/* ── Quiz Page Styles — Sage Theme ── */
:root {
  --primary: #62B85E;
  --primary-dark: #4C9948;
  --primary-light: #88CF85;
  --correct: #66BB6A;
  --correct-light: #D8EBD7;
  --wrong: #E57373;
  --wrong-light: #FCE8E6;
  --bg: #F9F9F6;
  --card-bg: #FFFFFF;
  --border: #D8EBD7;
  --text: #2A4A28;
  --text-muted: #3A3A3A;
  --shadow: 0 2px 8px rgba(74, 148, 70, 0.12);
  --radius: 16px;
  --primary-light-bg: #F3F8F2;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-top: 56px; /* nav bar height */
}

.quiz-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px 80px;
}

/* ── Header ── */
.quiz-header {
  text-align: center;
  margin-bottom: 24px;
}
.quiz-header h1 {
  font-size: 1.6rem;
  color: var(--text);
}
.quiz-header p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Band Selector ── */
.band-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  justify-content: center;
}
.band-btn {
  padding: 10px 20px;
  border: 2px solid var(--border);
  border-radius: 24px;
  background: var(--card-bg);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.2s;
}
.band-btn:hover { border-color: var(--primary); color: var(--primary); }
.band-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ── Progress Bar ── */
.progress-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.progress-track {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.3s ease;
}
.progress-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.streak-badge {
  font-size: 1.1rem;
}

/* ── Question Card ── */
.question-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 24px;
  margin-bottom: 16px;
  transition: transform 0.2s;
}
.question-card.answered { transform: scale(0.99); }

.question-type-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.question-prompt {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 24px;
  line-height: 1.5;
}

/* ── Choices ── */
.choices {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.choice {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  background: var(--card-bg);
  transition: all 0.15s;
  user-select: none;
}
.choice:hover { border-color: var(--primary); background: var(--primary-light); }
.choice.selected { border-color: var(--primary); background: var(--primary-light); }
.choice.correct {
  border-color: var(--correct);
  background: var(--correct-light);
}
.choice.wrong {
  border-color: var(--wrong);
  background: var(--wrong-light);
}
.choice.disabled { pointer-events: none; opacity: 0.7; }

.choice-marker {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}
.choice.correct .choice-marker {
  background: var(--correct);
  border-color: var(--correct);
  color: white;
}
.choice.wrong .choice-marker {
  background: var(--wrong);
  border-color: var(--wrong);
  color: white;
}

.choice-text {
  flex: 1;
  font-size: 1.05rem;
}

/* ── Post-answer feedback ── */
.feedback {
  margin-top: 20px;
  padding: 16px;
  border-radius: 10px;
  background: var(--primary-light);
  display: none;
}
.feedback.show { display: block; }
.feedback-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: 8px;
}
.feedback-zh {
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 8px;
}
.feedback-example {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
}
.feedback-example-zh {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.feedback-ipa {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.feedback-defs {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.feedback-def {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* ── Action buttons ── */
.action-row {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}
.btn {
  flex: 1;
  padding: 12px 20px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
  background: var(--card-bg);
  color: var(--text);
  border: 2px solid var(--border);
}
.btn-secondary:hover { border-color: var(--primary); }

/* ── Results screen ── */
.results-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 24px;
  text-align: center;
}
.results-card h2 { font-size: 1.5rem; margin-bottom: 8px; }
.results-score {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  margin: 16px 0;
}
.results-breakdown {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.results-stat { text-align: center; }
.results-stat-value { font-size: 1.4rem; font-weight: 700; }
.results-stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* ── Loading ── */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
}
.loading .spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Empty state ── */
.empty-state {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
}

/* ── User bar ── */
.user-bar {
  display: flex;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--primary-light);
  border-radius: 10px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

/* ── Auth form inputs ── */
input[type="email"], input[type="password"], input[type="tel"] {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
  font-size: 1rem;
  box-sizing: border-box;
  font-family: inherit;
}
input:focus {
  outline: none;
  border-color: var(--primary);
}

/* ── Responsive ── */
@media (max-width: 480px) {
  .quiz-container { padding: 16px 12px 60px; }
  .question-prompt { font-size: 1.1rem; }
  .choice { padding: 12px 14px; }
  .choice-text { font-size: 0.95rem; }
  .results-score { font-size: 2rem; }
}