topbar h2 { font-size: 18px; }
  body:has(#tab-practice.active) #pageSubtitle { display: none; }
  #tab-practice .mobile-practice-entry {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    width: 100%; min-height: 72px; margin: 0 0 12px; padding: 12px 14px;
    border: 1px solid #dce5f4; border-radius: 12px; background: #fff; color: #233550;
    box-shadow: none; text-align: left; transform: none; letter-spacing: 0;
  }
  .mobile-practice-edit { flex-shrink: 0; color: #3867d6; font-size: 14px; }
  #mobilePracticeSettings {
    position: fixed; left: 0; top: 0; margin: 0; padding: 0; width: 100%; max-width: none;
    height: 100dvh; max-height: none; border: 0; border-radius: 0; background: #fff; color: #233550;
    flex-direction: column; overflow: hidden; box-sizing: border-box;
  }
  #mobilePracticeSettings[open] { display: flex; }
  #mobilePracticeSettings > header { display: grid; grid-template-columns: 70px 1fr 70px; align-items: center; flex-shrink: 0; padding: calc(8px + env(safe-area-inset-top)) 12px 8px; border-bottom: 1px solid #edf0f5; }
  #mobilePracticeSettings h3 { margin: 0; text-align: center; font-size: 17px; }
  #mobilePracticeSettings .mobile-settings-back { min-height: 44px; padding: 8px 12px; border: 0; background: #f2f5fa; color: #4b607e; border-radius: 8px; box-shadow: none; font-size: 14px; transform: none; }
  .mobile-settings-body { flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; }
  #tab-practice #mobilePracticeSettings .practice-toolbar { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-areas: "scope scope" "mode mode" "type count" "search search" "hint hint"; gap: 20px 12px; margin: 0; padding: 20px 16px; border: 0; border-radius: 0; box-shadow: none; }
  #tab-practice #mobilePracticeSettings label { font-size: 13px; gap: 8px; }
  #tab-practice #mobilePracticeSettings :is(select, input) { min-height: 48px; height: 48px; font-size: 16px; }
  #tab-practice #mobilePracticeSettings .chapter-progress-trigger { min-height: 60px; gap: 6px; padding: 10px 12px; font-size: 14px; }
  #tab-practice #mobilePracticeSettings .practice-count-hint { font-size: 12px; }
  #mobilePracticeSettings > footer { flex-shrink: 0; padding: 12px 16px max(12px, env(safe-area-inset-bottom)); border-top: 1px solid #edf0f5; background: #fff; }
  #mobilePracticeSettings #buildPracticeBtn { width: 100%; min-height: 50px; border: 0; border-radius: 10px; background: #416de5; color: #fff; box-shadow: none; font-size: 16px; letter-spacing: 0; transform: none; }
  .chapter-progress-menu { border: 0; border-radius: 0; box-shadow: none; box-sizing: border-box; }
  .chapter-progress-menu .chapter-scope-heading { flex-shrink: 0; min-height: 60px; padding: calc(8px + env(safe-area-inset-top)) 16px 8px; border-bottom: 1px solid #edf0f5; font-size: 17px; }
  .chapter-progress-menu .chapter-scope-done { min-height: 44px; padding: 8px 16px; font-size: 14px; }
  .chapter-scope-body { display: block; flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; }
  .chapter-scope-body .chapter-scope-controls { display: grid; grid-template-columns: 1fr; gap: 16px; padding: 20px 16px 0; }
  .chapter-scope-body .chapter-scope-controls label { font-size: 13px; }
  .chapter-scope-body .chapter-scope-controls select { min-height: 48px; height: 48px; font-size: 16px; }
  .chapter-scope-body .chapter-progress-options { overflow: visible; }
  .chapter-scope-body .chapter-progress-legend { display: none; }
  .chapter-scope-body .chapter-progress-option { min-height: 64px; font-size: 14px; }
  .chapter-scope-mobile-footer { display: grid; flex-shrink: 0; gap: 10px; padding: 12px 16px max(12px, env(safe-area-inset-bottom)); border-top: 1px solid #e5eaf2; background: #fff; }
  .chapter-scope-selection { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; color: #718099; font-size: 12px; line-height: 1.5; }
  .chapter-scope-mobile-footer button { min-height: 50px; border: 0; border-radius: 10px; background: #416de5; box-shadow: none; font-size: 16px; transform: none; }
  #tab-practice .question-card { padding: 14px 12px 12px; border-radius: 16px; }
  #tab-practice .question-card-header { flex-wrap: wrap; gap: 8px; }
  #tab-practice .question-tools { margin-left: auto; }
  #tab-practice .question-tool-btn { min-height: 44px; padding: 8px; font-size: 12px; }
  #tab-practice .options { margin-top: 16px; }
  #tab-practice .option { min-height: 56px; font-size: 16px; }
  #tab-practice .question-card > .answer-actions { gap: 6px; padding-inline: 0; grid-template-columns: minmax(64px, .8fr) minmax(108px, 1.25fr) minmax(64px, .8fr); }
  #tab-practice .question-card > .answer-actions button, #tab-practice .question-card > .answer-actions #submitAnswerBtn { min-height: 48px; font-size: 14px; }
}

/* Direct mobile chapter navigation and sibling training shortcuts. */
.mobile-scope-browser { display: none; }
@media (max-width: 767px) {
  body:has(#tab-practice.active) .topbar { display: none; }
  #tab-practice .question-card::after { display: none; }
  #tab-practice .question-meta { margin: 0; }
  #tab-practice .mobile-practice-entry { display: grid; grid-template-columns: minmax(0, 1fr) 52px; gap: 0 10px; padding: 8px 12px; }
  #tab-practice .mobile-practice-entry > button { min-width: 0; border: 0; border-radius: 8px; box-shadow: none; background: transparent; color: #233550; transform: none; letter-spacing: 0; }
  #tab-practice #mobilePracticeScopeBtn { display: grid; gap: 4px; min-height: 64px; padding: 4px 0; text-align: left; }
  #tab-practice #mobilePracticeSettingsBtn { min-height: 48px; padding: 8px; color: #536980; background: #f2f5fa; font-size: 13px; }
  .mobile-training-switch { grid-column: 1 / -1; display: flex; gap: 8px; padding: 8px 0 2px; overflow-x: auto; }
  .mobile-training-switch[hidden] { display: none; }
  #tab-practice .mobile-training-switch button { flex: 0 0 auto; min-height: 42px; max-width: 100%; padding: 8px 12px; border: 1px solid #dee6f3; border-radius: 8px; color: #526781; background: #fff; box-shadow: none; transform: none; font-size: 12px; font-weight: 500; }
  #tab-practice .mobile-training-switch button[aria-pressed="true"] { color: #3867d6; border-color: #b5c9f5; background: #edf3ff; }
  #tab-practice .mobile-training-switch button:disabled { opacity: .45; }
  .has-mobile-browser .chapter-scope-body > :not(.mobile-scope-browser) { display: none; }
  .mobile-scope-browser { display: block; padding: 8px 16px 20px; }
  .scope-breadcrumbs { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: 4px; overflow-x: auto; padding: 8px 0; margin-top: -8px; background: #fff; }
  .mobile-scope-browser .scope-crumb { flex: 0 1 auto; max-width: 120px; min-width: 42px; min-height: 44px; padding: 8px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; border: 0; border-radius: 6px; color: #61738b; background: #f4f6fa; box-shadow: none; transform: none; font-size: 12px; }
  .mobile-scope-browser .scope-crumb[aria-current] { color: #3867d6; background: #edf3ff; }
  .scope-search-label { display: grid; gap: 6px; font-size: 12px; color: #7b8a9e; }
  .scope-search-label input { width: 100%; min-height: 48px; border: 1px solid #dce4ef; border-radius: 8px; background: #fff; font-size: 16px; box-shadow: none; }
  .scope-level-heading { padding: 16px 0 10px; color: #667991; font-size: 13px; line-height: 1.5; }
  .scope-level-row { display: flex; gap: 8px; align-items: center; border-bottom: 1px solid #edf0f5; }
  .mobile-scope-browser .scope-node { flex: 1; display: grid; gap: 6px; min-height: 74px; min-width: 0; padding: 12px 4px; border: 0; border-radius: 8px; background: #fff; color: #253b59; text-align: left; box-shadow: none; transform: none; letter-spacing: 0; scroll-margin-top: 64px; }
  .scope-node strong { font-size: 15px; line-height: 1.55; overflow-wrap: anywhere; font-weight: 500; }
  .scope-node > span { color: #7c8ca3; font-size: 12px; font-weight: 400; }
  .mobile-scope-browser .scope-node[aria-pressed="true"] { background: #edf3ff; color: #3867d6; }
  .mobile-scope-browser .scope-pick-all { flex: 0 0 auto; min-height: 44px; padding: 8px 12px; border: 1px solid #dce6f6; border-radius: 8px; background: #f8faff; color: #3867d6; box-shadow: none; transform: none; font-size: 13px; }
}

/* Keep the current question's provenance readable on phones. */
.question-origin { display: none; }
@media (max-width: 767px) {
  body:has(#tab-practice.active) .sidebar { padding: 6px 12px; border-radius: 0 0 16px 16px; }
  body:has(#tab-practice.active) .brand { padding: 0; border: 0; background: transparent; box-shadow: none; }
  body:has(#tab-practice.active) .mobile-menu-btn { min-height: 44px; }
  #tab-practice .mobile-practice-entry { grid-template-columns: minmax(0, 1fr) auto 48px; gap: 0 8px; padding: 6px 10px; min-height: 56px; margin-bottom: 10px; }
  .mobile-practice-detail { min-width: 0; color: #63748b; font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
  #tab-practice #mobilePracticeScopeBtn { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 6px 8px; color: #315fcc; font-size: 13px; font-weight: 600; }
  #tab-practice #mobilePracticeSettingsBtn { min-height: 44px; }
  #tab-practice .mobile-training-switch { padding-top: 4px; }
  #tab-practice .mobile-training-switch button { min-height: 40px; }
  #tab-practice .question-card-header { margin-bottom: 12px; }
  #tab-practice .question-meta { gap: 6px; }
  #tab-practice .question-meta span { padding: 4px 6px; font-size: 11px; }
  #tab-practice .question-tool-btn { min-width: 44px; padding: 6px; font-size: 11px; }
  .question-origin:not([hidden]) { display: block; margin: 0 0 16px; padding: 10px 12px; border: 1px solid #e3eaf5; border-radius: 10px; background: #f7f9fd; color: #42546e; }
  .question-origin-heading { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 10px; margin-bottom: 6px; font-size: 11px; line-height: 1.5; color: #73829a; }
  .question-origin-training { color: #315fcc; font-size: 12px; font-weight: 600; overflow-wrap: anywhere; }
  .question-origin-path { margin: 0; padding: 0; list-style: none; font-size: 13px; line-height: 1.65; overflow-wrap: anywhere; }
  .question-origin-path li { display: inline; }
  .question-origin-path li + li::before { content: ' / '; color: #9ba9bc; }
  .question-origin-path li:last-child { color: #263f61; font-weight: 600; }
  .question-origin-reference { margin: 7px 0 0; padding-top: 7px; border-top: 1px solid #e5ebf4; font-size: 11px; line-height: 1.65; color: #677a94; overflow-wrap: anywhere; white-space: pre-wrap; }
}
@media (max-width: 360px) {
  #tab-practice .question-tool-btn::before { display: none; }
}
/* Case materials and free-form answers share the existing question workflow. */
.case-material { min-width: 0; margin: 0 0 16px; padding: 0; border: 1px solid #e0e6ef; border-radius: 14px; background: #f8fafc; overflow: hidden; }
.case-material summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 52px; padding: 12px 20px; cursor: pointer; list-style: none; }
.case-material summary::-webkit-details-marker { display: none; }
.case-material summary:hover { background: #f0f4fa; }
.case-material summary:focus-visible, .case-material-body:focus-visible { outline: 2px solid #416de5; outline-offset: -3px; }
.case-material-title { display: flex; align-items: center; gap: 10px; color: #293d5a; font-size: 15px; font-weight: 700; }
.case-material-title::before { content: ""; width: 3px; height: 15px; border-radius: 2px; background: #5273cf; }
.case-material-toggle { display: inline-flex; align-items: center; gap: 6px; color: #5d6f88; font-size: 12px; font-weight: 400; white-space: nowrap; }
.case-material-toggle svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.case-material[open] .case-material-toggle svg { transform: rotate(180deg); }
.case-material .case-collapse-label, .case-material[open] .case-expand-label { display: none; }
.case-material[open] .case-collapse-label { display: inline; }
.case-material .case-material-body { margin: 0; padding: 18px 22px 22px; border-top: 1px solid #e5eaf2; white-space: normal; overflow-wrap: anywhere; font-size: 17px; line-height: 1.9; font-weight: 400; color: #34445b; scrollbar-width: thin; scrollbar-color: #b9c5d8 transparent; }
.case-material-body p { margin: 0; font: inherit; line-height: inherit; }
.case-material-body p + p { margin-top: 12px; }
.case-question-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; align-items: start; min-width: 0; }
.case-question-layout .case-material, .subjective-layout .case-material { margin-bottom: 0; }
.case-question-layout .case-material-body, .subjective-layout .case-material-body { max-height: min(56vh, 560px); overflow-y: auto; }
.case-answer-options { display: grid; gap: 12px; min-width: 0; }
.question-prompt, .case-question-prompt { min-width: 0; }
.case-question-prompt .question-prompt h3 { margin: 0; }
.case-answer-options .option { align-items: flex-start; line-height: 1.75; }
.case-answer-options .option-key { flex-shrink: 0; }
.subjective-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; min-width: 0; width: 100%; }
.subjective-parts { min-width: 0; }
.subjective-hint, .subjective-draft-status { color: #738299; font-size: 13px; line-height: 1.6; font-weight: 400; }
.subjective-part { display: block; margin-bottom: 20px; }
.subjective-part > span { display: block; margin-bottom: 10px; color: #25324a; font-size: 16px; line-height: 1.7; font-weight: 500; }
.subjective-part b { color: #315bdd; margin-right: 8px; }
.subjective-part textarea, .edit-subjective-part textarea { width: 100%; min-height: 130px; padding: 14px; border: 1px solid #d9e2f1; border-radius: 12px; background: #fff; color: #17263e; font-size: 16px; font-weight: 400; line-height: 1.75; resize: vertical; box-sizing: border-box; }
.subjective-part textarea[readonly] { background: #f8fafc; }
.subjective-assessment { background: #f8faff; border-color: #dce5ff; }
.subjective-reference section { margin: 16px 0 22px; }
.subjective-reference h4 { margin-bottom: 12px; font-size: 16px; line-height: 1.7; }
.subjective-user, .subjective-model { padding: 14px 16px; margin-top: 10px; border-radius: 12px; background: #f5f7fb; }
.subjective-model { background: #edf8f3; }
.subjective-user > div, .subjective-model > div { margin-top: 8px; white-space: pre-wrap; overflow-wrap: anywhere; font-size: 15px; line-height: 1.8; color: #26344a; }
.subjective-mastery { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 18px; }
.subjective-mastery button { min-height: 44px; padding: 10px; }
.subjective-mastery button.selected { background: #e6edff; border-color: #7694ff; color: #2245bc; }
.exam-self-grade { display: flex; align-items: end; flex-wrap: wrap; gap: 12px; margin-top: 20px; padding-top: 18px; border-top: 1px solid #e6ebf3; }
.exam-self-grade label { display: grid; gap: 7px; font-size: 13px; color: #53627b; }
.exam-self-grade input { width: 160px; min-height: 44px; font-size: 18px; }
.exam-self-grade button { min-height: 44px; }
.exam-self-grade > span { align-self: center; font-size: 14px; color: #65758f; }
.edit-subjective-part { margin: 14px 0; padding: 16px; border: 1px solid #dce4f1; border-radius: 12px; }
.edit-subjective-part > div { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.edit-subjective-part label { display: block; margin-top: 12px; }
@media (min-width: 981px) {
  /* Case reading gets the full workspace; secondary statistics become a quiet footer. */
  .question-layout:has(.case-material) { grid-template-columns: minmax(0, 1fr); }
  .question-layout:has(.case-material) .question-card::after { display: none; }
  .question-layout:has(.case-material) .progress-card { position: static; display: grid; grid-template-columns: minmax(120px, .75fr) minmax(140px, 1fr) minmax(160px, 1fr) auto; align-items: center; gap: 16px; padding: 18px 22px; border-radius: 16px; box-shadow: none; }
  .question-layout:has(.case-material) .progress-card-header { margin: 0; gap: 16px; }
  .question-layout:has(.case-material) .progress-card-header h3 { font-size: 16px; margin: 3px 0 0; }
  .question-layout:has(.case-material) .practice-progress-overview { display: block; margin: 0; }
  .question-layout:has(.case-material) .practice-progress-legend { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 20px; }
  .question-layout:has(.case-material) .practice-metric-strip { margin: 0; }
  .question-layout:has(.case-material) .answer-card-summary-btn { margin: 0; width: auto; min-width: 130px; }
  .question-layout:has(.case-material) :is(.practice-progress-ring, .progress-card-summary, .progress-card .tip) { display: none; }
}
@media (max-width: 767px) {
  .case-question-layout { gap: 18px; }
  .case-material summary { padding: 12px 14px; }
  .case-material .case-material-body { padding: 14px 16px 18px; max-height: 340px; overflow-y: auto; font-size: 16px; line-height: 1.85; }
  .subjective-mastery { gap: 6px; }
  .subjective-mastery button { font-size: 14px; }
  .exam-self-grade { display: grid; grid-template-columns: minmax(0, 1fr) auto; }
  .exam-self-grade input { width: 100%; }
  .exam-self-grade button { grid-column: 1 / -1; width: 100%; }
}

/* General actions stay compact and never inherit the question navigation grid. */
.action-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 20px; }
.action-row > button { flex: 0 1 144px; width: 144px; min-width: 0; min-height: 44px; padding: 11px 16px; border: 1px solid #3867e8; border-radius: 10px; background: #3867e8; color: #fff; font-size: 14px; font-weight: 600; line-height: 20px; letter-spacing: 0; white-space: nowrap; box-shadow: none; transform: none; }
.action-row > button:hover { background: #2856cd; box-shadow: none; transform: none; }
.action-row > button.ghost { border-color: #dce3ed; background: #fff; color: #40536e; }
.action-row > button.ghost:hover { background: #f4f7fb; }
.action-row > button.danger.ghost { border-color: #f0d7db; background: #fff; color: #bb4656; }
.action-row > button.danger.ghost:hover { background: #fff3f5; }
.action-row > button:focus-visible { outline: 3px solid #b4c8ff; outline-offset: 3px; }
@media (max-width: 540px) {
  .action-row { gap: 10px; }
  .action-row > button { flex: 1 1 0; width: auto; min-height: 46px; padding-inline: 10px; }
}

/* Exam exit has its own action layout, independent of question navigation. */
.modal-card.exam-exit-card { width: min(520px, 100%); padding: 28px; border: 1px solid #e5eaf2; border-radius: 20px; background: #fff; box-shadow: 0 24px 80px #0f172a26; }
.exam-exit-icon { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 18px; border-radius: 12px; background: #eef3ff; color: #4166d5; }
.exam-exit-icon svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.exam-exit-card h3 { margin: 0 0 10px; color: #1f2d43; font-size: 22px; line-height: 1.4; letter-spacing: 0; }
.exam-exit-card p { margin: 0; color: #68768b; font-size: 14px; line-height: 1.85; }
.exam-exit-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 26px; }
.exam-exit-actions button { width: 100%; min-width: 0; height: 46px; padding: 0 10px; border-radius: 10px; font-size: 14px; font-weight: 600; line-height: 1.4; letter-spacing: 0; white-space: nowrap; box-shadow: none; transform: none; }
.exam-exit-actions #saveExitExamBtn { border: 1px solid #4166d5; background: #4166d5; color: #fff; }
.exam-exit-actions #saveExitExamBtn:hover { background: #3454b9; }
.exam-exit-actions #cancelExitExamBtn { border: 1px solid #dce3ed; background: #fff; color: #40536e; }
.exam-exit-actions #cancelExitExamBtn:hover { background: #f4f7fb; }
.exam-exit-actions #discardExitExamBtn { border: 1px solid #f0d7db; background: #fff; color: #bb4656; }
.exam-exit-actions #discardExitExamBtn:hover { background: #fff3f5; }
.exam-exit-actions button:focus-visible { outline: 3px solid #b4c8ff; outline-offset: 3px; }
@media (max-width: 540px) {
  .modal-card.exam-exit-card { padding: 24px 20px; border-radius: 18px; }
  .exam-exit-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 22px; }
  .exam-exit-actions #saveExitExamBtn { grid-column: 1 / -1; }
  .exam-exit-actions button { height: 48px; font-size: 15px; }
}

/* Mobile exam: pinned chrome, one reading pane, and shared desktop controls. */
.mobile-exam-header, .mobile-exam-dock { display: none; }
.mobile-exam-sheet:not([open]) { display: none; }
.mobile-exam-sheet [hidden] { display: none !important; }
.exam-grid-star { position: absolute; top: 1px; right: 3px; color: #a96912; font-size: 10px; line-height: 1; }
#examGrid .grid-btn { position: relative; }
.exam-review-mark { display: inline-block; margin: 0 0 12px; padding: 5px 10px; border-radius: 7px; background: #fff6e5; color: #986015; font-size: 13px; font-weight: 600; }
.exam-review-mark-summary { color: #986015; font-size: 14px; }
.exam-review-actions > button { flex-basis: 160px; width: auto; }
.exam-review-actions > button[aria-pressed="true"] { color: #986015; background: #fff6e5; border-color: #edcf9c; }
.exam-history-title-block .exam-history-marked-btn { display: block; width: fit-content; min-height: 32px; margin-top: 7px; padding: 4px 9px; border: 0; border-radius: 6px; background: #fff6e5; color: #986015; font-size: 12px; font-weight: 600; box-shadow: none; transform: none; }

@media (max-width: 767px) {
  body.mobile-exam-active { overflow: hidden; overscroll-behavior: none; }
  body.mobile-exam-active .sidebar, body.mobile-exam-active .topbar { visibility: hidden; }
  body.mobile-exam-active .main, body.mobile-exam-active #tab-exam { transform: none; filter: none; }
  body.mobile-exam-active #examRunning {
    position: fixed; inset: var(--exam-viewport-top, 0px) 0 auto; z-index: 18;
    width: 100%; max-width: none; height: var(--exam-viewport-height, 100dvh); min-height: 0;
    display: grid; grid-template-rows: auto minmax(0, 1fr) auto; margin: 0; padding: 0;
    border: 0; border-radius: 0; background: #fff; box-shadow: none; backdrop-filter: none;
    overflow: hidden; overflow-anchor: none; animation: none; transform: none;
  }
  #examRunning > .exam-header, #examRunning > .answer-actions { display: none; }
  #examRunning .mobile-exam-header { display: block; padding: max(14px, env(safe-area-inset-top)) 16px 0; background: #fff; }
  .mobile-exam-top-row { display: flex; align-items: center; gap: 10px; }
  .mobile-exam-paper { flex: 1; min-width: 0; }
  .mobile-exam-paper small { display: block; margin-bottom: 3px; color: #718096; font-size: 11px; line-height: 1.5; font-weight: 400; }
  .mobile-exam-paper strong { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; overflow-wrap: anywhere; color: #182235; font-size: 15px; line-height: 1.45; font-weight: 600; }
  .mobile-exam-clock { display: flex; align-items: baseline; gap: 5px; flex-shrink: 0; }
  .mobile-exam-clock > span { color: #718096; font-size: 11px; }
  .mobile-exam-clock #examTimer { min-width: 74px; width: auto; padding: 0; border: 0; border-radius: 0; background: transparent; color: #182235; font-size: 23px; line-height: 1.4; font-weight: 650; letter-spacing: -.5px; box-shadow: none; font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
  .mobile-exam-clock #examTimer.exam-time-low { color: #bd3f52; }
  .mobile-exam-clock:has(.exam-time-low) > span { display: none; }
  .mobile-exam-top-row .mobile-exam-more { flex: 0 0 40px; min-width: 0; height: 44px; padding: 0; border: 0; background: transparent; color: #182235; box-shadow: none; font-size: 22px; line-height: 1; letter-spacing: 1px; }
  .mobile-exam-meta { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 15px 0 13px; }
  .mobile-exam-meta .exam-header-summary { display: flex; align-items: center; gap: 8px; min-width: 0; }
  .mobile-exam-meta #examProgress { color: #182235; font-size: 14px; font-weight: 650; white-space: nowrap; }
  .mobile-exam-meta .pill { padding: 3px 7px; border: 0; border-radius: 6px; color: #3d63e8; background: #edf2ff; font-size: 11px; font-weight: 500; white-space: nowrap; }
  .mobile-exam-answered { color: #718096; font-size: 12px; font-weight: 400; white-space: nowrap; }
  .mobile-exam-progress { height: 3px; margin: 0 -16px; background: #f3f6fb; }
  .mobile-exam-progress > div { height: 100%; background: #3d63e8; }
  #examReadingPane { min-height: 0; padding: 22px 18px 28px; overflow: auto; overscroll-behavior: contain; overflow-anchor: none; scroll-behavior: auto; scrollbar-width: thin; scrollbar-color: #e5eaf2 transparent; }
  #examReadingPane #examQuestionText { margin: 0 0 20px; color: #182235; font-size: 19px; line-height: 1.82; font-weight: 600; letter-spacing: .1px; }
  #examOptionsBox { gap: 12px; margin-top: 18px; }
  #examOptionsBox .option { display: flex; align-items: center; gap: 12px; min-height: 72px; width: 100%; padding: 16px 14px; border: 1px solid #e5eaf2; border-radius: 14px; background: #fff; color: #182235; font-size: 16px; line-height: 1.6; font-weight: 400; box-shadow: none; transform: none; transition: none; }
  #examOptionsBox .option.selected { border-color: #3d63e8; background: #edf2ff; }
  #examOptionsBox .option .option-key { flex: 0 0 30px; width: 30px; height: 30px; border: 0; border-radius: 9px; background: #f3f6fb; color: #718096; font-size: 14px; line-height: 30px; font-weight: 600; box-shadow: none; }
  #examOptionsBox .option.selected .option-key { color: #fff; background: #3d63e8; }
  #examReadingPane .case-material-body { max-height: none; overflow: visible; }
  #examReadingPane .case-material { margin-top: 0; }
  #examRunning .mobile-exam-dock { display: block; padding: 10px 16px max(12px, env(safe-area-inset-bottom)); border-top: 1px solid #e5eaf2; background: #fff; box-shadow: 0 -6px 20px #15263d05; }
  .mobile-exam-tools { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 8px; }
  .mobile-exam-tools > button { min-width: 0; min-height: 44px; padding: 8px; border: 0; border-radius: 10px; background: transparent; color: #718096; font-size: 13px; line-height: 20px; font-weight: 500; box-shadow: none; }
  .mobile-exam-tools #examMarkBtn[aria-pressed="true"] { color: #a96912; background: #fff6e5; box-shadow: none; }
  .mobile-exam-navigation { display: grid; grid-template-columns: 108px minmax(0, 1fr); gap: 10px; }
  .mobile-exam-navigation > button { min-width: 0; height: 48px; padding: 10px 8px; border: 1px solid #e5eaf2; border-radius: 12px; background: #fff; color: #253754; font-size: 15px; line-height: 22px; font-weight: 600; white-space: nowrap; box-shadow: none; }
  .mobile-exam-navigation #examNextBtn { border-color: #3d63e8; background: #3d63e8; color: #fff; }
  #examRunning button:hover, #examRunning button:active, .mobile-exam-sheet button:hover, .mobile-exam-sheet button:active { transform: none; }
  .mobile-exam-sheet { position: fixed; inset: auto 0 0; width: 100%; max-width: none; max-height: min(85dvh, 760px); margin: 0; padding: 18px 18px max(20px, env(safe-area-inset-bottom)); border: 0; border-radius: 22px 22px 0 0; background: #fff; color: #182235; overflow-y: auto; overscroll-behavior: contain; }
  .mobile-exam-sheet::backdrop { background: #14213666; }
  .mobile-exam-sheet-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
  .mobile-exam-sheet-head h3 { margin: 0; font-size: 19px; font-weight: 600; }
  .mobile-exam-sheet-close { width: 44px; min-height: 44px; padding: 0; border: 0; border-radius: 10px; background: #f3f6fb; color: #526078; box-shadow: none; font-size: 24px; font-weight: 400; }
  .mobile-exam-card-counts { margin: 0 0 16px; color: #65758b; font-size: 13px; }
  .mobile-exam-grid-slot { max-height: 44dvh; overflow-y: auto; overscroll-behavior: contain; padding: 2px; }
  .mobile-exam-sheet #examGrid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 9px; margin: 0; }
  .mobile-exam-sheet #examGrid button { width: 100%; min-width: 0; min-height: 46px; padding: 9px 4px; border: 1px solid transparent; border-radius: 10px; background: #f3f6fb; color: #718096; font-size: 15px; line-height: 22px; font-weight: 600; box-shadow: none; }
  .mobile-exam-sheet #examGrid .done { background: #edf9f4; color: #188066; }
  .mobile-exam-sheet #examGrid .current { border-color: #3d63e8; box-shadow: 0 0 0 1px #3d63e8; }
  .mobile-exam-card-legend { margin: 14px 0; text-align: center; color: #718096; font-size: 11px; }
  .mobile-exam-submit-slot > button { width: 100%; min-height: 48px; border: 0; border-radius: 12px; background: #3d63e8; color: #fff; font-size: 15px; font-weight: 600; box-shadow: none; }
  .mobile-exam-menu-panel { display: grid; }
  .mobile-exam-menu-panel > button { min-height: 56px; padding: 12px 8px; border: 0; border-bottom: 1px solid #edf0f5; border-radius: 0; background: #fff; color: #253754; font-size: 16px; font-weight: 500; text-align: left; box-shadow: none; }
  .mobile-exam-menu-panel > button:last-child { border-bottom: 0; }
  #examRunning .exam-pause-overlay { backdrop-filter: none; }
}
@media (max-width: 370px) {
  .mobile-exam-top-row { gap: 6px; }
  .mobile-exam-paper strong { font-size: 14px; }
  .mobile-exam-clock #examTimer { font-size: 21px; min-width: 68px; }
  .mobile-exam-top-row .mobile-exam-more { flex-basis: 36px; }
  #examReadingPane { padding: 20px 14px 26px; }
  .mobile-exam-navigation { grid-template-columns: 96px minmax(0, 1fr); }
  .mobile-exam-meta { gap: 5px; }
  .mobile-exam-meta .exam-header-summary { gap: 5px; }
  .mobile-exam-meta #examProgress { font-size: 13px; }
}

/* Practice tools: one desktop row, aligned phone actions and a lower answer card. */
#tab-practice {
  --practice-icon-star: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m12 3 2.8 5.7 6.2.9-4.5 4.4 1.1 6.2L12 17.3l-5.6 2.9 1.1-6.2L3 9.6l6.2-.9Z'/%3E%3C/svg%3E");
  --practice-icon-star-filled: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='m12 3 2.8 5.7 6.2.9-4.5 4.4 1.1 6.2L12 17.3l-5.6 2.9 1.1-6.2L3 9.6l6.2-.9Z'/%3E%3C/svg%3E");
  --practice-icon-note: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='5' y='3' width='15' height='18' rx='2'/%3E%3Cpath d='M3 7h4M3 12h4M3 17h4M10 8h6M10 12h6M10 16h4'/%3E%3C/svg%3E");
  --practice-icon-more: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='5' cy='12' r='2'/%3E%3Ccircle cx='12' cy='12' r='2'/%3E%3Ccircle cx='19' cy='12' r='2'/%3E%3C/svg%3E");
  --practice-icon-edit: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m15 5 4 4M4 20l4-1L20 7a2.8 2.8 0 0 0-4-4L4 15Z'/%3E%3C/svg%3E");
  --practice-icon-delete: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 6h18M9 6V3h6v3M5 6l1 15h12l1-15M10 10v7M14 10v7'/%3E%3C/svg%3E");
  --practice-icon-grid: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8'%3E%3Crect x='3' y='3' width='18' height='18' rx='2'/%3E%3Cpath d='M12 3v18M3 12h18'/%3E%3C/svg%3E");
  --practice-icon-chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m9 5 7 7-7 7'/%3E%3C/svg%3E");
}
#tab-practice .question-card { width: 100%; min-width: 0; container: practice-question / inline-size; }
#tab-practice .question-card-header { align-items: center; flex-wrap: nowrap; gap: 14px; }
#tab-practice .question-meta { flex: 1; min-width: 0; flex-wrap: nowrap; gap: 8px; margin: 0; }
#tab-practice .question-meta > span { flex-shrink: 0; white-space: nowrap; }
#tab-practice #questionChapter { display: block; flex: 0 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
#tab-practice .question-tools { flex: 0 0 auto; flex-wrap: nowrap; align-items: center; gap: 7px; }
#tab-practice .question-more-menu { flex-wrap: nowrap; }
#tab-practice .question-tool-label-short { display: none; }
#tab-practice .question-tools button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 36px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid #d8e4fa;
  border-radius: 10px;
  background: #f2f6ff;
  color: #335294;
  box-shadow: none;
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0;
  white-space: nowrap;
  transform: none;
}
#tab-practice .question-tools button:hover { background: #e9f0ff; transform: none; box-shadow: none; }
#tab-practice .question-tools button::before,
#tab-practice .practice-answer-card-label::before,
#tab-practice #openAnswerCardBtn::after {
  content: "";
  display: block;
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  margin: 0;
  background: currentColor;
  -webkit-mask: var(--practice-icon) center / contain no-repeat;
  mask: var(--practice-icon) center / contain no-repeat;
}
#tab-practice #bookmarkBtn { --practice-icon: var(--practice-icon-star); }
#tab-practice #bookmarkBtn[aria-pressed="true"] { --practice-icon: var(--practice-icon-star-filled); color: #915a06; border-color: #e8c46d; background: #fff5dc; }
#tab-practice #bookmarkBtn[aria-pressed="true"]:hover { background: #ffedbc; }
#tab-practice #questionNoteBtn { --practice-icon: var(--practice-icon-note); }
#tab-practice #questionNoteBtn.has-note { color: #7144bf; background: #f2ecff; border-color: #d2baf6; }
#tab-practice #questionNoteBtn.has-note:hover { background: #e8ddff; }
#tab-practice #questionMoreBtn { display: none; --practice-icon: var(--practice-icon-more); }
#tab-practice #editQuestionBtn { --practice-icon: var(--practice-icon-edit); }
#tab-practice #deleteQuestionBtn { --practice-icon: var(--practice-icon-delete); color: #c33e50; background: #fff4f5; border-color: #f5cbd1; }
#tab-practice #deleteQuestionBtn:hover { background: #ffe7eb; }
#tab-practice #openAnswerCardBtn { display: none; }
#tab-practice #openAnswerCardBtn::before { content: none; }
#tab-practice #openAnswerCardBtn::after { --practice-icon: var(--practice-icon-chevron); width: 14px; height: 14px; flex-basis: 14px; }
#tab-practice .practice-answer-card-label { display: inline-flex; align-items: center; gap: 7px; --practice-icon: var(--practice-icon-grid); }
#tab-practice .practice-answer-card-count { margin-left: auto; color: #65738b; font-size: 12px; font-weight: 400; font-variant-numeric: tabular-nums; }
@media (min-width: 768px) {
  @container practice-question (max-width: 560px) {
    #tab-practice .question-card-header { gap: 8px; }
    #tab-practice .question-meta { gap: 6px; }
    #tab-practice .question-meta > span { padding: 4px 6px; font-size: 11px; }
    #tab-practice #questionChapter { display: none; }
    #tab-practice .question-tools, #tab-practice .question-more-menu { gap: 4px; }
    #tab-practice .question-tools button { padding-inline: 6px; font-size: 11px; }
    #tab-practice .question-tools button::before,
    #tab-practice .question-tool-label-full { display: none; }
    #tab-practice .question-tool-label-short { display: inline; }
    #tab-practice .question-card > .answer-actions { grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr) minmax(0, 1fr); gap: 8px; }
    #tab-practice .question-card > .answer-actions button { min-width: 0; padding-inline: 6px; font-size: 14px; }
  }
}
@media (max-width: 767px) {
  #tab-practice .question-card-header,
  #tab-practice .question-card-header.menu-open { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; margin-bottom: 16px; }
  #tab-practice .question-meta { width: 100%; justify-content: space-between; }
  #tab-practice #questionType { padding: 5px 10px; font-size: 12px; font-weight: 600; }
  #tab-practice #questionIndex { padding: 0; border: 0; background: transparent; box-shadow: none; color: #52637c; font-size: 13px; font-weight: 600; }
  #tab-practice #questionChapter { display: none; }
  #tab-practice .question-tools { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); width: 100%; min-width: 0; gap: 8px; margin: 0; }
  #tab-practice .question-tools > button { width: 100%; min-width: 0; min-height: 44px; height: 44px; padding: 0 6px; font-size: 13px; }
  #tab-practice #questionMoreBtn { display: inline-flex; }
  #tab-practice .question-more-menu { top: calc(100% + 7px); background: #fff; }
  #tab-practice .question-more-menu button { justify-content: flex-start; min-height: 44px; height: 44px; }
  #tab-practice .question-card > .answer-actions {
    position: static !important;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 8px;
    width: 100%;
    max-width: none;
    margin: 20px 0 0;
    padding: 16px 0 0;
    border: 0;
    border-top: 1px solid #e1e7f1;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
  }
  #tab-practice .question-card > .answer-actions button,
  #tab-practice .question-card > .answer-actions #submitAnswerBtn { min-height: 44px; height: 44px; padding: 0 6px; font-size: 13px; font-weight: 600; line-height: 1.2; letter-spacing: 0; transform: none; box-shadow: none; border-radius: 10px; }
  #tab-practice #submitAnswerBtn { background: #4263e7; border-color: #4263e7; }
  #tab-practice #openAnswerCardBtn { display: flex; grid-column: 1 / -1; align-items: center; gap: 8px; padding-inline: 12px; color: #335294; background: #fff; border: 1px solid #d8e4fa; text-align: left; }
}