/* Bonjour — French Pronunciation & Speaking Lab */
:root {
  --bg-main: #090e1a;
  --bg-surface: #10192e;
  --bg-card: #15223d;
  --bg-highlight: #1e2f52;
  --border-subtle: #233557;
  --border-focus: #3b82f6;
  --primary-blue: #3b82f6;
  --primary-hover: #2563eb;
  --french-red: #e11d48;
  --accent-gold: #f59e0b;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 60px;
}

/* Background Parisian Texture */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 50% 0%, rgba(59, 130, 246, 0.12) 0%, transparent 70%),
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.app-container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 24px 20px;
  position: relative;
  z-index: 1;
}

/* Header */
header.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.flag-icon {
  width: 32px;
  height: 24px;
  border-radius: 4px;
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.4);
  display: flex;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.2);
}
.flag-blue { flex: 1; background: #002395; }
.flag-white { flex: 1; background: #ffffff; }
.flag-red { flex: 1; background: #ed2939; }

h1.brand-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Header Stats Badge */
.header-stats {
  display: flex;
  gap: 12px;
  align-items: center;
}

.stat-pill {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-family: var(--font-mono);
}

.stat-pill strong { color: var(--accent-gold); }

/* Navigation Tabs */
nav.app-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 28px;
  overflow-x: auto;
  padding-bottom: 6px;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
  white-space: nowrap;
  min-height: 44px;
}

.tab-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.tab-btn.active {
  background: var(--primary-blue);
  color: #ffffff;
  border-color: var(--primary-blue);
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
}

/* View Sections */
.view-section {
  display: none;
  animation: fadeIn 0.25s ease-out;
}
.view-section.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── SHADOWING & SPEAK VIEW ── */
.shadowing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: 4px 4px 0px rgba(0,0,0,0.4);
  margin-bottom: 24px;
  position: relative;
}

.phrase-level-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.target-french {
  font-family: var(--font-serif);
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.target-ipa {
  font-family: var(--font-mono);
  font-size: 14px;
  color: #38bdf8;
  margin-bottom: 12px;
}

.target-english {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 18px;
  line-height: 1.5;
}

.pronunciation-tip-box {
  background: rgba(245, 158, 11, 0.08);
  border-left: 3px solid var(--accent-gold);
  padding: 10px 14px;
  border-radius: 0 4px 4px 0;
  font-size: 13px;
  color: #fde68a;
  margin-bottom: 24px;
}

/* Audio & Mic Controls */
.controls-deck {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-primary-audio, .btn-primary-mic, .btn-action {
  min-height: 46px;
  min-width: 44px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary-audio {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}
.btn-primary-audio:hover {
  background: var(--bg-highlight);
  border-color: var(--primary-blue);
}

.btn-primary-mic {
  background: var(--french-red);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(225, 29, 72, 0.35);
}
.btn-primary-mic:hover { background: #be123c; }
.btn-primary-mic.recording {
  background: #f43f5e;
  animation: pulseMic 1.2s infinite;
}

@keyframes pulseMic {
  0% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.6); }
  70% { box-shadow: 0 0 0 14px rgba(244, 63, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0); }
}

.speed-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.speed-toggle-btn:hover { color: var(--text-primary); border-color: var(--text-muted); }

/* Feedback & Waveform */
.feedback-console {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  display: none;
}
.feedback-console.visible { display: block; }

.score-display-row {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.grade-badge {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
}

.score-meter-wrap {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.score-metric strong { color: var(--primary-blue); }

.recognized-speech-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.words-diff-row span.word-ok { color: #4ade80; font-weight: 600; margin-right: 6px; }
.words-diff-row span.word-close { color: #facc15; margin-right: 6px; }
.words-diff-row span.word-miss { color: #f87171; text-decoration: line-through; margin-right: 6px; }
.words-diff-row span.word-extra { color: #94a3b8; font-style: italic; margin-right: 6px; }

/* ── ALPHABET & PRONUNCIATION VIEW ── */
.section-intro {
  margin-bottom: 24px;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.section-desc {
  font-size: 14px;
  color: var(--text-muted);
}

.alphabet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 36px;
}

.letter-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.letter-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-blue);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.letter-glyph {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 2px;
}
.letter-name {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}
.letter-example {
  font-size: 12px;
  color: #93c5fd;
  font-style: italic;
}

/* Pronunciation Explanations */
.rules-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.rule-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.rule-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.rule-explanation {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

.rule-examples-flex {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.example-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.example-pill:hover {
  border-color: var(--primary-blue);
  color: #93c5fd;
}
.example-pill .ipa {
  font-family: var(--font-mono);
  color: #38bdf8;
  font-size: 11px;
}

/* ── DRILLS & QUIZ VIEW ── */
.quiz-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.question-stem {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: #ffffff;
  margin-bottom: 24px;
}

.options-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.option-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-align: left;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.15s ease;
  min-height: 48px;
}
.option-btn:hover {
  border-color: var(--primary-blue);
  background: var(--bg-highlight);
}
.option-btn.correct {
  background: rgba(34, 197, 94, 0.15);
  border-color: #22c55e;
  color: #86efac;
}
.option-btn.wrong {
  background: rgba(239, 68, 68, 0.15);
  border-color: #ef4444;
  color: #fca5a5;
}

.drill-feedback {
  background: rgba(59, 130, 246, 0.1);
  border-left: 3px solid var(--primary-blue);
  padding: 14px 18px;
  font-size: 14px;
  color: #bfdbfe;
  line-height: 1.6;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  display: none;
  margin-bottom: 20px;
}
.drill-feedback.visible { display: block; }

/* Responsive adjustments */
@media (max-width: 640px) {
  .app-container { padding: 16px 14px; }
  .shadowing-card { padding: 22px 18px; }
  .alphabet-grid { grid-template-columns: repeat(2, 1fr); }
  .btn-primary-audio, .btn-primary-mic, .btn-action { width: 100%; }
}