/* ============================================================
   IELTS Practice Portal — design tokens
   Palette: examination-hall calm. Navy ink, cool paper,
   crimson reserved for brand + urgency, bronze for band scores.
   ============================================================ */
:root {
  --ink: #16233b;
  --ink-soft: #45526b;
  --ink-faint: #8b95a8;
  --paper: #f4f6f9;
  --surface: #ffffff;
  --line: #e2e7ee;
  --line-strong: #c9d2de;
  --brand: #b9273a;
  --brand-soft: #f9eef0;
  --navy-btn: #1d2f4e;
  --navy-btn-hover: #16233b;
  --band: #a16a0f;
  --band-soft: #faf3e3;
  --good: #177a4e;
  --good-soft: #e9f5ef;
  --bad: #c23a3a;
  --bad-soft: #faeeee;
  --focus: #2563eb;
  --exam-bar-bg: #1d2f4e;
  --exam-navbar-bg: #16233b;
  --exam-current: #e0a72e;
  --exam-flag: #d9455f;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-1: 0 1px 2px rgba(22, 35, 59, 0.06), 0 1px 3px rgba(22, 35, 59, 0.08);
  --shadow-2: 0 4px 12px rgba(22, 35, 59, 0.1), 0 2px 4px rgba(22, 35, 59, 0.06);
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 28px;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}
.wordmark { display: flex; align-items: center; gap: 10px; }
.wordmark-badge {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: #fff;
  background: var(--brand);
  padding: 4px 9px;
  border-radius: 5px;
}
.wordmark-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
}
.topnav { display: flex; gap: 4px; }
.topbar-account { display: flex; align-items: center; gap: 12px; }
.account-name { font-size: 0.85rem; color: var(--ink-soft); font-weight: 500; }
.account-logout {
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink-soft);
  cursor: pointer;
}
.account-logout:hover { background: var(--paper); color: var(--ink); }
.nav-link {
  background: none;
  border: none;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
  cursor: pointer;
  border-radius: 999px;
  transition: background 0.15s, color 0.15s;
}
.nav-link:hover { background: var(--paper); color: var(--ink); }
.nav-link.active { background: var(--ink); color: #fff; }

/* ---------- Layout ---------- */
main {
  padding: 32px 28px 64px;
  max-width: 1240px;
  margin: 0 auto;
}

.page-head { margin-bottom: 24px; }
.page-head h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
}
.page-head .sub { color: var(--ink-soft); margin: 0; font-size: 0.95rem; }

.back-link {
  background: none;
  border: none;
  color: var(--ink-soft);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  padding: 6px 10px 6px 0;
  margin-bottom: 10px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.back-link:hover { color: var(--ink); }

/* ---------- Mock library ---------- */
.mock-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.mock-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  text-align: left;
  box-shadow: var(--shadow-1);
  transition: box-shadow 0.18s, transform 0.18s, border-color 0.18s;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mock-card:hover {
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
  border-color: var(--line-strong);
}
.mock-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}
.mock-card .meta { color: var(--ink-faint); font-size: 0.85rem; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink-soft);
}
.chip.on { background: var(--good-soft); border-color: transparent; color: var(--good); }

/* ---------- Test list within a mock ---------- */
.test-row {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-1);
}
.test-row h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
}
.section-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 9px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}
.btn-primary { background: var(--navy-btn); color: #fff; }
.btn-primary:hover { background: var(--navy-btn-hover); box-shadow: var(--shadow-1); }
.btn-ghost {
  background: var(--surface);
  color: var(--ink-soft);
  border: 1px solid var(--line-strong);
}
.btn-ghost:hover { color: var(--ink); background: var(--paper); }
.btn:disabled {
  background: var(--paper);
  color: var(--ink-faint);
  border: 1px dashed var(--line-strong);
  cursor: not-allowed;
}
.btn-brand { background: var(--brand); color: #fff; }
.btn-brand:hover { filter: brightness(0.94); }

/* ---------- Exam shell : IELTS-style top bar ---------- */
.exam-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: var(--exam-bar-bg, #1d2f4e);
  border: 1px solid var(--exam-bar-bg, #1d2f4e);
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-1);
  position: sticky;
  top: 68px;
  z-index: 40;
  color: #fff;
}
.exam-bar-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.exam-bar-divider { width: 1px; height: 20px; background: rgba(255,255,255,0.25); }
.exam-bar-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.55);
}
.exam-bar-section {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.exam-bar-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.exam-bar .answered-count {
  color: rgba(255,255,255,0.75);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.exam-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.22);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}
.exam-tool-btn:hover { background: rgba(255,255,255,0.2); }

.exam-timer-box {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.15;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-sm);
  padding: 5px 12px;
  min-width: 108px;
}
.exam-timer-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
}
.exam-timer-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
  color: #fff;
}
.exam-timer-box.warning {
  background: var(--bad);
  border-color: var(--bad);
  animation: pulse 1.2s infinite;
}
.exam-timer-box.warning .exam-timer-label,
.exam-timer-box.warning .exam-timer-value { color: #fff; }
@keyframes pulse { 50% { opacity: 0.55; } }

/* ---------- Settings popover ---------- */
.settings-wrap { position: relative; }
.settings-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 220px;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-2);
  padding: 12px;
  z-index: 60;
}
.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  padding: 6px 0;
}
.settings-btns { display: flex; gap: 4px; }
.settings-btns button {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  border-radius: 5px;
  width: 26px;
  height: 26px;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.75rem;
}
.settings-btns button:nth-child(2) { font-size: 0.9rem; }
.settings-btns button:nth-child(3) { font-size: 1.05rem; }
.settings-btns button.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.settings-toggle {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 3px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
}

/* Text-size scaling applied to the exam material + answer sheet */
.exam-shell.text-lg .content-text,
.exam-shell.text-lg .sheet-cell input,
.exam-shell.text-lg .inline-input,
.exam-shell.text-lg textarea.essay { font-size: 1.14em; }
.exam-shell.text-xl .content-text,
.exam-shell.text-xl .sheet-cell input,
.exam-shell.text-xl .inline-input,
.exam-shell.text-xl textarea.essay { font-size: 1.3em; }

/* "Hide" — simulates the real exam's break/hide-test feature */
.exam-shell.is-hidden { position: relative; min-height: 240px; }
.exam-shell.is-hidden > * { visibility: hidden; }
.exam-shell.is-hidden::after {
  content: "Test hidden. Click \"Resume test\" above to continue.";
  visibility: visible;
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 40px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-weight: 600;
}

/* High-contrast accessibility mode (mirrors the real exam's Settings) */
body.high-contrast { background: #000; color: #ffe066; }
body.high-contrast .topbar,
body.high-contrast .exam-material,
body.high-contrast .exam-answers,
body.high-contrast .settings-panel,
body.high-contrast .mock-card,
body.high-contrast .test-row { background: #000 !important; color: #ffe066 !important; border-color: #444 !important; }
body.high-contrast .sheet-cell,
body.high-contrast .inline-input,
body.high-contrast textarea.essay { background: #111 !important; color: #ffe066 !important; border-color: #555 !important; }
body.high-contrast .exam-navbar { background: #000; border-top-color: #444; }
body.high-contrast .navq-num { background: #111; color: #ffe066; border-color: #555; }

.exam-shell {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.exam-material {
  flex: 1.35;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 14px;
  box-shadow: var(--shadow-1);
}
.exam-material img {
  width: 100%;
  display: block;
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.exam-answers {
  flex: 1;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 20px;
  box-shadow: var(--shadow-1);
}
.exam-answers h3 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

/* Progress chips — one per question, fills as you answer */
.progress-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 18px;
}
.pchip {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.pchip:hover { border-color: var(--ink-soft); }
.pchip.filled { background: var(--ink); border-color: var(--ink); color: #fff; }

/* The answer sheet — the signature element */
.answer-sheet {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 14px;
}
@media (max-width: 1100px) { .answer-sheet { grid-template-columns: 1fr; } }
.sheet-cell {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 6px 8px 6px 6px;
  background: #fdfdfe;
  transition: border-color 0.12s, background 0.12s;
}
.sheet-cell:focus-within {
  border-color: var(--focus);
  background: var(--surface);
}
.sheet-cell .num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-faint);
  min-width: 26px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.sheet-cell input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  padding: 4px 2px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--ink);
}
.sheet-cell input:focus { outline: none; }

.submit-area {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.submit-area .btn { width: 100%; padding: 12px; font-size: 0.95rem; }

/* ---------- Bottom question navigator (real IELTS "review" bar) ---------- */
body.has-exam-navbar { padding-bottom: 96px; }
.exam-navbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  display: flex;
  align-items: stretch;
  background: var(--exam-navbar-bg);
  border-top: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 -4px 14px rgba(0,0,0,0.18);
}
.navbar-arrow {
  flex: 0 0 44px;
  border: none;
  background: rgba(255,255,255,0.06);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
}
.navbar-arrow:hover { background: rgba(255,255,255,0.14); }
.exam-navbar-scroll {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 22px;
  overflow-x: auto;
  padding: 8px 16px;
  scrollbar-width: thin;
}
.navq-group { display: flex; align-items: center; gap: 8px; flex: none; }
.navq-group-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.45);
  white-space: nowrap;
  margin-right: 2px;
}
.navq-row { display: flex; gap: 5px; flex: none; }
.navq { position: relative; flex: none; }
.navq-num {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.28);
  background: transparent;
  color: rgba(255,255,255,0.85);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.navq-num:hover { border-color: #fff; }
.navq.is-answered .navq-num { background: #fff; color: var(--exam-navbar-bg); border-color: #fff; }
.navq.is-current .navq-num { border-color: var(--exam-current); box-shadow: 0 0 0 2px var(--exam-current); }
.navq-flag {
  position: absolute;
  top: -5px;
  right: -5px;
  width: 12px;
  height: 12px;
  padding: 0;
  border-radius: 50%;
  border: none;
  background: transparent;
  cursor: pointer;
}
.navq-flag::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  transition: background 0.12s, transform 0.12s;
}
.navq-flag:hover::before { transform: scale(1.15); }
.navq.is-flagged .navq-flag::before { background: var(--exam-flag); }
@media (max-width: 900px) {
  .exam-navbar-scroll { gap: 14px; padding: 8px 10px; }
  body.has-exam-navbar { padding-bottom: 84px; }
}

/* ---------- Listening ---------- */
.listening-part { margin-bottom: 26px; }
.audio-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  position: sticky;
  top: 0;
  z-index: 5;
  box-shadow: var(--shadow-1);
}
.audio-bar .part-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
  color: var(--ink);
}
.audio-bar audio { width: 100%; height: 36px; }
.question-sheet img {
  width: 100%;
  display: block;
  margin-bottom: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.missing-sheet {
  padding: 16px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--ink-faint);
  font-size: 0.85rem;
  margin-bottom: 8px;
  background: var(--paper);
}

/* ---------- Writing ---------- */
textarea.essay {
  width: 100%;
  height: 340px;
  padding: 14px;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  resize: vertical;
  color: var(--ink);
}
textarea.essay:focus { outline: none; border-color: var(--focus); }
.word-count {
  text-align: right;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-top: 6px;
  font-variant-numeric: tabular-nums;
}

/* ---------- Results ---------- */
.results-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-1);
  max-width: 860px;
}
.results-box h2 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
}
.auto-note { color: var(--bad); font-size: 0.85rem; font-weight: 500; }
.score-line {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin: 14px 0 6px;
  flex-wrap: wrap;
}
.score-frac {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.band-chip {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--band);
  background: var(--band-soft);
  padding: 5px 14px;
  border-radius: 999px;
}
.time-taken { color: var(--ink-faint); font-size: 0.88rem; font-family: var(--font-mono); }

/* Band ribbon — 0 to 9 scale with a marker at your band */
.band-ribbon { margin: 22px 0 26px; }
.band-ribbon .track {
  position: relative;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--line) 0%, var(--band-soft) 55%, var(--band) 100%);
}
.band-ribbon .marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--surface);
  border: 3px solid var(--band);
  box-shadow: var(--shadow-1);
}
.band-ribbon .scale {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

.review-list { margin-top: 2px; }
.results-wide { max-width: 960px; }
.results-subhead {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--ink-soft);
  margin: 26px 0 12px;
}

/* Summary tiles */
.summary-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin-top: 4px;
}
.tile {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  background: var(--paper);
}
.tile-num { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; }
.tile-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-faint); font-weight: 600; margin-top: 2px; }
.tile.good { background: var(--good-soft); border-color: transparent; }
.tile.good .tile-num { color: var(--good); }
.tile.bad { background: var(--bad-soft); border-color: transparent; }
.tile.bad .tile-num { color: var(--bad); }
.tile.skip .tile-num { color: var(--ink-faint); }

/* Per-part / per-passage breakdown */
.group-breakdown { display: flex; flex-direction: column; gap: 10px; }
.group-row {
  display: grid;
  grid-template-columns: 170px 1fr 56px;
  align-items: center;
  gap: 14px;
}
.group-label { font-size: 0.88rem; font-weight: 600; }
.group-range { color: var(--ink-faint); font-weight: 500; font-family: var(--font-mono); font-size: 0.75rem; margin-left: 4px; }
.group-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--paper);
  border: 1px solid var(--line);
  overflow: hidden;
}
.group-fill { height: 100%; border-radius: 999px; }
.group-fill.good { background: var(--good); }
.group-fill.mid { background: var(--band); }
.group-fill.low { background: var(--bad); }
.group-score {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.weak-note {
  margin: 12px 0 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
  background: var(--band-soft);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}

/* Filter tabs */
.filter-tabs { display: flex; gap: 6px; margin-bottom: 10px; flex-wrap: wrap; }
.ftab {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.ftab:hover { background: var(--paper); }
.ftab.active { background: var(--ink); border-color: var(--ink); color: #fff; }
.ftab .fcount {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  opacity: 0.75;
  margin-left: 4px;
  font-variant-numeric: tabular-nums;
}

.q-result-head {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-faint);
  font-weight: 600;
  background: none !important;
}
.q-result.skipped .qn { color: var(--ink-faint); }
.q-result.skipped .given em { color: var(--ink-faint); font-style: italic; }

@media (max-width: 640px) {
  .group-row { grid-template-columns: 1fr; gap: 4px; }
  .group-score { text-align: left; }
}
.q-result {
  display: grid;
  grid-template-columns: 44px 1fr 1fr;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  align-items: center;
}
.q-result:nth-child(odd) { background: var(--paper); }
.q-result .qn {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.q-result.correct .qn { color: var(--good); }
.q-result.incorrect .qn { color: var(--bad); }
.q-result .given { color: var(--ink); }
.q-result.incorrect .given { color: var(--bad); text-decoration: line-through; text-decoration-thickness: 1px; }
.q-result .expected { color: var(--ink-soft); }
.q-result .expected::before { content: "correct: "; color: var(--ink-faint); font-size: 0.8rem; }

/* Writing feedback */
.criteria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin: 18px 0;
}
.criterion {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px;
  background: var(--paper);
}
.criterion .label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-faint); font-weight: 600; }
.criterion .value { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--band); }
.feedback-text { line-height: 1.7; color: var(--ink-soft); }

/* ---------- Dashboard ---------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-1);
}
.stat-card .label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-faint); font-weight: 600; }
.stat-card .value { font-family: var(--font-display); font-size: 1.7rem; font-weight: 700; margin-top: 2px; }
.stat-card .value.band { color: var(--band); }

table.history {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}
table.history th {
  text-align: left;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-faint);
  font-weight: 600;
  padding: 12px 16px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
table.history td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}
table.history tr:last-child td { border-bottom: none; }
table.history .mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: 0.85rem; }
.section-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  text-transform: capitalize;
}

/* ---------- Empty & loading states ---------- */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  background: var(--surface);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink-soft);
}
.empty-state h3 { font-family: var(--font-display); margin: 0 0 6px; color: var(--ink); }
.empty-state code {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
}
.loading {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-faint);
  padding: 48px 0;
  justify-content: center;
}
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--line);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(22, 35, 59, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 26px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-2);
}
.modal h3 { font-family: var(--font-display); margin: 0 0 8px; }
.modal p { color: var(--ink-soft); margin: 0 0 20px; }
.modal .modal-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  box-shadow: var(--shadow-2);
  z-index: 200;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .exam-shell { flex-direction: column; }
  .exam-material, .exam-answers { max-height: none; width: 100%; }
  .exam-bar { top: 60px; flex-wrap: wrap; gap: 10px; }
  .exam-bar-right { width: 100%; justify-content: space-between; }
  main { padding: 20px 16px 48px; }
}

/* ---------- Grouped answer sheet ---------- */
.sheet-group { margin-bottom: 20px; }
.sheet-group-head {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 8px;
  padding: 7px 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.sheet-group-range {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

/* ---------- Exit button ---------- */
.btn-exit {
  background: none;
  border: none;
  color: var(--ink-soft);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
.btn-exit:hover { background: var(--paper); color: var(--brand); }

/* ---------- Exam-condition audio player ---------- */
.audio-bar .btn-play {
  padding: 7px 14px;
  font-size: 0.82rem;
  white-space: nowrap;
}
.audio-bar .btn-play:disabled {
  background: var(--paper);
  color: var(--ink-faint);
  border: 1px solid var(--line);
  cursor: default;
}
.audio-progress {
  flex: 1;
  height: 6px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.audio-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--navy-btn);
  border-radius: 999px;
  transition: width 0.4s linear;
}
.audio-time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  min-width: 90px;
  text-align: right;
}

/* ---------- Sample answers ---------- */
.sample-note { color: var(--ink-soft); font-size: 0.9rem; margin: 0 0 12px; }
.sample-pages img {
  width: 100%;
  display: block;
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

/* ---------- Text view (extracted content) ---------- */
.view-toggle {
  display: inline-flex;
  gap: 2px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  margin-bottom: 12px;
}
.vt-btn {
  border: none;
  background: none;
  padding: 6px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  border-radius: 999px;
  cursor: pointer;
}
.vt-btn.active { background: var(--ink); color: #fff; }

.passage-block { margin-bottom: 28px; }
.passage-head {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  padding: 7px 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}
.content-text {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  padding: 4px 8px;
}
.content-text p { margin: 0 0 14px; }

.inline-q {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  margin: 0 2px;
}
.inline-qnum {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  background: var(--navy-btn);
  border-radius: 4px;
  padding: 1px 5px;
  transform: translateY(-1px);
}
.inline-input {
  border: none;
  border-bottom: 2px solid var(--line-strong);
  background: var(--paper);
  border-radius: 4px 4px 0 0;
  padding: 2px 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  width: 130px;
  color: var(--ink);
}
.inline-input:focus {
  outline: none;
  border-bottom-color: var(--focus);
  background: #fff;
}

/* ---------- Content block hierarchy (reading/listening text view) ---------- */
.q-range-head {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--navy-btn);
  margin: 18px 0 6px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.content-text > .q-range-head:first-child { border-top: none; padding-top: 0; margin-top: 0; }

.q-instruction {
  font-style: italic;
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin: 0 0 12px;
}

.para-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--navy-btn);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  margin: 10px 0 6px;
}

.unmarked-note {
  background: var(--band-soft);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 1.6;
}
.unmarked-note code { font-family: var(--font-mono); font-size: 0.82em; }

/* ---------- Answer-key page viewer (manual comparison) ---------- */
.key-page-toggle { margin: 18px 0; }
.btn-key-page {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}
.btn-key-page:hover { background: var(--surface); border-color: var(--navy-btn); }
.key-page-viewer {
  margin: 12px 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.key-page-viewer img { width: 100%; display: block; }

/* ---------- Band explanation modal ---------- */
.modal-wide { max-width: 520px; width: 92%; }
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}
.modal-x {
  background: none;
  border: none;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--ink-faint);
  cursor: pointer;
  padding: 0 4px;
}
.modal-x:hover { color: var(--ink); }
.band-calc-note { font-size: 0.9rem; color: var(--ink-soft); margin: 0 0 10px; }
.band-calc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-top: 8px;
}
.band-calc-table th {
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  padding: 6px 8px;
  border-bottom: 1px solid var(--line);
}
.band-calc-table td { padding: 6px 8px; border-bottom: 1px solid var(--line); }
.band-calc-table tr.matched-row { background: var(--band-soft); font-weight: 700; }
.band-calc-table .match-tag { color: var(--brand); font-size: 0.8rem; white-space: nowrap; }

.band-chip-clickable { cursor: pointer; }
.band-chip-clickable:hover { filter: brightness(0.95); text-decoration: underline; }

/* ---------- Manual score entry ---------- */
.manual-score-box {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin: 18px 0;
  background: var(--paper);
}
.manual-score-box h4 { margin: 0 0 4px; font-size: 0.95rem; }
.manual-score-box p { margin: 0 0 12px; font-size: 0.86rem; color: var(--ink-soft); }
.manual-score-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.manual-score-row input {
  width: 70px;
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  text-align: center;
}
.manual-score-row span { font-size: 0.88rem; color: var(--ink-soft); }
.manual-score-error { color: var(--bad); font-size: 0.85rem; margin: 10px 0 0; }
.manual-score-done { font-size: 0.9rem; margin: 12px 0 0; }

.btn-enter-score {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.btn-enter-score:hover { border-color: var(--navy-btn); }