/* ═══════════════════════════════════════════════════════════════════════
   HSKK Exam — Liquid Glass Design System (macOS 26 / visionOS)
   Clean, airy, depth-aware interface with translucent materials
   ═══════════════════════════════════════════════════════════════════════ */

/* ─── Design Tokens ─────────────────────────────────────────────────── */
:root {
  /* Surface materials */
  --glass-bg: var(--qmf-bg-primary, rgba(255, 255, 255, 0.72));
  --glass-bg-thick: var(--qmf-bg-primary, rgba(255, 255, 255, 0.88));
  --glass-bg-thin: var(--qmf-bg-secondary, rgba(255, 255, 255, 0.52));
  --glass-border: var(--qmf-border, rgba(255, 255, 255, 0.45));
  --glass-shadow: 0 2px 24px rgba(0, 0, 0, 0.06), 0 0 0 0.5px rgba(0, 0, 0, 0.04);
  --glass-shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08), 0 0 0 0.5px rgba(0, 0, 0, 0.04);
  --glass-blur: blur(40px) saturate(1.8);

  /* Tints */
  --tint-blue: var(--qmf-accent-primary-soft, rgba(0, 122, 255, 0.12));
  --tint-green: var(--qmf-accent-success-soft, rgba(52, 199, 89, 0.12));
  --tint-red: var(--qmf-accent-danger-soft, rgba(255, 59, 48, 0.12));
  --tint-orange: var(--qmf-accent-warning-soft, rgba(255, 149, 0, 0.12));
  --tint-indigo: rgba(88, 86, 214, 0.12);

  /* Solid accents */
  --accent: var(--qmf-accent-primary, #007aff);
  --accent-green: var(--qmf-accent-success, #30d158);
  --accent-red: var(--qmf-accent-danger, #ff453a);
  --accent-orange: var(--qmf-accent-warning, #ff9f0a);
  --accent-indigo: #5856d6;

  /* Typography */
  --text-1: var(--qmf-text-primary, #1d1d1f);
  --text-2: var(--qmf-text-secondary, #636366);
  --text-3: var(--qmf-text-muted, #aeaeb2);
  --text-inverse: #ffffff;

  /* Surfaces */
  --page-bg: var(--qmf-bg-secondary, #f2f2f7);
  --card-radius: 20px;
  --pill-radius: 100px;
  --input-radius: 14px;
  --transition: 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Dark Mode ─────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --glass-bg: var(--qmf-bg-primary, rgba(44, 44, 46, 0.72));
  --glass-bg-thick: var(--qmf-bg-primary, rgba(44, 44, 46, 0.88));
  --glass-bg-thin: var(--qmf-bg-secondary, rgba(44, 44, 46, 0.52));
  --glass-border: var(--qmf-border, rgba(255, 255, 255, 0.08));
  --glass-shadow: 0 2px 24px rgba(0, 0, 0, 0.24), 0 0 0 0.5px rgba(255, 255, 255, 0.04);
  --glass-shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.32), 0 0 0 0.5px rgba(255, 255, 255, 0.04);

  --tint-blue: var(--qmf-accent-primary-soft, rgba(10, 132, 255, 0.18));
  --tint-green: var(--qmf-accent-success-soft, rgba(48, 209, 88, 0.18));
  --tint-red: var(--qmf-accent-danger-soft, rgba(255, 69, 58, 0.18));
  --tint-orange: var(--qmf-accent-warning-soft, rgba(255, 159, 10, 0.18));
  --tint-indigo: rgba(94, 92, 230, 0.18);

  --accent: var(--qmf-accent-primary, #0a84ff);
  --accent-green: var(--qmf-accent-success, #30d158);
  --accent-red: var(--qmf-accent-danger, #ff453a);
  --accent-orange: var(--qmf-accent-warning, #ff9f0a);
  --accent-indigo: #5e5ce6;

  --text-1: var(--qmf-text-primary, #f5f5f7);
  --text-2: var(--qmf-text-secondary, #a1a1a6);
  --text-3: var(--qmf-text-muted, #636366);
  --text-inverse: #1d1d1f;

  --page-bg: var(--qmf-bg-secondary, #1c1c1e);
}

/* ─── Page Foundation ───────────────────────────────────────────────── */
.exam-container {
  max-width: 860px;
  margin: 88px auto 48px;
  padding: 0 24px;
  color: var(--text-1);
}

/* ─── Exam List View ────────────────────────────────────────────────── */
.exam-list-view {
  text-align: center;
}

.exam-list-view h1 {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--text-1);
  margin-bottom: 6px;
}

.exam-list-view > p {
  font-size: 17px;
  color: var(--text-2);
  margin-bottom: 8px;
}

.exams-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

/* ─── Glass Card (exam card injected by JS) ─────────────────────────── */
.exam-card,
.glass-card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 0.5px solid var(--glass-border);
  border-radius: var(--card-radius);
  box-shadow: var(--glass-shadow);
  padding: 24px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.exam-card:hover,
.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow-lg);
}

/* ─── Exam View (question panel) ────────────────────────────────────── */
.exam-view {
  background: var(--glass-bg-thick);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 0.5px solid var(--glass-border);
  border-radius: var(--card-radius);
  box-shadow: var(--glass-shadow-lg);
  padding: 32px;
}

.exam-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.exam-header h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-1);
  margin: 0;
}

.timer {
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent-orange);
  background: var(--tint-orange);
  padding: 6px 16px;
  border-radius: var(--pill-radius);
}

/* ─── Progress Bar ──────────────────────────────────────────────────── */
.progress-bar {
  background: var(--tint-blue);
  height: 36px;
  border-radius: var(--pill-radius);
  position: relative;
  margin-bottom: 28px;
  overflow: hidden;
}

.progress-fill {
  background: linear-gradient(90deg, var(--accent), var(--accent-indigo));
  height: 100%;
  border-radius: var(--pill-radius);
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-bar span {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-1);
  white-space: nowrap;
}

/* ─── Question Container ────────────────────────────────────────────── */
.question-container {
  min-height: 260px;
  padding: 28px;
  background: var(--glass-bg-thin);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  backdrop-filter: blur(20px) saturate(1.4);
  border: 0.5px solid var(--glass-border);
  border-radius: 16px;
  margin-bottom: 24px;
}

.question-prompt {
  font-size: 19px;
  line-height: 1.65;
  color: var(--text-1);
  margin-bottom: 16px;
}

/* ─── Buttons — Liquid Capsules ─────────────────────────────────────── */
.exam-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-record, .btn-stop, .btn-next, .btn-submit,
.btn-primary, .btn-secondary {
  padding: 14px 28px;
  border: none;
  border-radius: var(--pill-radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.btn-record {
  background: var(--accent-green);
  color: var(--text-inverse);
  box-shadow: 0 4px 16px rgba(48, 209, 88, 0.3);
}
.btn-record:hover {
  box-shadow: 0 6px 24px rgba(48, 209, 88, 0.4);
  transform: translateY(-1px);
}
.btn-record.recording {
  background: var(--accent-red);
  box-shadow: 0 4px 16px rgba(255, 69, 58, 0.35);
  animation: pulse-glow 1.6s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 4px 16px rgba(255, 69, 58, 0.35); }
  50% { box-shadow: 0 4px 28px rgba(255, 69, 58, 0.55); }
}

.btn-stop {
  background: var(--accent-red);
  color: var(--text-inverse);
  box-shadow: 0 4px 16px rgba(255, 69, 58, 0.25);
}
.btn-stop:hover {
  box-shadow: 0 6px 24px rgba(255, 69, 58, 0.35);
  transform: translateY(-1px);
}

.btn-next {
  background: var(--accent);
  color: var(--text-inverse);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.25);
}
.btn-next:hover {
  box-shadow: 0 6px 24px rgba(0, 122, 255, 0.35);
  transform: translateY(-1px);
}

.btn-submit {
  background: var(--accent-orange);
  color: var(--text-inverse);
  box-shadow: 0 4px 16px rgba(255, 149, 0, 0.25);
}
.btn-submit:hover {
  box-shadow: 0 6px 24px rgba(255, 149, 0, 0.35);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(0, 122, 255, 0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text-1);
  border: 0.5px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}
.btn-secondary:hover {
  background: var(--glass-bg-thick);
  transform: translateY(-1px);
}

/* ─── Result View ───────────────────────────────────────────────────── */
.result-view {
  text-align: center;
  padding: 48px 24px;
}

.result-view h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-1);
}

.success-icon {
  font-size: 64px;
  color: var(--accent-green);
  margin-bottom: 16px;
}

/* ─── Audio Player (native <audio controls>) ────────────────────────── */
.audio-playback {
  margin-top: 16px;
}
.audio-playback audio {
  width: 100%;
  border-radius: 12px;
}

/* ─── Recording Indicator ───────────────────────────────────────────── */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

/* ─── Exam Settings (grading mode / auto-record) ────────────────────── */
.exam-settings,
.glass-panel {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 0.5px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: var(--glass-shadow);
  padding: 24px;
  margin-bottom: 24px;
}

.exam-settings h3 {
  margin: 0 0 16px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-1);
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.radio-option,
.checkbox-option {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: 10px 14px;
  border-radius: 12px;
  transition: background var(--transition);
}
.radio-option:hover,
.checkbox-option:hover {
  background: var(--tint-blue);
}

.radio-option input[type="radio"],
.checkbox-option input[type="checkbox"] {
  margin-right: 8px;
  accent-color: var(--accent);
}

.radio-option label,
.checkbox-option label {
  cursor: pointer;
  font-size: 14px;
  color: var(--text-1);
}

.setting-label {
  display: block;
  margin-bottom: 10px;
  font-weight: 500;
  font-size: 14px;
  color: var(--text-2);
}

.setting-group {
  margin-bottom: 20px;
}
.setting-group:last-child {
  margin-bottom: 0;
}

/* ─── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .exam-container {
    margin: 76px auto 24px;
    padding: 0 16px;
  }
  .exam-list-view h1 { font-size: 26px; }
  .exams-grid { grid-template-columns: 1fr; gap: 12px; }

  .exam-view { padding: 20px; }
  .exam-header {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
  .exam-header h2 { font-size: 19px; }
  .timer { font-size: 18px; }

  .question-container { padding: 20px; min-height: 180px; }
  .question-prompt { font-size: 17px; }

  .exam-controls { flex-direction: column; gap: 10px; }
  .btn-record, .btn-stop, .btn-next, .btn-submit,
  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
  }

  .result-view { padding: 32px 16px; }
}

@media (max-width: 480px) {
  .exam-container { margin: 64px auto 20px; }
  .exam-list-view h1 { font-size: 22px; }
  .progress-bar { height: 30px; }
  .progress-bar span { font-size: 12px; }
}