/* ==========================================================================
   Design System & Variable Declarations
   ========================================================================== */
:root {
  --font-brand: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Color Palette */
  --bg-app: radial-gradient(circle at top left, #12213e, #070e1b);
  --color-gold: #C9A84C;
  --color-gold-hover: #e5C158;
  --color-gold-glow: rgba(201, 168, 76, 0.25);
  
  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-muted: rgba(255, 255, 255, 0.45);
  
  /* Status Colors */
  --color-online: #10b981;
  --color-live: #3b82f6;
  --color-live-bg: rgba(59, 130, 246, 0.15);
  --color-error: #f43f5e;
  --color-error-bg: rgba(244, 63, 94, 0.1);
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  
  /* Glassmorphism Styles */
  --glass-bg: rgba(27, 58, 107, 0.18);
  --glass-bg-hover: rgba(27, 58, 107, 0.28);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-active: rgba(201, 168, 76, 0.4);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--bg-app);
  color: var(--color-text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.02);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gold);
}

/* ==========================================================================
   App Layout
   ========================================================================== */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1500px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  margin-bottom: 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--glass-shadow);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.logo-container {
  position: relative;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  padding: 2px;
}

.logo-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-cover: cover;
  z-index: 2;
  position: relative;
}

.logo-ring {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 50%;
  border: 2px solid var(--color-gold);
  animation: logoPulse 2s infinite ease-in-out;
  z-index: 1;
}

.brand-info h1 {
  font-family: var(--font-brand);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #fff 40%, var(--color-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.server-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.4rem 0.8rem;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online {
  background: var(--color-online);
  box-shadow: 0 0 8px var(--color-online);
}

/* Main Grid Layout */
.app-main {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 1.5rem;
  flex: 1;
}

/* ==========================================================================
   Reusable UI Component Components
   ========================================================================== */
.card-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: var(--glass-shadow);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border var(--transition-fast), box-shadow var(--transition-fast);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  gap: 1rem;
}

.title-with-icon {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.title-with-icon h2 {
  font-family: var(--font-brand);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.text-gold {
  color: var(--color-gold);
}

/* Badges */
.badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 8px;
}

.badge-gold {
  background: rgba(201, 168, 76, 0.15);
  color: var(--color-gold);
  border: 1px solid rgba(201, 168, 76, 0.3);
}

.badge-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-secondary);
  border: 1px solid var(--glass-border);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-icon {
  padding: 0.5rem 0.85rem;
}

.btn-primary {
  background: var(--color-gold);
  color: #0b1329;
}

.btn-primary:hover {
  background: var(--color-gold-hover);
  box-shadow: 0 0 15px var(--color-gold-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-primary);
  border-color: var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary-subtle {
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-text-secondary);
}

.btn-secondary-subtle:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
}

.btn-danger-subtle {
  background: rgba(244, 63, 94, 0.08);
  color: var(--color-error);
}

.btn-danger-subtle:hover {
  background: rgba(244, 63, 94, 0.18);
  transform: scale(1.05);
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.btn-close:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.08);
}

/* Search Box */
.search-box {
  position: relative;
  width: 250px;
}

.search-box i {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 0.45rem 1rem 0.45rem 2.2rem;
  color: var(--color-text-primary);
  font-size: 0.85rem;
  font-family: var(--font-body);
  transition: all var(--transition-fast);
}

.search-box input:focus {
  outline: none;
  border-color: var(--color-gold);
  background: rgba(0, 0, 0, 0.3);
  box-shadow: 0 0 10px rgba(201, 168, 76, 0.15);
}

/* ==========================================================================
   Left Column: Schedule Section
   ========================================================================== */
.schedule-section {
  min-height: 550px;
}

/* Weekly Tabs */
.weekly-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  overflow-x: auto;
}

.weekly-tabs::-webkit-scrollbar {
  height: 3px;
}

.tab-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.6rem 0.85rem;
  min-width: 65px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.tab-btn .day-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.tab-btn .day-date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
}

.tab-btn.active {
  background: rgba(201, 168, 76, 0.12);
  border-color: var(--color-gold);
  box-shadow: 0 0 12px rgba(201, 168, 76, 0.1);
}

.tab-btn.active .day-name {
  color: var(--color-gold);
}

.tab-btn.active .day-date {
  color: var(--color-gold);
  opacity: 0.8;
}

.tab-btn.is-today {
  position: relative;
}

.tab-btn.is-today::after {
  content: '';
  position: absolute;
  top: 4px;
  right: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-live);
  box-shadow: 0 0 6px var(--color-live);
}

.tabs-loading {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding: 1rem;
}

/* Course List Container */
.course-list-container {
  flex: 1;
  overflow-y: auto;
  position: relative;
  min-height: 350px;
  max-height: 600px;
  padding-right: 0.25rem;
}

/* Course Cards list */
.course-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.course-card {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: center;
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 1rem 1.25rem;
  gap: 1rem;
  transition: all var(--transition-normal);
}

.course-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateX(4px);
}

.course-card.broadcasting {
  background: rgba(59, 130, 246, 0.04);
  border-color: rgba(59, 130, 246, 0.25);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.06);
}

.course-card.broadcasting:hover {
  background: rgba(59, 130, 246, 0.07);
  border-color: rgba(59, 130, 246, 0.4);
}

/* Course Time Column */
.course-time-block {
  display: flex;
  flex-direction: column;
}

.course-time {
  font-family: var(--font-brand);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.course-duration {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

/* Course Info Column */
.course-info {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-w: 0; /* allows text truncation */
}

.course-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.course-tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  text-transform: uppercase;
}

.course-tag.main-show {
  background: rgba(201, 168, 76, 0.15);
  color: var(--color-gold);
  border: 1px solid rgba(201, 168, 76, 0.2);
}

.course-tag.class-show {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-secondary);
  border: 1px solid var(--glass-border);
}

.theme-tag {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  background: rgba(0, 0, 0, 0.15);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.course-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

.course-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

/* Course Action Column */
.course-action {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

/* ==========================================================================
   Sidebar: Queue Card, Library, and Player
   ========================================================================== */
.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.queue-card, .library-card {
  min-height: 250px;
}

.queue-list-container, .library-list-container {
  overflow-y: auto;
  max-height: 280px;
  flex: 1;
  padding-right: 0.2rem;
}

/* Empty States & Loading States */
.list-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  gap: 0.75rem;
}

.list-state p {
  font-size: 0.85rem;
}

.empty-icon {
  width: 36px;
  height: 36px;
  stroke-width: 1.5px;
  opacity: 0.4;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid rgba(255, 255, 255, 0.05);
  border-top-color: var(--color-gold);
  border-radius: 50%;
  animation: spin 1s infinite linear;
}

/* Queue List */
.queue-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.queue-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.queue-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.queue-item-info {
  min-width: 0;
}

.queue-item-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.queue-item-time {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

/* Queue Progress */
.queue-progress-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.progress-track {
  flex: 1;
  height: 4px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-gold);
  width: 0%;
  transition: width 0.3s ease;
}

.queue-item.downloading .progress-fill {
  background: var(--color-live);
  box-shadow: 0 0 6px var(--color-live);
}

.progress-pct {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  min-width: 28px;
  text-align: right;
}

/* Status Indicator */
.status-pill {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.status-pill.scheduled {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-secondary);
}

.status-pill.downloading {
  background: var(--color-live-bg);
  color: var(--color-live);
  animation: pulseBg 1.5s infinite alternate;
}

.status-pill.failed {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.queue-error-msg {
  font-size: 0.7rem;
  color: var(--color-error);
  word-break: break-all;
}

/* Library List */
.library-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.library-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 0.6rem 0.85rem;
  gap: 0.75rem;
  transition: all var(--transition-fast);
}

.library-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}

.library-item.playing {
  border-color: var(--color-gold);
  background: rgba(201, 168, 76, 0.05);
}

.library-item-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  flex: 1;
  cursor: pointer;
}

.btn-play-status {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.library-item:hover .btn-play-status {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: #0b1329;
}

.library-item.playing .btn-play-status {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: #0b1329;
}

.library-item-text {
  min-width: 0;
}

.library-item-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.library-item-meta {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.library-item-right {
  display: flex;
  align-items: center;
}

/* ==========================================================================
   Audio Player Card
   ========================================================================== */
.player-card {
  border: 1px solid var(--glass-border-active);
  box-shadow: 0 10px 40px rgba(201, 168, 76, 0.15);
  animation: slideUp 0.3s ease-out;
}

.player-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: 0.75rem;
  margin-bottom: 0.85rem;
}

.playing-title-container {
  min-width: 0;
  flex: 1;
}

.playing-title-container h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.playing-title-container p {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 0.1rem;
}

.player-progress-area {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.progress-bar-wrapper {
  position: relative;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  cursor: pointer;
}

.progress-bar-wrapper input[type="range"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 10;
}

.progress-filled {
  height: 100%;
  background: var(--color-gold);
  border-radius: 3px;
  width: 0%;
  pointer-events: none;
}

.time-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

.player-bottom-controls {
  display: grid;
  grid-template-columns: 80px 1fr 100px;
  align-items: center;
  gap: 0.5rem;
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  color: var(--color-text-secondary);
}

.speed-control select {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  color: var(--color-text-primary);
  font-size: 0.7rem;
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  outline: none;
  cursor: pointer;
}

.core-buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.6rem;
}

.core-buttons .btn-primary {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  padding: 0;
}

.core-buttons .btn-secondary-subtle {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  padding: 0;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  justify-content: flex-end;
}

.volume-control .btn {
  padding: 0.2rem;
}

.volume-control input[type="range"] {
  width: 60px;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold);
}

/* ==========================================================================
   Utilities & Footer
   ========================================================================== */
.hidden {
  display: none !important;
}

.app-footer-bar {
  text-align: center;
  padding: 2rem 1rem 1rem 1rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes logoPulse {
  0% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.9; }
  100% { transform: scale(1); opacity: 0.5; }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes pulseBg {
  0% { background: rgba(59, 130, 246, 0.1); }
  100% { background: rgba(59, 130, 246, 0.25); }
}

@keyframes slideUp {
  0% { transform: translateY(20px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1150px) {
  .app-main {
    grid-template-columns: 1fr;
  }
  
  .sidebar-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  
  .player-card {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .header-right {
    width: 100%;
    justify-content: space-between;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  .search-box {
    width: 100%;
  }
  
  .course-card {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  
  .course-action {
    justify-content: flex-start;
  }
  
  .sidebar-section {
    grid-template-columns: 1fr;
  }
  
  .player-card {
    grid-column: span 1;
  }
}

/* ==========================================================================
   Header & Action Bar Enhancements
   ========================================================================== */
.schedule-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-sm {
  font-size: 0.75rem;
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
}

.status-dot.offline {
  background-color: var(--color-error);
  box-shadow: 0 0 8px rgba(244, 63, 94, 0.5);
}

.status-dot.connected {
  background-color: var(--color-online);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

/* Course Action Button Group */
.course-action-buttons {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.badge-drive {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.badge-local {
  background: rgba(59, 130, 246, 0.15);
  color: #3b82f6;
  border: 1px solid rgba(59, 130, 246, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* ==========================================================================
   Modals (Glassmorphism Dialogs)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 9, 20, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5rem;
  transition: opacity var(--transition-normal);
}

.modal-dialog {
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  border-radius: 20px;
  padding: 1.75rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  flex-direction: column;
}

.modal-dialog-lg {
  max-width: 840px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--glass-border);
}

.modal-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.modal-title h3 {
  font-family: var(--font-brand);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.modal-body {
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.modal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.25rem;
  border-top: 1px solid var(--glass-border);
  gap: 1rem;
}

.modal-footer-actions {
  display: flex;
  gap: 0.6rem;
}

.modal-footer-info {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Google Drive Settings Components
   ========================================================================== */
.gdrive-intro-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  padding: 1rem 1.25rem;
  border-radius: 12px;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.gdrive-status-card {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  padding: 1.25rem;
  border-radius: 14px;
}

.gdrive-status-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.status-label {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.gdrive-account-info {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--glass-border);
  font-size: 0.85rem;
}

.gdrive-folder-name {
  color: var(--color-gold);
  margin-top: 0.4rem;
  font-weight: 500;
}

.gdrive-folder-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: #3b82f6;
  text-decoration: none;
  margin-top: 0.5rem;
  font-weight: 500;
}

.gdrive-folder-link:hover {
  text-decoration: underline;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.form-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.85rem;
  outline: none;
  transition: border var(--transition-fast);
}

.form-input:focus {
  border-color: var(--color-gold);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.hint-link {
  color: var(--color-gold);
  text-decoration: underline;
  cursor: pointer;
  margin-left: 0.4rem;
}

.gdrive-help-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 1rem;
  font-size: 0.8rem;
  line-height: 1.6;
}

.gdrive-help-box h4 {
  color: var(--color-gold);
  margin-bottom: 0.5rem;
}

.gdrive-help-box ol {
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.gdrive-help-box a {
  color: #60a5fa;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0.25rem;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  cursor: pointer;
}

/* ==========================================================================
   Export URLs Modal Components
   ========================================================================== */
.export-intro {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.export-tabs-nav {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 0.6rem;
}

.export-tab-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-text-secondary);
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.export-tab-btn.active {
  background: rgba(201, 168, 76, 0.15);
  border-color: rgba(201, 168, 76, 0.35);
  color: var(--color-gold);
}

.export-textarea-wrapper {
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.4);
}

.export-textarea {
  width: 100%;
  height: 320px;
  background: transparent;
  border: none;
  padding: 1rem;
  color: #34d399;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.8rem;
  line-height: 1.6;
  resize: none;
  outline: none;
  white-space: pre;
  overflow-wrap: normal;
  overflow-x: auto;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 2000;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: rgba(14, 27, 49, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: toastSlideIn 0.3s ease;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.toast-success {
  border-color: rgba(16, 185, 129, 0.4);
  color: #10b981;
}

.toast-error {
  border-color: rgba(244, 63, 94, 0.4);
  color: #f43f5e;
}

.toast-info {
  border-color: rgba(201, 168, 76, 0.4);
  color: var(--color-gold);
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Main View Switcher Tabs (Schedule vs. All 1,273 Episodes)
   ========================================================================== */
.main-view-switcher {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  background: var(--glass-bg);
  padding: 0.4rem;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  width: fit-content;
}

.view-switch-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1.25rem;
  background: transparent;
  border: none;
  border-radius: 12px;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.view-switch-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.view-switch-btn.active {
  background: var(--color-gold);
  color: #0b1329;
  box-shadow: 0 4px 15px var(--color-gold-glow);
}

.view-switch-btn.active .badge-gold {
  background: rgba(11, 19, 41, 0.2);
  color: #0b1329;
  border-color: rgba(11, 19, 41, 0.3);
}

/* Week Navigator Group */
.week-nav-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(0, 0, 0, 0.25);
  padding: 0.25rem 0.4rem;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
}

.date-picker-input {
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  padding: 0.2rem 0.4rem;
  outline: none;
  cursor: pointer;
  color-scheme: dark;
}

.date-picker-input:hover {
  border-color: var(--color-gold);
}

.section-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* ==========================================================================
   All 1,273 Episodes Library View
   ========================================================================== */
.all-episodes-toolbar {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.search-box-wide {
  width: 100%;
}

.theme-filter-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.theme-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  padding: 0.4rem 0.85rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-pill:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.theme-pill.active {
  background: rgba(201, 168, 76, 0.2);
  border-color: var(--color-gold);
  color: var(--color-gold);
  font-weight: 600;
}

.all-episodes-grid {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.episode-library-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 1rem 1.25rem;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.episode-library-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(201, 168, 76, 0.3);
  transform: translateY(-1px);
}

.episode-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.episode-main-info {
  flex: 1;
}

.episode-main-info h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.4;
  margin-bottom: 0.3rem;
}

.episode-subtitle-text {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.card-header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* ==========================================================================
   Favorite Bookmark Star Buttons & Badges
   ========================================================================== */
.btn-favorite {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-favorite:hover {
  background: rgba(201, 168, 76, 0.15);
  border-color: var(--color-gold);
  color: var(--color-gold);
  transform: scale(1.08);
}

.btn-favorite.is-active {
  background: rgba(201, 168, 76, 0.22);
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.btn-favorite.is-active svg {
  fill: var(--color-gold);
  stroke: var(--color-gold);
  filter: drop-shadow(0 0 6px rgba(201, 168, 76, 0.65));
}

.theme-pill.pill-favorites {
  border-color: rgba(201, 168, 76, 0.35);
  color: var(--color-gold);
}

.theme-pill.pill-favorites:hover {
  border-color: var(--color-gold);
  background: rgba(201, 168, 76, 0.15);
}

.theme-pill.pill-favorites.active {
  background: var(--color-gold);
  color: #070e1b;
  font-weight: 700;
}

.theme-pill.pill-favorites.active svg {
  stroke: #070e1b;
  fill: #070e1b;
}

/* ==========================================================================
   Dynamic Stats Indicator Pills (全庫目前 / 本月新增 / 今年新增)
   ========================================================================== */
.library-stats-pills {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(201, 168, 76, 0.08);
  border: 1px solid rgba(201, 168, 76, 0.25);
  padding: 0.32rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
}

.stat-pill svg {
  width: 14px;
  height: 14px;
  color: var(--color-gold);
}

.stat-pill strong {
  color: #fff;
  font-weight: 700;
  text-shadow: 0 0 10px rgba(201, 168, 76, 0.5);
}

/* ==========================================================================
   Expandable Course & Episode Summary / Syllabus
   ========================================================================== */
.episode-library-card, .course-card {
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
}

.episode-library-card:hover, .course-card:hover {
  border-color: rgba(201, 168, 76, 0.35);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}

.episode-library-card.is-expanded, .course-card.is-expanded {
  border-color: var(--color-gold);
  background: rgba(27, 58, 107, 0.25);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.course-card-main-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  gap: 1rem;
}

.course-action-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.episode-summary-box, .course-summary-box {
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  margin-top: 0.4rem;
  transition: all var(--transition-fast);
}

.episode-summary-box .summary-preview, .course-summary-box .summary-preview {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

.summary-text {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.is-expanded .summary-text {
  display: block;
  -webkit-line-clamp: unset;
  overflow: visible;
  color: #fff;
}

.expand-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.4rem;
  padding-top: 0.4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.74rem;
  color: var(--color-gold);
  opacity: 0.85;
}

.expand-indicator:hover {
  opacity: 1;
}

.expand-chevron {
  width: 14px;
  height: 14px;
  transition: transform 0.25s ease;
}

.is-expanded .expand-chevron {
  transform: rotate(180deg);
}

.episode-expanded-details, .course-expanded-details {
  display: none;
  margin-top: 0.65rem;
  padding-top: 0.65rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  animation: fadeIn 0.25s ease;
}

.is-expanded .episode-expanded-details, .is-expanded .course-expanded-details {
  display: block;
}

.expanded-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.5rem;
  font-size: 0.75rem;
}

.meta-item {
  display: flex;
  gap: 0.35rem;
  background: rgba(255, 255, 255, 0.03);
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.meta-label {
  color: var(--color-text-muted);
}

.meta-val {
  color: var(--color-text-primary);
  font-weight: 500;
}

.font-mono {
  font-family: monospace;
  font-size: 0.72rem;
}

.load-more-area {
  display: flex;
  justify-content: center;
  margin-top: 1.5rem;
  padding-bottom: 1rem;
}

/* ==========================================================================
   Responsive Design for Handheld Devices (iPad & Mobile Phone) & PWA
   ========================================================================== */
@media (max-width: 1024px) {
  .app-container {
    padding: 1rem;
  }

  .app-main {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .main-view-switcher {
    width: 100%;
  }

  .view-switch-btn {
    flex: 1;
    justify-content: center;
    padding: 0.75rem 0.5rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 768px) {
  .app-container {
    padding: 0.6rem;
    padding-bottom: 125px; /* Leave space so bottom-fixed player doesn't cover content */
  }

  .app-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
    padding: 0.85rem 1rem;
    border-radius: 16px;
  }

  .header-left {
    gap: 0.75rem;
  }

  .brand-info h1 {
    font-size: 1.25rem;
  }

  .brand-subtitle {
    font-size: 0.75rem;
  }

  .header-right {
    display: flex;
    justify-content: space-between;
    width: 100%;
    gap: 0.5rem;
  }

  .header-right .btn span {
    display: none; /* Hide label text on mobile, keep clean icons */
  }

  .header-right .btn {
    padding: 0.55rem 0.85rem;
    flex: 1;
    justify-content: center;
  }

  .section-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
  }

  .schedule-header-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
  }

  .week-nav-group {
    justify-content: space-between;
    width: 100%;
  }

  .search-box {
    width: 100%;
  }

  .library-stats-pills {
    width: 100%;
  }

  .stat-pill {
    flex: 1;
    min-width: 95px;
    justify-content: center;
    font-size: 0.72rem;
    padding: 0.28rem 0.5rem;
  }

  /* Schedule course card mobile stack */
  .course-card-main-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .course-action-group {
    width: 100%;
    justify-content: space-between;
  }

  .course-action {
    flex: 1;
  }

  .course-action-buttons {
    flex-wrap: wrap;
    width: 100%;
  }

  .course-action-buttons .btn {
    flex: 1;
    min-width: 110px;
    justify-content: center;
    min-height: 42px;
  }

  /* Episode library card mobile stack */
  .episode-card-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .card-header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .card-header-actions .course-action-buttons {
    flex: 1;
  }

  .card-header-actions .course-action-buttons .btn {
    flex: 1;
    min-width: 95px;
    justify-content: center;
    min-height: 42px;
  }

  /* Sticky Bottom Player on Handheld & Mobile Phone */
  .player-card {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-radius: 20px 20px 0 0;
    margin: 0;
    padding: 0.85rem 1rem;
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
    background: rgba(14, 26, 56, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: none;
    border-top: 1px solid var(--color-gold);
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.65);
  }

  .player-bottom-controls {
    gap: 0.5rem;
  }

  .volume-control {
    display: none; /* Mobile utilizes device hardware volume buttons */
  }
}