/* Extends styles.css + landing.css for the quiz-taking page (public/quiz.html).
   Reuses the app-header/.btn tokens from landing.css rather than a third
   visual language. */

.quiz-page { padding-top: 22px; padding-bottom: 100px; }
.quiz-status { color: var(--text-muted); font-size: 0.9rem; }
.quiz-status.error { color: var(--error); }

/* ---------- Setup panel (difficulty / mix / length, before an attempt starts) ---------- */
.setup-card {
  max-width: 640px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}
.setup-card h1 { margin: 0 0 6px; font-size: 1.25rem; color: var(--navy); }
@media (prefers-color-scheme: dark) { .setup-card h1 { color: var(--gold-light); } }
.setup-card .lede { color: var(--text-muted); font-size: 0.88rem; margin: 0 0 22px; }

.setup-group { margin-bottom: 20px; }
.setup-group h3 { margin: 0 0 10px; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }
.setup-options { display: flex; gap: 10px; flex-wrap: wrap; }
.setup-opt {
  flex: 1 1 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  text-align: center;
}
.setup-opt span { font-size: 0.72rem; font-weight: 500; color: var(--text-muted); }
.setup-opt:hover { border-color: var(--gold); }
.setup-opt.selected { border-color: var(--gold); background: rgba(200, 150, 46, 0.08); }
.setup-opt.selected span { color: var(--text); }

.setup-start-btn { width: 100%; margin-top: 6px; padding: 12px; font-size: 0.95rem; }

.quiz-topbar {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 20px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 20px;
}
.quiz-topbar h1 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--navy);
  flex: 1 1 220px;
}
@media (prefers-color-scheme: dark) { .quiz-topbar h1 { color: var(--gold-light); } }

.marking-banner { font-size: 0.82rem; color: var(--text-muted); white-space: nowrap; }
.marking-sep { margin: 0 8px; color: var(--border); }
.mark-chip { font-weight: 800; border-radius: 6px; padding: 2px 8px; }
.mark-chip.mark-pos { background: rgba(26, 127, 55, 0.12); color: var(--success); }
.mark-chip.mark-neg { background: rgba(179, 38, 30, 0.1); color: var(--error); }

.subject-chip {
  background: var(--navy);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 999px;
  padding: 5px 12px;
}

.quiz-body { display: grid; grid-template-columns: 1fr 280px; gap: 16px; align-items: start; }

.quiz-main {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  min-height: 360px;
}

.quiz-lock-banner {
  background: rgba(200, 150, 46, 0.1);
  border: 1px solid rgba(200, 150, 46, 0.35);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.85rem;
  color: var(--navy);
}
@media (prefers-color-scheme: dark) { .quiz-lock-banner { color: var(--gold-light); } }
.quiz-lock-banner a { color: var(--gold); font-weight: 700; }

#question-heading { margin: 0 0 12px; font-size: 0.95rem; color: var(--text-muted); font-weight: 700; }
.question-body { font-size: 1.02rem; line-height: 1.55; margin: 0 0 20px; }

.option-list { display: flex; flex-direction: column; gap: 10px; }
.option-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
  color: var(--text);
  cursor: pointer;
}
.option-row:hover { border-color: var(--gold); }
.option-row.selected { border-color: var(--gold); background: rgba(200, 150, 46, 0.08); }
.option-key {
  flex: none;
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem; font-weight: 800;
}
.option-row.selected .option-key { background: var(--gold); color: #241a00; border-color: var(--gold); }
.option-text { flex: 1; padding-top: 3px; }

.quiz-inline-status { min-height: 1.2em; margin: 14px 0 0; font-size: 0.85rem; color: var(--text-muted); }
.quiz-inline-status.error { color: var(--error); }

.quiz-palette {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  position: sticky;
  top: 76px;
}
.quiz-palette h3 { margin: 0 0 2px; font-size: 0.9rem; color: var(--navy); }
@media (prefers-color-scheme: dark) { .quiz-palette h3 { color: var(--gold-light); } }
.palette-hint { margin: 0 0 12px; font-size: 0.76rem; color: var(--text-muted); }

.palette-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-bottom: 16px; }
.palette-cell {
  aspect-ratio: 1;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
}
.palette-cell.current { outline: 2px solid var(--navy); outline-offset: 1px; }
@media (prefers-color-scheme: dark) { .palette-cell.current { outline-color: var(--gold-light); } }
.palette-cell.answered { background: var(--success); border-color: var(--success); color: #fff; }
.palette-cell.unanswered { background: var(--error); border-color: var(--error); color: #fff; }
.palette-cell.review { background: var(--gold); border-color: var(--gold); color: #241a00; }
.palette-cell.locked { color: var(--chip-off-text); }

.palette-legend { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; font-size: 0.76rem; color: var(--text-muted); }
.palette-legend .dot { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 8px; border: 1px solid var(--border); }
.palette-legend .dot.answered { background: var(--success); border-color: var(--success); }
.palette-legend .dot.unanswered { background: var(--error); border-color: var(--error); }
.palette-legend .dot.review { background: var(--gold); border-color: var(--gold); }
.palette-legend .dot.not-visited { background: transparent; }

.quiz-actionbar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 16px rgba(10, 27, 77, 0.08);
  padding: 12px 20px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  flex-wrap: wrap;
  z-index: 50;
}
.quiz-actionbar #prev-btn { margin-right: auto; }

@media (max-width: 760px) {
  .quiz-body { grid-template-columns: 1fr; }
  .quiz-palette { position: static; }
  .quiz-actionbar { justify-content: center; }
  .quiz-actionbar #prev-btn { margin-right: 0; }
}

/* ---------- Result view ---------- */
.result-card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}
.result-card h1 { margin: 0 0 6px; font-size: 1.3rem; color: var(--navy); }
@media (prefers-color-scheme: dark) { .result-card h1 { color: var(--gold-light); } }

.result-summary { margin-bottom: 12px; }
.score-line { font-size: 1.15rem; font-weight: 800; color: var(--navy); }
@media (prefers-color-scheme: dark) { .score-line { color: var(--gold-light); } }
.score-breakdown { font-size: 0.86rem; color: var(--text-muted); margin-top: 4px; }

.result-percentile { font-size: 0.86rem; color: var(--text-muted); margin: 0 0 20px; }

.result-by-concept { margin-bottom: 22px; }
.result-by-concept h2 { margin: 0 0 12px; font-size: 0.95rem; color: var(--navy); }
@media (prefers-color-scheme: dark) { .result-by-concept h2 { color: var(--gold-light); } }
.concept-bar-list { display: flex; flex-direction: column; gap: 12px; }
.concept-bar-label { display: flex; justify-content: space-between; font-size: 0.82rem; margin-bottom: 4px; }
.concept-bar-track { background: var(--chip-off-bg); border-radius: 999px; height: 8px; overflow: hidden; }
.concept-bar-fill { background: var(--gold); height: 100%; border-radius: 999px; }

.result-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.result-answers { display: flex; flex-direction: column; gap: 12px; margin-bottom: 22px; }
.result-row { border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.result-row.correct { border-left: 4px solid var(--success); }
.result-row.wrong { border-left: 4px solid var(--error); }
.result-row.unattempted { border-left: 4px solid var(--chip-off-text); }
.result-row-head { display: flex; justify-content: space-between; font-size: 0.78rem; font-weight: 800; color: var(--text-muted); margin-bottom: 6px; }
.result-marks { color: var(--text); }
.result-body { margin: 0 0 6px; font-size: 0.9rem; }
.result-answer { margin: 0 0 10px; font-size: 0.82rem; color: var(--text-muted); }

/* ---------- AI Tutor — teacher avatar + "talking" explanation bubble ---------- */
.tutor-block { display: flex; align-items: flex-start; gap: 10px; margin-top: 8px; }

.tutor-avatar { flex: none; width: 52px; height: 52px; }
.tutor-avatar svg { width: 100%; height: 100%; display: block; }

/* Two-frame mouth toggle (closed <-> open). Resting state is closed-mouth-
   visible by default; .talking plays a handful of finite cycles (not an
   infinite loop) and, via animation-fill-mode:forwards, ends holding that
   exact same resting frame — so it settles into a smile instead of
   animating forever on a static result page. */
.mouth-open { opacity: 0; }
.mouth-closed { opacity: 1; }
@keyframes tutor-mouth-open {
  0%, 100% { opacity: 0; }
  25%, 75% { opacity: 1; }
}
@keyframes tutor-mouth-closed {
  0%, 100% { opacity: 1; }
  25%, 75% { opacity: 0; }
}
.tutor-avatar.talking .mouth-open { animation: tutor-mouth-open 0.5s steps(1, end) 6 forwards; }
.tutor-avatar.talking .mouth-closed { animation: tutor-mouth-closed 0.5s steps(1, end) 6 forwards; }

/* A subtle head tilt while talking, resting still otherwise. */
@keyframes tutor-nod {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(-2deg); }
}
.tutor-avatar.talking .tutor-head-group { animation: tutor-nod 1.5s ease-in-out 2; transform-origin: 50% 65%; }

.tutor-bubble {
  position: relative;
  flex: 1;
  min-width: 0;
  background: var(--navy-pale);
  border-radius: 12px;
  border-top-left-radius: 4px;
  padding: 10px 14px;
}
@media (prefers-color-scheme: dark) { .tutor-bubble { background: rgba(241, 203, 107, 0.08); } }
.tutor-name {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--gold);
  margin: 0 0 4px;
}
.tutor-text { margin: 0; font-size: 0.85rem; line-height: 1.5; color: var(--text); }

.tutor-feedback { display: flex; gap: 6px; margin-top: 8px; }
.tutor-feedback-btn {
  border: 1px solid var(--border);
  background: transparent;
  border-radius: 8px;
  padding: 3px 9px;
  font-size: 0.82rem;
  cursor: pointer;
  line-height: 1.4;
}
.tutor-feedback-btn:hover { border-color: var(--gold); }
.tutor-feedback-btn.selected { border-color: var(--gold); background: rgba(200, 150, 46, 0.12); }
.tutor-feedback-btn:disabled { cursor: default; opacity: 0.6; }

/* ---------- Submit confirmation modal ---------- */
.quiz-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.quiz-modal[hidden] { display: none; }
.quiz-modal-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 24px;
  max-width: 420px;
  width: 100%;
}
.quiz-modal-card h2 { margin: 0 0 10px; font-size: 1.05rem; color: var(--navy); }
@media (prefers-color-scheme: dark) { .quiz-modal-card h2 { color: var(--gold-light); } }
.quiz-modal-card p { color: var(--text-muted); font-size: 0.88rem; margin: 0 0 18px; }
.quiz-modal-actions { display: flex; gap: 10px; justify-content: flex-end; }