/* ==========================================================================
   Swara FM Premium Theme System & Layout Styles
   ========================================================================== */

/* Typography & Core Tokens */
:root {
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* Smooth Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Glassmorphism Constants */
  --glass-blur: 16px;

  /* HSL Tailored Dark Palette (Default) */
  --bg-app: hsl(224, 71%, 4%);
  --bg-gradient: linear-gradient(135deg, hsl(224, 71%, 4%) 0%, hsl(244, 62%, 8%) 100%);
  --panel-bg: rgba(13, 20, 38, 0.45);
  --panel-border: rgba(255, 255, 255, 0.07);
  --panel-border-hover: rgba(255, 255, 255, 0.15);
  --panel-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  
  --text-primary: hsl(210, 40%, 98%);
  --text-secondary: hsl(215, 20%, 65%);
  --text-muted: hsl(215, 15%, 45%);
  
  --accent: hsl(250, 100%, 65%);
  --accent-glow: rgba(111, 66, 253, 0.4);
  
  --card-bg-hover: rgba(255, 255, 255, 0.03);
  --input-bg: rgba(255, 255, 255, 0.04);
  --input-border: rgba(255, 255, 255, 0.08);

  --badge-bg: rgba(255, 255, 255, 0.08);
  --badge-text: hsl(210, 40%, 90%);

  --glow-color-1: rgba(111, 66, 253, 0.18);
  --glow-color-2: rgba(0, 242, 254, 0.15);
}

/* Light Theme Variables */
body.light-theme {
  --bg-app: hsl(220, 30%, 96%);
  --bg-gradient: linear-gradient(135deg, hsl(220, 30%, 96%) 0%, hsl(210, 40%, 90%) 100%);
  --panel-bg: rgba(255, 255, 255, 0.65);
  --panel-border: rgba(0, 0, 0, 0.06);
  --panel-border-hover: rgba(0, 0, 0, 0.12);
  --panel-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
  
  --text-primary: hsl(224, 56%, 12%);
  --text-secondary: hsl(220, 15%, 40%);
  --text-muted: hsl(220, 10%, 60%);
  
  --accent: hsl(250, 85%, 55%);
  --accent-glow: rgba(79, 70, 229, 0.2);
  
  --card-bg-hover: rgba(0, 0, 0, 0.02);
  --input-bg: rgba(0, 0, 0, 0.03);
  --input-border: rgba(0, 0, 0, 0.08);

  --badge-bg: rgba(0, 0, 0, 0.05);
  --badge-text: hsl(220, 20%, 30%);

  --glow-color-1: rgba(111, 66, 253, 0.08);
  --glow-color-2: rgba(0, 242, 254, 0.06);
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-app);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  transition: background var(--transition-slow), color var(--transition-slow);
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

/* Ambient glow graphics in background */
.ambient-glow {
  position: absolute;
  width: 50vw;
  height: 50vw;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(140px);
  opacity: 0.8;
  transition: all var(--transition-slow);
}

.bg-glow-1 {
  top: -10vw;
  left: -10vw;
  background: var(--glow-color-1);
}

.bg-glow-2 {
  bottom: -10vw;
  right: -10vw;
  background: var(--glow-color-2);
}

/* Utilities */
.font-outfit {
  font-family: var(--font-display);
}

.hidden {
  display: none !important;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--panel-border);
  transition: all var(--transition-fast);
  text-transform: uppercase;
}

.badge-lang {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

/* App Container Layout */
.app-container {
  width: 100%;
  max-width: 1200px;
  padding: 2rem 1.5rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

/* Glassmorphism Panel base */
.glass-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--panel-shadow);
  transition: border var(--transition-normal), background var(--transition-normal), box-shadow var(--transition-normal);
}

/* Header Styles */
.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  border-radius: 20px;
  background: var(--panel-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--panel-border);
  box-shadow: var(--panel-shadow);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.logo-icon {
  width: 24px;
  height: 24px;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.9; }
}

.logo-text h1 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.1;
}

.logo-text p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

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

/* Language Selector */
.lang-selector {
  display: flex;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  padding: 4px;
  border-radius: 99px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 99px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  color: var(--text-primary);
}

.lang-btn.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--panel-border-hover);
  transform: scale(1.05);
}

.theme-icon {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

body.dark-theme .sun-icon {
  transform: scale(0) rotate(90deg);
  opacity: 0;
}

body.dark-theme .moon-icon {
  transform: scale(1) rotate(0deg);
  opacity: 1;
}

body:not(.dark-theme) .sun-icon {
  transform: scale(1) rotate(0deg);
  opacity: 1;
}

body:not(.dark-theme) .moon-icon {
  transform: scale(0) rotate(-90deg);
  opacity: 0;
}

/* ==========================================================================
   Player Dashboard
   ========================================================================== */
.player-dashboard {
  display: flex;
  width: 100%;
}

.player-card {
  display: grid;
  grid-template-columns: 350px 1fr;
  width: 100%;
  padding: 2.5rem;
  gap: 2.5rem;
  overflow: hidden;
}

@media (max-width: 900px) {
  .player-card {
    grid-template-columns: 1fr;
  }
  .player-visual-panel {
    justify-content: center;
    padding-bottom: 1.5rem;
  }
}

/* Left side: Vinyl Panel */
.player-visual-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.vinyl-container {
  position: relative;
  width: 280px;
  height: 280px;
}

.vinyl-disc {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, #333 4%, #0c0c0c 30%, #222 35%, #050505 50%, #222 55%, #111 68%, #000 70%);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6), inset 0 0 10px rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform var(--transition-slow);
}

/* Grooves overlay on vinyl */
.vinyl-disc::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  bottom: 10px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.03);
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}

/* Rotating state */
.vinyl-disc.playing {
  animation: spin 3.5s linear infinite;
}

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

.vinyl-center {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--accent); /* Overwritten dynamically */
  border: 4px solid #111;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  transition: background var(--transition-slow);
}

#vinyl-station-freq {
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.5px;
}

/* Tone Arm */
.tone-arm-wrapper {
  position: absolute;
  top: -15px;
  right: -5px;
  width: 90px;
  height: 130px;
  pointer-events: none;
  z-index: 2;
}

.tone-arm {
  width: 100%;
  height: 100%;
  color: #fff;
  transition: transform var(--transition-slow);
  transform-origin: 70px 10px;
  transform: rotate(-18deg); /* Rest position */
}

.tone-arm.active {
  transform: rotate(6deg); /* Playing position */
}

/* Right Side: Player Controls and Visualizer */
.player-controls-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
}

.station-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 4px 12px;
  background: var(--badge-bg);
  border: 1px solid var(--panel-border);
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #cbd5e1; /* Default grey dot */
}

/* Active status colors */
.status-badge.playing .status-dot {
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: beat 1s infinite alternate;
}

.status-badge.buffering .status-dot {
  background: #f59e0b;
  box-shadow: 0 0 8px #f59e0b;
  animation: flash 0.6s infinite alternate;
}

.status-badge.error .status-dot {
  background: #ef4444;
  box-shadow: 0 0 8px #ef4444;
}

@keyframes beat {
  100% { transform: scale(1.3); }
}

@keyframes flash {
  100% { opacity: 0.2; }
}

#current-station-name {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.1;
  background: linear-gradient(to right, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.station-sub-meta {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

/* Audio Visualizer */
.visualizer-container {
  width: 100%;
  height: 140px;
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
}

#canvas-visualizer {
  width: 100%;
  height: 100%;
  display: block;
}

.visualizer-modes {
  position: absolute;
  bottom: 8px;
  right: 8px;
  display: flex;
  gap: 4px;
  background: rgba(0,0,0,0.5);
  padding: 3px;
  border-radius: 8px;
  backdrop-filter: blur(8px);
}

.vis-mode-btn {
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.6);
  padding: 4px 8px;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.vis-mode-btn:hover {
  color: white;
}

.vis-mode-btn.active {
  background: var(--accent);
  color: white;
}

/* Play & Volume controls row */
.controls-row {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 0.5rem;
}

.play-btn-large {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 20px var(--accent-glow);
  transition: all var(--transition-fast);
}

.play-btn-large:hover {
  transform: scale(1.06);
  box-shadow: 0 8px 25px var(--accent-glow);
}

.play-btn-large:active {
  transform: scale(0.96);
}

.play-btn-large svg {
  width: 32px;
  height: 32px;
}

.volume-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  background: var(--input-bg);
  padding: 10px 1.25rem;
  border-radius: 99px;
  border: 1px solid var(--input-border);
}

.mute-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.mute-btn:hover {
  color: var(--text-primary);
}

.mute-btn svg {
  width: 20px;
  height: 20px;
}

.volume-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--input-border);
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-value {
  background: var(--accent);
}

.volume-slider::-webkit-slider-runnable-track {
  background: transparent;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-primary);
  border: 2px solid var(--accent);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

#volume-value {
  font-size: 0.85rem;
  font-weight: 700;
  min-width: 36px;
  text-align: right;
  color: var(--text-secondary);
}

/* ==========================================================================
   Filter Bar & Channel Grid
   ========================================================================== */
.stations-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  gap: 2rem;
}

@media (max-width: 768px) {
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
  }
}

.search-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  padding: 10px 1.25rem;
  border-radius: 99px;
  flex: 1;
  max-width: 400px;
  transition: border-color var(--transition-fast);
}

.search-box:focus-within {
  border-color: var(--accent);
}

.search-icon {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  width: 100%;
  outline: none;
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.filter-pills {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.filter-pill {
  background: var(--badge-bg);
  border: 1px solid var(--panel-border);
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.filter-pill:hover {
  color: var(--text-primary);
  border-color: var(--panel-border-hover);
}

.filter-pill.active {
  background: var(--accent);
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* Channels Grid */
.channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
  min-height: 200px;
  position: relative;
}

.channel-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), border var(--transition-normal), box-shadow var(--transition-normal);
}

.channel-card:hover {
  transform: translateY(-6px);
  border-color: var(--panel-border-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  background: var(--card-bg-hover);
}

/* Playing Glow state */
.channel-card.active {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.channel-logo-wrapper {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  position: relative;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.channel-logo-glow {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: inherit;
  filter: blur(8px);
  opacity: 0.6;
  z-index: -1;
  transition: transform var(--transition-normal);
}

.channel-card:hover .channel-logo-glow {
  transform: scale(1.15);
}

.channel-logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: white;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* Play state overlap overlay */
.card-play-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 2;
}

.channel-card:hover .card-play-overlay {
  opacity: 1;
}

/* If active, play overlay behaves slightly differently */
.channel-card.active .card-play-overlay {
  background: rgba(13, 20, 38, 0.6);
}

.overlay-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--accent-glow);
  transform: scale(0.8);
  transition: transform var(--transition-normal);
}

.channel-card:hover .overlay-btn {
  transform: scale(1);
}

.overlay-btn svg {
  width: 24px;
  height: 24px;
}

.channel-info h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
  line-height: 1.2;
}

.channel-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.channel-badges {
  display: flex;
  gap: 4px;
}

/* Loading & Empty states */
.loading-spinner-wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--panel-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spinner 0.8s linear infinite;
}

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

.no-results-msg {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Footer */
.app-footer {
  padding: 1.25rem 2rem;
  text-align: center;
  border-radius: 20px;
}

.app-footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}