/* ==========================================================================
   DEUTSCHLERNEN - HÖRVERSTEHEN STUDIO (LISTENING COMPREHENSION)
   telc Deutsch B1 Examination Audio Player, Timer & Synchronized Transcripts
   ========================================================================== */

:root {
  --hr-bg-primary: #0a0e17;
  --hr-bg-card: rgba(18, 24, 38, 0.82);
  --hr-bg-card-hover: rgba(26, 34, 53, 0.95);
  --hr-bg-input: rgba(15, 23, 42, 0.7);
  --hr-border-card: rgba(255, 255, 255, 0.08);
  --hr-border-accent: rgba(59, 130, 246, 0.35);

  --hr-text-main: #f8fafc;
  --hr-text-muted: #94a3b8;
  --hr-text-gold: #fbbf24;

  --hr-accent-primary: #3b82f6;
  --hr-accent-glow: rgba(59, 130, 246, 0.35);
  --hr-accent-success: #10b981;
  --hr-accent-danger: #ef4444;
  --hr-accent-warning: #f59e0b;
  --hr-accent-purple: #8b5cf6;

  --hr-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --hr-radius-sm: 8px;
  --hr-radius-md: 14px;
  --hr-radius-lg: 20px;
  --hr-radius-full: 9999px;
  --hr-transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  --hr-shadow-pop: 0 16px 36px -8px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.12);
}

[data-theme="light"], body.light-mode {
  --hr-bg-primary: #f8fafc;
  --hr-bg-card: rgba(255, 255, 255, 0.94);
  --hr-bg-card-hover: #ffffff;
  --hr-bg-input: #f1f5f9;
  --hr-border-card: rgba(0, 0, 0, 0.08);
  --hr-border-accent: rgba(59, 130, 246, 0.5);

  --hr-text-main: #0f172a;
  --hr-text-muted: #475569;
  --hr-text-gold: #b45309;

  --hr-shadow-pop: 0 16px 36px -8px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.08);
}

body.hr-body {
  margin: 0;
  padding: 0;
  background-color: var(--hr-bg-primary);
  background-image:
    radial-gradient(circle at 15% 15%, rgba(139, 92, 246, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(59, 130, 246, 0.1) 0%, transparent 45%);
  background-attachment: fixed;
  color: var(--hr-text-main);
  font-family: var(--hr-font-sans);
  line-height: 1.6;
  min-height: 100vh;
}

.hr-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 20px 80px;
}

/* Header & Top Bar */
.hr-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--hr-border-card);
  margin-bottom: 24px;
}

.hr-brand-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.hr-brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #8b5cf6, #6d28d9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
}

.hr-brand-title {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hr-brand-subtitle {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--hr-text-muted);
}

.hr-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--hr-text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: var(--hr-transition);
}

.hr-nav-link:hover, .hr-nav-link.active {
  color: var(--hr-text-main);
  background: var(--hr-bg-input);
  border-color: var(--hr-border-card);
}

/* Test Selector Bar */
.hr-test-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.hr-test-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.hr-test-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: var(--hr-bg-card);
  border: 1px solid var(--hr-border-card);
  border-radius: 9px;
  color: var(--hr-text-muted);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--hr-transition);
}

.hr-test-btn:hover {
  border-color: var(--hr-border-accent);
  color: var(--hr-text-main);
}

.hr-test-btn.active {
  background: var(--hr-accent-primary, #3b82f6);
  border-color: var(--hr-accent-primary, #3b82f6);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Part Tabs Bar */
.hr-part-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.hr-part-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background: var(--hr-bg-card);
  border: 1px solid var(--hr-border-card);
  border-radius: 9px;
  color: var(--hr-text-muted);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--hr-transition);
}

.hr-part-btn:hover {
  border-color: var(--hr-border-accent);
  color: var(--hr-text-main);
}

.hr-part-btn.active {
  background: var(--hr-accent-primary, #3b82f6);
  border-color: var(--hr-accent-primary, #3b82f6);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Main Split Grid */
.hr-layout-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 900px) {
  .hr-layout-grid {
    grid-template-columns: 1fr;
  }
}

.hr-card {
  background: var(--hr-bg-card);
  border: 1px solid var(--hr-border-card);
  border-radius: var(--hr-radius-lg);
  padding: 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* Audio Player Console */
.hr-player-console {
  background: var(--hr-bg-input);
  border: 1px solid var(--hr-border-card);
  border-radius: var(--hr-radius-md);
  padding: 20px;
  margin-bottom: 20px;
}

.hr-player-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.hr-player-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hr-btn-play {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--hr-radius-full);
  background: linear-gradient(135deg, #8b5cf6, #6d28d9);
  color: #ffffff;
  border: none;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.4);
  transition: var(--hr-transition);
}

.hr-btn-play:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(139, 92, 246, 0.5);
}

.hr-btn-play:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

.hr-play-badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--hr-radius-full);
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #c4b5fd;
}

/* Soundwave Equalizer Animation */
.hr-equalizer {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 24px;
  padding: 0 8px;
}

.hr-eq-bar {
  width: 4px;
  height: 6px;
  background: #8b5cf6;
  border-radius: 2px;
  transition: height 0.15s ease;
}

.hr-equalizer.playing .hr-eq-bar:nth-child(1) { animation: eqAnim 0.7s infinite alternate ease-in-out; }
.hr-equalizer.playing .hr-eq-bar:nth-child(2) { animation: eqAnim 0.5s 0.1s infinite alternate ease-in-out; }
.hr-equalizer.playing .hr-eq-bar:nth-child(3) { animation: eqAnim 0.8s 0.2s infinite alternate ease-in-out; }
.hr-equalizer.playing .hr-eq-bar:nth-child(4) { animation: eqAnim 0.6s 0.15s infinite alternate ease-in-out; }
.hr-equalizer.playing .hr-eq-bar:nth-child(5) { animation: eqAnim 0.9s 0.05s infinite alternate ease-in-out; }

@keyframes eqAnim {
  0% { height: 4px; }
  100% { height: 22px; }
}

/* Speed Selector */
.hr-speed-select {
  padding: 6px 10px;
  background: var(--hr-bg-card);
  border: 1px solid var(--hr-border-card);
  color: var(--hr-text-main);
  border-radius: var(--hr-radius-sm);
  font-size: 13px;
  font-weight: 700;
}

/* Question Items */
.hr-item-card {
  background: var(--hr-bg-input);
  border: 1px solid var(--hr-border-card);
  border-radius: var(--hr-radius-md);
  padding: 16px;
  margin-bottom: 14px;
  transition: var(--hr-transition);
}

.hr-item-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--hr-text-main);
}

.hr-options-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.hr-opt-btn {
  padding: 8px 16px;
  background: var(--hr-bg-card);
  border: 1px solid var(--hr-border-card);
  border-radius: var(--hr-radius-sm);
  color: var(--hr-text-muted);
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--hr-transition);
}

.hr-opt-btn:hover {
  color: var(--hr-text-main);
  border-color: var(--hr-border-accent);
}

.hr-opt-btn.selected {
  background: #8b5cf6;
  border-color: #7c3aed;
  color: #ffffff;
}

.hr-opt-btn.opt-correct {
  background: rgba(16, 185, 129, 0.25);
  border-color: var(--hr-accent-success);
  color: #34d399;
}

.hr-opt-btn.opt-wrong {
  background: rgba(239, 68, 68, 0.25);
  border-color: var(--hr-accent-danger);
  color: #f87171;
}

/* Transcript Box */
.hr-transcript-box {
  margin-top: 14px;
  padding: 14px;
  background: rgba(139, 92, 246, 0.08);
  border-left: 3px solid #8b5cf6;
  border-radius: 4px;
  font-size: 13px;
  line-height: 1.6;
}

.hr-evidence-highlight {
  background: rgba(251, 191, 36, 0.25);
  color: var(--hr-text-gold);
  padding: 2px 4px;
  border-radius: 2px;
  font-weight: 700;
}

.hr-btn-evidence-play:hover {
  background: rgba(251, 191, 36, 0.4) !important;
  transform: translateY(-1px);
}

/* German Question & Translation Display */
.hr-statement-de {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--hr-text-main);
  margin-bottom: 8px;
}

.hr-statement-trans {
  font-size: 13px;
  color: var(--hr-text-muted);
  background: rgba(59, 130, 246, 0.08);
  border-left: 3px solid var(--hr-accent-primary);
  border-radius: var(--hr-radius-sm);
  padding: 8px 12px;
  margin-bottom: 12px;
  line-height: 1.5;
  animation: hrFadeIn 0.2s ease-in-out;
}

.hr-trans-badge {
  display: inline-block;
  font-size: 10.5px;
  font-weight: 800;
  color: var(--hr-accent-primary);
  text-transform: uppercase;
  margin-right: 6px;
  background: rgba(59, 130, 246, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
}

.hr-btn-trans-toggle,
.hr-btn-transcript-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 32px;
  padding: 4px 10px;
  border-radius: var(--hr-radius-sm);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--hr-transition);
}

.hr-btn-trans-toggle {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid var(--hr-border-accent);
  color: var(--hr-accent-primary);
}

.hr-btn-trans-toggle:hover {
  background: rgba(59, 130, 246, 0.25);
  transform: translateY(-1px);
}

.hr-btn-transcript-toggle {
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: var(--hr-accent-purple);
}

.hr-btn-transcript-toggle:hover {
  background: rgba(139, 92, 246, 0.25);
  transform: translateY(-1px);
}

.hr-opt-btn.has-correct {
  border-color: var(--hr-accent-success);
  color: #34d399;
}

.hr-opt-btn.has-wrong {
  border-color: var(--hr-accent-danger);
  color: #f87171;
}

.hr-instruction-box {
  background: var(--hr-bg-input);
  border: 1px solid var(--hr-border-card);
  border-radius: var(--hr-radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
}

.hr-instruction-main {
  font-size: 14px;
  font-weight: 600;
  color: var(--hr-text-main);
  line-height: 1.55;
}

.hr-instruction-trans {
  font-size: 12.5px;
  color: var(--hr-text-muted);
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed var(--hr-border-card);
  line-height: 1.5;
}

@keyframes hrFadeIn {
  from { opacity: 0; transform: translateY(-3px); }
  to { opacity: 1; transform: translateY(0); }
}

/* RTL Support */
[dir="rtl"] .hr-transcript-box,
body[data-lang="ar"] .hr-transcript-box {
  border-left: none;
  border-right: 3px solid #8b5cf6;
}

[dir="rtl"] .hr-statement-trans,
body[data-lang="ar"] .hr-statement-trans {
  border-left: none;
  border-right: 3px solid var(--hr-accent-primary);
}

@media (max-width: 768px), (pointer: coarse) {
  .hr-nav-link,
  .hr-test-btn,
  .hr-part-btn {
    min-height: 44px;
    min-width: 44px;
  }
}