:root {
  --navy: #10233F;
  --gold: #C6952E;
  --gold-deep: #8F6A1D;
  --ink: #1C1E22;
  --ink-secondary: #4A4E55;
  --ink-muted: #8B8A80;
  --surface: #FBFAF7;
  --surface-alt: #EFEDE5;
  --border: #D8D2C2;
  --border-strong: #C7BFA8;
  --accent: #10233F;
  --accent-light: #E7EAF0;
  --success: #3E6B4F;
  --success-light: #E7EFE9;
  --warning: #B98900;
  --warning-light: #FCF3E0;
  --danger: #7A2A2A;
  --danger-light: #F3E6E3;
  --radius: 4px;
  --font-sans: 'Public Sans', -apple-system, sans-serif;
  --font-serif: 'Newsreader', Georgia, serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--surface-alt);
  color: var(--ink);
  font-family: var(--font-sans);
}
a { color: inherit; }
.page { max-width: 1180px; margin: 0 auto; padding: 20px 24px 60px; }

/* ---- Header (shared) ---- */
.header {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 20px; margin-bottom: 20px;
}
.logo {
  font-family: var(--font-serif); font-size: 24px; font-weight: 600;
  color: var(--navy); text-decoration: none; flex-shrink: 0;
}
.logo span { color: var(--gold-deep); }
.header-meta { font-size: 12.5px; color: var(--ink-secondary); }
.header-nav { display: flex; align-items: center; gap: 18px; font-size: 13.5px; font-weight: 500; }
.header-nav a { text-decoration: none; color: var(--ink-secondary); }
.header-nav a:hover, .header-nav a.active { color: var(--gold-deep); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px;
}
.label { font-size: 12px; color: var(--ink-secondary); margin-bottom: 8px; }

/* ---- Buttons ---- */
.btn {
  font-family: var(--font-sans); font-size: 14px; font-weight: 600;
  padding: 10px 16px; border-radius: var(--radius); border: 1px solid transparent;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary { background: var(--gold); color: var(--navy); border-color: var(--gold); }
.btn-primary:hover { background: var(--gold-deep); border-color: var(--gold-deep); color: #fff; }
.btn-ghost { background: var(--surface); border-color: var(--navy); color: var(--navy); }
.btn-ghost:hover { background: var(--navy); color: #fff; }

/* ---- Exams browser ---- */
.section-title { font-family: var(--font-serif); font-size: 22px; font-weight: 500; margin: 32px 0 14px; }
.test-list { display: flex; flex-direction: column; gap: 10px; }
.test-row {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 18px; text-decoration: none; color: var(--ink);
}
.test-row:hover { border-color: var(--accent); }
.test-row-title { font-size: 14.5px; font-weight: 600; }
.test-row-meta { font-size: 12.5px; color: var(--ink-secondary); margin-top: 2px; }
.test-row-right { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.progress-pill {
  font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px;
  background: var(--surface-alt); color: var(--ink-secondary);
}
.progress-pill.done { background: var(--success-light); color: var(--success); }
.progress-pill.started { background: var(--warning-light); color: var(--warning); }

/* ---- Quiz layout ---- */
.layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 20px; align-items: start; }
.sidebar { position: sticky; top: 20px; display: flex; flex-direction: column; gap: 16px; }
.score-value { display: flex; align-items: baseline; gap: 6px; }
.score-value .num { font-size: 28px; font-weight: 600; }
.score-value .den { font-size: 13px; color: var(--ink-muted); }
.score-bar { margin-top: 8px; height: 6px; border-radius: 3px; background: var(--surface-alt); overflow: hidden; }
.score-bar-fill { height: 100%; background: var(--accent); }
.score-meta { margin-top: 8px; font-size: 12px; color: var(--ink-secondary); }
.mini-stats { display: flex; gap: 16px; margin-top: 10px; }
.mini-stat .n { font-size: 13px; font-weight: 600; }
.mini-stat .l { font-size: 11px; color: var(--ink-secondary); }

.subject-row { margin-bottom: 8px; }
.subject-top { display: flex; justify-content: space-between; font-size: 12px; margin-bottom: 3px; }
.subject-top .pct { color: var(--ink-secondary); }
.subject-bar { height: 5px; border-radius: 3px; background: var(--surface-alt); overflow: hidden; }
.subject-bar-fill { height: 100%; }
.fill-strong { background: var(--success); }
.fill-mid { background: var(--warning); }
.fill-weak { background: var(--danger); }

.focus-card { border: 1px solid var(--danger); background: var(--danger-light); }
.focus-title { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; color: var(--danger); margin-bottom: 4px; }
.focus-text { font-size: 12px; color: var(--ink-secondary); }

.palette-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.palette-item {
  height: 30px; border: 1px solid var(--border-strong); border-radius: var(--radius);
  background: var(--surface); font-size: 12px; cursor: pointer; color: var(--ink);
}
.palette-item.correct { background: var(--success); border-color: var(--success); color: #fff; }
.palette-item.incorrect { background: var(--danger); border-color: var(--danger); color: #fff; }
.palette-item:hover { border-color: var(--accent); }
.legend { display: flex; flex-direction: column; gap: 4px; margin-top: 10px; font-size: 11px; color: var(--ink-secondary); }
.legend-dot { width: 8px; height: 8px; border-radius: 2px; display: inline-block; margin-right: 6px; vertical-align: middle; }

.passage-card { margin-bottom: 16px; }
.passage-title { font-family: var(--font-serif); font-size: 17px; font-weight: 500; margin: 0 0 8px; }
.passage-context { font-size: 14px; line-height: 1.6; color: var(--ink); margin: 0 0 10px; }
.passage-rules { margin: 0; padding-left: 18px; font-size: 13.5px; line-height: 1.7; color: var(--ink-secondary); }

.notes-card { margin-bottom: 16px; }
.notes-heading { font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.notes-body { font-size: 13px; color: var(--ink-secondary); line-height: 1.7; white-space: pre-line; }

.section-label { font-size: 12.5px; font-weight: 600; color: var(--gold-deep); text-transform: uppercase; letter-spacing: .03em; margin: 20px 0 10px; }

.question-block { padding-bottom: 16px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.question-block:last-child { border-bottom: none; margin-bottom: 0; }
.q-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.q-number { font-size: 14px; font-weight: 600; }
.q-mark { font-size: 11px; color: var(--ink-muted); background: var(--surface-alt); padding: 2px 8px; border-radius: 999px; }
.q-text { font-family: var(--font-serif); font-size: 17px; line-height: 1.6; margin: 0 0 14px; color: var(--ink); }
.options-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.option {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 11px 12px; cursor: pointer; font-size: 14px;
  transition: border-color .1s ease, background .1s ease;
}
.option:hover { border-color: var(--border-strong); }
.option.selected { border-color: var(--accent); background: var(--accent-light); }
.option.locked { cursor: default; }
.option.correct-answer { border-color: var(--success); background: var(--success-light); }
.option.wrong-answer { border-color: var(--danger); background: var(--danger-light); }
.option-letter {
  width: 22px; height: 22px; border-radius: 50%; border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center; font-size: 12px; flex-shrink: 0;
}
.option.selected .option-letter { border-color: var(--accent); color: var(--accent); }
.option.correct-answer .option-letter { border-color: var(--success); color: var(--success); }
.option.wrong-answer .option-letter { border-color: var(--danger); color: var(--danger); }

.q-actions { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.q-action-btn {
  display: flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); background: var(--surface);
  border-radius: var(--radius); padding: 7px 12px; font-size: 13px; color: var(--ink); cursor: pointer;
}
.q-action-btn:hover { border-color: var(--border-strong); }
.q-scratch { width: 100%; min-height: 60px; margin-top: 10px; border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 12px; font-family: var(--font-sans); font-size: 13.5px; resize: vertical; }

.result-box {
  display: none; margin-top: 12px; border-radius: var(--radius); padding: 10px 14px;
}
.result-box.open { display: block; }
.result-box.is-correct { border: 1px solid var(--success); background: var(--success-light); }
.result-box.is-incorrect { border: 1px solid var(--danger); background: var(--danger-light); }
.result-box.is-neutral { border: 1px solid var(--border); background: var(--surface-alt); }
.result-title { font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.result-box.is-correct .result-title { color: var(--success); }
.result-box.is-incorrect .result-title { color: var(--danger); }
.result-text { font-size: 13px; color: var(--ink-secondary); line-height: 1.6; }
.self-check { display: flex; gap: 8px; margin-top: 10px; }
.self-check button { font-size: 12.5px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border-strong); background: var(--surface); cursor: pointer; }
.self-check button.chosen-right { background: var(--success); border-color: var(--success); color: #fff; }
.self-check button.chosen-wrong { background: var(--danger); border-color: var(--danger); color: #fff; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--ink-secondary); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .options-grid { grid-template-columns: 1fr; }
}