/**
 * Chada (chada.ma) - Design System & Master Stylesheet
 * Integrated Radio FM (100.8 FM) & Live TV Stream
 * 
 * Color Scheme:
 * - Primary Red:   #D3000F (Chada Brand Red)
 * - Accent Red:    #FF1B2B (Luminous Hover Red)
 * - Active Red:    #A8000C (Pressed State Red)
 * - Primary Black: #000000 (Pure Deep Black)
 * - Stage Base:    #08080A (Dark Atmosphere)
 * - Card Surface:  rgba(20, 20, 24, 0.90) (Frosted Elevation)
 * - Neutral White: #FFFFFF (High-contrast typography)
 * - Muted Silver:  #A0A0AB (Secondary content)
 */

:root {
  --color-primary: #D3000F;
  --color-primary-hover: #FF1B2B;
  --color-primary-active: #A8000C;
  --color-primary-glow: rgba(211, 0, 15, 0.45);
  --color-primary-subtle: rgba(211, 0, 15, 0.12);
  
  --color-black: #000000;
  --color-bg: #08080A;
  --color-card: rgba(20, 20, 24, 0.90);
  --color-card-border: rgba(255, 255, 255, 0.09);
  
  --color-text-main: #FFFFFF;
  --color-text-muted: #A0A0AB;
  --color-text-subtle: #686874;
  
  --color-live: #00E676;
  --color-error: #FF334B;

  --font-primary: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-arabic: 'Tajawal', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.55s cubic-bezier(0.16, 1, 0.3, 1);

  --vol-percent: 80%;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-size: 16px;
  height: 100%;
}

body {
  min-height: 100%;
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  position: relative;
  padding: 1.5rem 1rem;
}

/* Screen reader utility for accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Accessible focus visible outlines */
:focus-visible {
  outline: 3px solid #FFFFFF;
  outline-offset: 4px;
}

/* ==========================================================================
   Immersive Ambient Lighting Effects
   ========================================================================== */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(95px);
  will-change: transform, opacity;
  transform: translateZ(0);
}

.ambient-glow--top {
  width: 580px;
  height: 580px;
  top: -160px;
  background: radial-gradient(circle, rgba(211, 0, 15, 0.35) 0%, rgba(211, 0, 15, 0) 70%);
}

.ambient-glow--bottom {
  width: 640px;
  height: 640px;
  bottom: -200px;
  background: radial-gradient(circle, rgba(211, 0, 15, 0.18) 0%, rgba(211, 0, 15, 0) 70%);
}

/* ==========================================================================
   Page Container & Dynamic Stage Card
   ========================================================================== */
.page-wrapper {
  position: relative;
  z-index: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Fixed, wide card container across both Radio and TV modes (consistent width, zero layout shift) */
.player-card {
  width: 100%;
  max-width: 760px;
  background: var(--color-card);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid var(--color-card-border);
  border-radius: 28px;
  padding: 2.25rem 2.25rem 1.85rem;
  box-shadow: 
    0 24px 60px -12px rgba(0, 0, 0, 0.8),
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 0 45px -10px var(--color-primary-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: 
    transform var(--transition-normal), 
    box-shadow var(--transition-normal);
}

/* ==========================================================================
   Brand Header & Visual Identity
   ========================================================================== */
.brand-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  text-align: center;
}

.logo-wrapper {
  position: relative;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 1.15rem;
}

.logo-wrapper::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 26px;
  background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
  opacity: 0.4;
  z-index: -1;
  transition: opacity var(--transition-normal);
}

.player-card.is-playing .logo-wrapper::after,
.player-card.is-tv-mode .logo-wrapper::after {
  opacity: 0.8;
}

.brand-logo {
  width: 130px;
  height: 130px;
  object-fit: contain;
  border-radius: 22px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.6);
  transition: transform var(--transition-normal);
  transform: translateZ(0);
}

.brand-logo:hover {
  transform: translateY(-2px) scale(1.02);
}

.station-identity {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1.35rem;
}

.station-title {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--color-text-main);
  text-transform: uppercase;
  transition: color var(--transition-normal);
}

.station-badge-group {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-text-main);
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* Pulsing dot when stream is actively live */
.player-card.is-playing .live-dot,
.player-card.is-tv-mode .live-dot {
  background-color: var(--color-live);
  box-shadow: 0 0 10px var(--color-live);
  animation: pulse-dot 1.8s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.35);
    opacity: 0.6;
  }
}

.frequency-pill {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background-color: rgba(255, 255, 255, 0.04);
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: color var(--transition-fast);
}

/* ==========================================================================
   Media Toggle Switch (Live Radio vs Live TV)
   ========================================================================== */
.media-toggle-container {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 4px;
  border-radius: 9999px;
  gap: 4px;
  margin-bottom: 1.25rem;
}

.toggle-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.15rem;
  border-radius: 9999px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: 
    background-color var(--transition-normal), 
    color var(--transition-normal), 
    box-shadow var(--transition-normal),
    transform var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.toggle-btn:hover {
  color: var(--color-text-main);
  background-color: rgba(255, 255, 255, 0.06);
}

.toggle-btn:active {
  transform: scale(0.97);
}

/* Active Highlight using Primary Red #D3000F */
.toggle-btn.active {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 16px var(--color-primary-glow);
}

.toggle-btn.active:hover {
  background-color: var(--color-primary-hover);
}

.toggle-icon {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.badge-live-mini {
  font-size: 0.65rem;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
  padding: 1px 6px;
  border-radius: 6px;
  letter-spacing: 0.06em;
}

/* ==========================================================================
   Media Views & Transitions
   ========================================================================== */
.media-view {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0;
  transform: translateY(8px) translateZ(0);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.media-view.active {
  opacity: 1;
  transform: translateY(0) translateZ(0);
}

.media-view[hidden] {
  display: none;
}

/* ==========================================================================
   Radio View Components (Visualizer & Controls)
   ========================================================================== */
.visualizer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: 32px;
  margin: 0.25rem 0 0.75rem;
}

.wave-bar {
  width: 4px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 3px;
  transform: translateZ(0);
  transition: height var(--transition-fast), background-color var(--transition-fast);
}

.player-card.is-playing .wave-bar {
  animation: equalize 1.2s infinite ease-in-out alternate;
}

.player-card.is-playing .wave-bar:nth-child(1) { animation-duration: 0.85s; animation-delay: 0.0s; }
.player-card.is-playing .wave-bar:nth-child(2) { animation-duration: 1.15s; animation-delay: 0.2s; }
.player-card.is-playing .wave-bar:nth-child(3) { animation-duration: 0.95s; animation-delay: 0.4s; }
.player-card.is-playing .wave-bar:nth-child(4) { animation-duration: 1.30s; animation-delay: 0.1s; }
.player-card.is-playing .wave-bar:nth-child(5) { animation-duration: 0.80s; animation-delay: 0.3s; }

@keyframes equalize {
  0% {
    height: 6px;
    opacity: 0.6;
  }
  100% {
    height: 30px;
    opacity: 1;
  }
}

.controls-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  margin-top: 0.25rem;
}

/* Main Play / Pause Button */
.play-btn {
  position: relative;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: var(--color-text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 28px -4px var(--color-primary-glow), 0 4px 10px rgba(0, 0, 0, 0.4);
  transition: 
    transform var(--transition-fast), 
    background-color var(--transition-fast), 
    box-shadow var(--transition-fast);
  transform: translateZ(0);
  margin-bottom: 1.1rem;
}

.play-btn:hover {
  background-color: var(--color-primary-hover);
  transform: scale(1.06) translateZ(0);
  box-shadow: 0 14px 34px -2px rgba(255, 27, 43, 0.55), 0 6px 14px rgba(0, 0, 0, 0.5);
}

.play-btn:active {
  background-color: var(--color-primary-active);
  transform: scale(0.96) translateZ(0);
}

/* Icon Switching Inside Play Button */
.icon {
  width: 32px;
  height: 32px;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.icon-play {
  display: block;
  transform: translateX(2px);
}

.icon-pause {
  display: none;
}

.icon-spinner {
  display: none;
  animation: spin-loop 1s linear infinite;
}

.spinner-track {
  stroke: rgba(255, 255, 255, 0.25);
}

.spinner-head {
  stroke: #FFFFFF;
  stroke-dasharray: 80;
  stroke-dashoffset: 60;
  stroke-linecap: round;
}

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

/* Playing State */
.player-card.is-playing .icon-play {
  display: none;
}
.player-card.is-playing .icon-pause {
  display: block;
}

/* Buffering / Loading State */
.player-card.is-loading .icon-play,
.player-card.is-loading .icon-pause {
  display: none;
}
.player-card.is-loading .icon-spinner {
  display: block;
}

/* Status text message */
.status-message {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
  min-height: 1.4rem;
  margin-bottom: 1.25rem;
  transition: color var(--transition-normal);
}

.status-message.is-live {
  color: #FFFFFF;
  font-weight: 500;
}

.status-message.has-error {
  color: var(--color-error);
}

/* Volume Slider Controls */
.volume-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  max-width: 320px;
  background-color: rgba(255, 255, 255, 0.04);
  padding: 0.5rem 0.95rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.mute-btn {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
  border-radius: 50%;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.mute-btn:hover {
  color: var(--color-text-main);
  transform: scale(1.1);
}

.volume-icon {
  width: 20px;
  height: 20px;
}

.icon-vol-low,
.icon-vol-muted {
  display: none;
}

.volume-container.is-muted .icon-vol-high,
.volume-container.is-muted .icon-vol-low {
  display: none;
}
.volume-container.is-muted .icon-vol-muted {
  display: block;
  color: var(--color-primary);
}

.volume-container.is-low .icon-vol-high {
  display: none;
}
.volume-container.is-low .icon-vol-low {
  display: block;
}

.volume-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 5px;
  background: linear-gradient(
    to right,
    var(--color-primary) 0%,
    var(--color-primary) var(--vol-percent),
    rgba(255, 255, 255, 0.15) var(--vol-percent),
    rgba(255, 255, 255, 0.15) 100%
  );
  border-radius: 3px;
  outline: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-text-main);
  border: 2px solid var(--color-primary);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

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

.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-text-main);
  border: 2px solid var(--color-primary);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.volume-slider::-moz-range-track {
  height: 5px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

.volume-slider::-moz-range-progress {
  height: 5px;
  background: var(--color-primary);
  border-radius: 3px;
}

.volume-value {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-subtle);
  width: 32px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   TV View & Responsive 16:9 Container
   ========================================================================== */
.video-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 0.25rem;
}

/* Responsive 16:9 Aspect Ratio Container */
.responsive-video-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  overflow: hidden;
  background-color: var(--color-black);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 
    0 16px 36px rgba(0, 0, 0, 0.7),
    0 0 35px -10px var(--color-primary-subtle);
}

/* Graceful Fallback for browsers without native aspect-ratio */
@supports not (aspect-ratio: 16 / 9) {
  .responsive-video-wrapper {
    height: 0;
    padding-bottom: 56.25%; /* 9 / 16 * 100% = 56.25% */
  }
}

.responsive-video-wrapper video,
.responsive-video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background-color: #000000;
  object-fit: contain;
}

.video-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.75rem 0.5rem 0.25rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.video-meta-left {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.video-stream-pill {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-main);
  background: rgba(255, 255, 255, 0.06);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.video-stream-note {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

.video-quality-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(211, 0, 15, 0.12);
  border: 1px solid rgba(211, 0, 15, 0.3);
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  letter-spacing: 0.04em;
}

/* ==========================================================================
   Persistent Card Divider
   ========================================================================== */
.card-divider {
  width: 100%;
  border: none;
  height: 1px;
  background: linear-gradient(
    to right, 
    transparent, 
    rgba(255, 255, 255, 0.08), 
    transparent
  );
  margin: 1.75rem 0 1.25rem;
}

/* ==========================================================================
   Persistent Zero-CLS "Stay Tuned" Multilingual Carousel
   ========================================================================== */
.stay-tuned-section {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.stay-tuned-carousel {
  display: grid;
  place-items: center;
  min-height: 2.8rem;
  width: 100%;
  position: relative;
  overflow: hidden;
}

.stay-tuned-item {
  grid-area: 1 / 1 / 2 / 2;
  width: 100%;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) translateZ(0);
  transition: 
    opacity var(--transition-smooth), 
    transform var(--transition-smooth),
    visibility var(--transition-smooth);
  will-change: opacity, transform;
  pointer-events: none;
}

.stay-tuned-item.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) translateZ(0);
  pointer-events: auto;
}

.stay-tuned-item.exit {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-16px) translateZ(0);
}

.quote-text {
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  display: inline-block;
}

/* Specific Arabic Typography */
.stay-tuned-item.arabic .quote-text {
  font-family: var(--font-arabic);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0;
  direction: rtl;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  margin-top: 1.5rem;
  text-align: center;
}

.copyright {
  font-size: 0.78rem;
  color: var(--color-text-subtle);
}

.external-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.external-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 600px) {
  body {
    padding: 1rem 0.75rem;
  }

  .player-card {
    padding: 1.65rem 1.15rem 1.35rem;
    border-radius: 22px;
  }

  .brand-logo {
    width: 115px;
    height: 115px;
  }

  .station-title {
    font-size: 1.3rem;
  }

  .toggle-btn {
    padding: 0.45rem 0.95rem;
    font-size: 0.8rem;
  }

  .play-btn {
    width: 68px;
    height: 68px;
  }

  .icon {
    width: 28px;
    height: 28px;
  }

  .volume-container {
    max-width: 250px;
  }

  .quote-text {
    font-size: 1.02rem;
  }

  .stay-tuned-item.arabic .quote-text {
    font-size: 1.22rem;
  }
}

/* ==========================================================================
   Accessibility: Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .stay-tuned-item,
  .media-view {
    transform: none !important;
  }
}