/* ==========================================================================
   TUNES MUSIC PLAYER - COMPACT, HIGH-POLISH DESIGN SYSTEM (DESKTOP & MOBILE)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS & CSS VARIABLES
   -------------------------------------------------------------------------- */
:root {
  /* Color System */
  --bg-dark: #07090e;
  --bg-surface: #0f1420;
  --bg-surface-elevated: #161d2d;
  --bg-surface-hover: #1e273d;
  --bg-glass: rgba(15, 20, 32, 0.75);
  --bg-glass-card: rgba(22, 29, 45, 0.65);
  
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-medium: rgba(255, 255, 255, 0.14);
  --border-accent: rgba(0, 242, 254, 0.4);

  /* Accents & Gradients */
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --accent-gradient-hover: linear-gradient(135deg, #38f9d7 0%, #4facfe 100%);
  --accent-glow: rgba(0, 242, 254, 0.25);
  --accent-glow-strong: rgba(0, 242, 254, 0.45);

  /* Text & Contrast */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  
  /* Spacing Scale (8px Grid System) */
  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Elevation & Shadows */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-accent: 0 8px 25px rgba(0, 242, 254, 0.35);

  /* Border Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --------------------------------------------------------------------------
   2. GLOBAL RESETS & BASICS
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
}

body {
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 242, 254, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(79, 172, 254, 0.05) 0%, transparent 40%);
  font-family: var(--font-family);
  color: var(--text-primary);
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   3. MAIN APP LAYOUT (GRID SHELL)
   -------------------------------------------------------------------------- */
header {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
  grid-template-rows: 1fr 85px;
  grid-template-areas:
    "sidebar main"
    "player  player";
  overflow: hidden;
  background-color: var(--bg-dark);
}

/* --------------------------------------------------------------------------
   4. SIDEBAR (.menu_side)
   -------------------------------------------------------------------------- */
.sidebar_overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.sidebar_overlay.active {
  opacity: 1;
  pointer-events: auto;
}

header .menu_side {
  grid-area: sidebar;
  width: 100%;
  height: 100%;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  padding: var(--space-md) var(--space-sm);
  overflow: hidden;
  z-index: 10;
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
}

header .menu_side .brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  padding: 0 var(--space-xs);
}

header .menu_side .brand h1 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

header .menu_side .brand .brand-icon {
  font-size: 1.4rem;
  color: var(--accent-cyan);
  -webkit-text-fill-color: initial;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.close_sidebar_btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px;
}

header .menu_side .Music {
  margin-bottom: var(--space-xs);
  padding: 0 var(--space-xs);
}

header .menu_side .Music h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
  transition: var(--transition-fast);
  padding: var(--space-2xs) 0;
}

header .menu_side .Music h4:hover {
  color: var(--text-primary);
}

header .menu_side .Music .active {
  color: var(--accent-cyan);
}

header .menu_side .Music .active .bi {
  display: inline-block;
  font-size: 1rem;
  color: var(--accent-cyan);
}

header .menu_side .menu_song {
  flex: 1;
  overflow-y: auto;
  padding-right: var(--space-2xs);
  display: flex;
  flex-direction: column;
  gap: 6px;
  list-style: none;
}

header .menu_side .menu_song li.song_item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-normal);
}

header .menu_side .menu_song li.song_item:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-subtle);
}

header .menu_side .menu_song li.song_item span {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 18px;
  text-align: center;
}

header .menu_side .menu_song li.song_item img {
  width: 38px;
  height: 38px;
  min-width: 38px;
  border-radius: var(--radius-xs);
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

header .menu_side .menu_song li.song_item h5 {
  flex: 1;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
  padding-right: 28px;
}

header .menu_side .menu_song li.song_item h5 .subtitle {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}

header .menu_side .menu_song li.song_item .BluesPlay {
  position: absolute;
  right: 10px;
  font-size: 1.15rem;
  color: var(--text-muted);
  opacity: 0.6;
  transition: var(--transition-bounce);
}

header .menu_side .menu_song li.song_item:hover .BluesPlay {
  color: var(--accent-cyan);
  opacity: 1;
  transform: scale(1.1);
}

/* --------------------------------------------------------------------------
   5. MAIN CONTENT AREA (.song_side) & NAV TABS
   -------------------------------------------------------------------------- */
header .song_side {
  grid-area: main;
  width: 100%;
  height: 100%;
  background: var(--bg-dark);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  padding: 0 var(--space-lg) var(--space-lg) var(--space-lg);
  position: relative;
}

header .song_side nav {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  height: 70px;
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-md);
  padding: 0 var(--space-xs);
  gap: var(--space-sm);
}

.mobile_menu_btn {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
  padding: 4px;
}

header .song_side nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

header .song_side nav ul li.nav_tab {
  position: relative;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  padding: var(--space-xs) 0;
}

header .song_side nav ul li.nav_tab:hover {
  color: var(--text-primary);
}

header .song_side nav ul li.nav_tab.active_tab {
  color: var(--text-primary);
}

header .song_side nav ul li.nav_tab.active_tab span {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-accent);
}

header .song_side nav .search {
  position: relative;
  width: 280px;
  display: flex;
  align-items: center;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 6px var(--space-md);
  transition: var(--transition-normal);
}

header .song_side nav .search:focus-within {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 16px var(--accent-glow);
  background: var(--bg-surface-hover);
}

header .song_side nav .search .bi-search {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-right: var(--space-xs);
}

header .song_side nav .search input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.82rem;
  font-weight: 500;
}

header .song_side nav .search input::placeholder {
  color: var(--text-muted);
}

header .song_side nav .user {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  padding: 2px;
  background: var(--accent-gradient);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: var(--transition-bounce);
  flex-shrink: 0;
}

header .song_side nav .user:hover {
  transform: scale(1.08);
  box-shadow: var(--shadow-accent);
}

header .song_side nav .user img {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
  background: var(--bg-surface);
}

/* --------------------------------------------------------------------------
   6. HERO FEATURED SECTION & CAROUSELS (.content, .Trending, .Bliss, .Blues)
   -------------------------------------------------------------------------- */
header .song_side .content {
  position: relative;
  width: 100%;
  height: 180px;
  min-height: 180px;
  max-height: 200px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15) 0%, rgba(15, 20, 32, 0.85) 100%);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: background 0.5s ease-in-out;
}

header .song_side .content::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.2) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
  filter: blur(40px);
}

header .song_side .content .content_badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

header .song_side .content h1 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  line-height: 1.1;
}

header .song_side .content p {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.4;
  max-width: 550px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

header .song_side .content .buttons {
  margin-top: 4px;
}

header .song_side .content .buttons button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 var(--space-md);
  border: none;
  outline: none;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #07090e;
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow-accent);
  transition: var(--transition-bounce);
}

header .song_side .content .buttons button:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px rgba(0, 242, 254, 0.5);
  background: var(--accent-gradient-hover);
}

header .song_side .Trending,
header .song_side .Bliss,
header .song_side .Blues {
  width: 100%;
  margin-bottom: var(--space-lg);
}

header .song_side .Trending .h4,
header .song_side .Bliss .h4,
header .song_side .Blues .h4 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xs);
}

header .song_side .Trending .h4 h4,
header .song_side .Bliss .h4 h4,
header .song_side .Blues .h4 h4 {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

header .song_side .Trending .h4 .btn_s,
header .song_side .Bliss .h4 .btn_s,
header .song_side .Blues .h4 .btn_s {
  display: flex;
  align-items: center;
  gap: 6px;
}

header .song_side .Trending .h4 .btn_s .bi,
header .song_side .Bliss .h4 .btn_s .bi,
header .song_side .Blues .h4 .btn_s .bi {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-bounce);
}

header .song_side .Trending .h4 .btn_s .bi:hover,
header .song_side .Bliss .h4 .btn_s .bi:hover,
header .song_side .Blues .h4 .btn_s .bi:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--accent-cyan);
  transform: scale(1.1);
}

header .song_side .Trending .trending_song,
header .song_side .Bliss .bliss_song,
header .song_side .Blues .blues_song {
  width: 100%;
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  scroll-behavior: smooth;
  padding: 4px 0 var(--space-xs) 0;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}

header .song_side .Trending .trending_song::-webkit-scrollbar,
header .song_side .Bliss .bliss_song::-webkit-scrollbar,
header .song_side .Blues .blues_song::-webkit-scrollbar {
  display: none;
}

header .song_side .Trending .trending_song li.song_item,
header .song_side .Bliss .bliss_song li.song_item,
header .song_side .Blues .blues_song li.song_item {
  width: 140px;
  min-width: 140px;
  max-width: 140px;
  height: 185px;
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px;
  display: flex;
  flex-direction: column;
  list-style: none;
  cursor: pointer;
  transition: var(--transition-normal);
  backdrop-filter: blur(8px);
  scroll-snap-align: start;
  flex-shrink: 0;
}

header .song_side .Trending .trending_song li.song_item:hover,
header .song_side .Bliss .bliss_song li.song_item:hover,
header .song_side .Blues .blues_song li.song_item:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

header .song_side .Trending .trending_song li.song_item .img_play,
header .song_side .Bliss .bliss_song li.song_item .img_play,
header .song_side .Blues .blues_song li.song_item .img_play {
  position: relative;
  width: 100%;
  height: 124px;
  min-height: 124px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  margin-bottom: 6px;
}

header .song_side .Trending .trending_song li.song_item .img_play img,
header .song_side .Bliss .bliss_song li.song_item .img_play img,
header .song_side .Blues .blues_song li.song_item .img_play img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: var(--transition-normal);
}

header .song_side .Trending .trending_song li.song_item:hover .img_play img,
header .song_side .Bliss .bliss_song li.song_item:hover .img_play img,
header .song_side .Blues .blues_song li.song_item:hover .img_play img {
  transform: scale(1.06);
}

header .song_side .Trending .trending_song li.song_item .img_play .BluesPlay,
header .song_side .Bliss .bliss_song li.song_item .img_play .BluesPlay,
header .song_side .Blues .blues_song li.song_item .img_play .BluesPlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  font-size: 1.6rem;
  color: var(--accent-cyan);
  opacity: 0;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.8));
  transition: var(--transition-bounce);
  pointer-events: auto;
}

header .song_side .Trending .trending_song li.song_item:hover .img_play .BluesPlay,
header .song_side .Bliss .bliss_song li.song_item:hover .img_play .BluesPlay,
header .song_side .Blues .blues_song li.song_item:hover .img_play .BluesPlay {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

header .song_side .Trending .trending_song li.song_item h5,
header .song_side .Bliss .bliss_song li.song_item h5,
header .song_side .Blues .blues_song li.song_item h5 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

header .song_side .Trending .trending_song li.song_item h5 .subtitle,
header .song_side .Bliss .bliss_song li.song_item h5 .subtitle,
header .song_side .Blues .blues_song li.song_item h5 .subtitle {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   7. PAGES (MY LIBRARY, RADIO, SEARCH & TOASTS)
   -------------------------------------------------------------------------- */
.page_view {
  animation: fadeIn 0.35s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.search_results_container {
  width: 100%;
  margin-bottom: var(--space-lg);
  animation: fadeIn 0.3s ease-out;
}

.search_results_container .section_header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.search_results_container .section_header h4 {
  font-size: 1.15rem;
  font-weight: 800;
}

.search_results_container .badge {
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  color: var(--accent-cyan);
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.search_grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-sm);
}

.search_card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
  transition: var(--transition-bounce);
}

.search_card:hover {
  background: var(--bg-surface-hover);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.search_card .search_img {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  flex-shrink: 0;
}

.search_card .search_img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.search_card .search_img .bi {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.1rem;
  color: var(--accent-cyan);
  opacity: 0;
  transition: var(--transition-fast);
}

.search_card:hover .search_img .bi {
  opacity: 1;
}

.search_card .search_info {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.no_results {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-lg) 0;
  color: var(--text-muted);
}

.no_results .bi {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
  color: var(--text-secondary);
}

.library_hero {
  background: linear-gradient(135deg, rgba(79, 172, 254, 0.15) 0%, rgba(15, 20, 32, 0.8) 100%);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}

.library_hero .library_info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.library_hero .library_icon_badge {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: #07090e;
  box-shadow: var(--shadow-accent);
}

.library_hero .subhead {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--accent-cyan);
}

.library_hero h2 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.library_hero .meta {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.library_filter_bar {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.filter_pill {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 6px var(--space-md);
  border-radius: var(--radius-full);
  font-family: var(--font-family);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.filter_pill:hover, .filter_pill.active {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--accent-cyan);
}

.filter_pill.active {
  background: rgba(0, 242, 254, 0.12);
  color: var(--accent-cyan);
}

.track_table_container {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.track_table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 500px;
}

.track_table th {
  padding: 10px var(--space-md);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-subtle);
}

.track_table td {
  padding: 10px var(--space-md);
  font-size: 0.82rem;
  color: var(--text-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.track_row {
  cursor: pointer;
  transition: var(--transition-fast);
}

.track_row:hover {
  background: var(--bg-surface-hover);
}

.track_row .num {
  font-weight: 700;
  color: var(--text-muted);
  width: 36px;
}

.track_row .title_cell {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.track_row .title_cell img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  object-fit: cover;
}

.track_row .song_title_txt {
  font-weight: 700;
  color: var(--text-primary);
}

.track_row .song_artist_txt {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.track_row .lib_play_btn {
  background: var(--accent-gradient);
  border: none;
  color: #07090e;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
}

.track_row:hover .lib_play_btn {
  box-shadow: var(--shadow-accent);
  transform: scale(1.05);
}

.radio_hero {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15) 0%, rgba(15, 20, 32, 0.9) 100%);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.radio_hero .live_badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #ef4444;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 4px;
}

.radio_hero .pulse_dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ef4444;
  box-shadow: 0 0 8px #ef4444;
  animation: pulse 1.2s infinite alternate;
}

@keyframes pulse {
  0% { transform: scale(0.8); opacity: 0.6; }
  100% { transform: scale(1.2); opacity: 1; }
}

.radio_hero h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 2px;
}

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

.radio_grid_section h4 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.radio_grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-sm);
}

.radio_card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: var(--space-sm);
  cursor: pointer;
  transition: var(--transition-normal);
}

.radio_card:hover {
  background: var(--bg-surface-hover);
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
}

.radio_card .radio_img {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-xs);
  overflow: hidden;
  margin-bottom: 6px;
}

.radio_card .radio_img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.radio_card .radio_overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  color: var(--accent-cyan);
  opacity: 0;
  transition: var(--transition-bounce);
}

.radio_card:hover .radio_overlay {
  opacity: 1;
}

.radio_card h5 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.radio_card p {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.toast_container {
  position: fixed;
  bottom: 100px;
  right: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 999;
  pointer-events: none;
}

.toast_item {
  background: rgba(22, 29, 45, 0.95);
  border: 1px solid var(--accent-cyan);
  color: var(--text-primary);
  padding: 6px var(--space-md);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(12px);
  animation: slideInRight 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.toast_item.fade_out {
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease-out;
}

.toast_item .bi {
  color: var(--accent-cyan);
  font-size: 0.95rem;
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

/* --------------------------------------------------------------------------
   8. MASTER PLAYER DOCK (.master_play)
   -------------------------------------------------------------------------- */
header .master_play {
  grid-area: player;
  width: 100%;
  height: 85px;
  background: var(--bg-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  z-index: 100;
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.5);
}

header .master_play .master_play_info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 240px;
  min-width: 180px;
}

header .master_play .wave {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: flex-end;
  gap: 3px;
}

header .master_play .wave .wave1 {
  width: 3px;
  height: 5px;
  background: var(--accent-cyan);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

header .master_play .wave .wave1:nth-child(2) {
  height: 8px;
}

header .master_play .wave .wave1:nth-child(3) {
  height: 4px;
}

header .master_play .wave.active1 .wave1 {
  animation: waveAnim 0.6s ease-in-out infinite alternate;
}

header .master_play .wave.active1 .wave1:nth-child(2) {
  animation-delay: 0.2s;
}

header .master_play .wave.active1 .wave1:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes waveAnim {
  0% { height: 4px; }
  100% { height: 18px; }
}

header .master_play img#poster_master_play {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-xs);
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

header .master_play h5#title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 150px;
  line-height: 1.2;
}

header .master_play h5#title .subtitle {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}

header .master_play .master_play_center {
  flex: 1;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

header .master_play .icon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

header .master_play .icon .bi {
  font-size: 1.15rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-bounce);
}

header .master_play .icon .bi:hover {
  color: var(--text-primary);
  transform: scale(1.1);
}

header .master_play .icon .bi.active_mode {
  color: var(--accent-cyan) !important;
  text-shadow: 0 0 10px var(--accent-glow);
}

header .master_play .icon .bi.liked {
  color: #00f2fe !important;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

header .master_play .icon #masterPlay {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #07090e;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-accent);
  transition: var(--transition-bounce);
  padding-left: 2px;
}

header .master_play .icon #masterPlay:hover {
  transform: scale(1.1);
  background: var(--accent-gradient-hover);
}

header .master_play .icon #download_music {
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: var(--transition-bounce);
  text-decoration: none;
}

header .master_play .icon #download_music:hover {
  color: var(--accent-cyan);
}

header .master_play .timeline_container {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

header .master_play span#currentStart,
header .master_play span#currentEnd {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 30px;
  text-align: center;
}

header .master_play .bar {
  position: relative;
  flex: 1;
  height: 4px;
  background: var(--bg-surface-elevated);
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
}

header .master_play .bar .bar2 {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  box-shadow: 0 0 8px var(--accent-glow);
  transition: width 0.1s linear;
}

header .master_play .bar .dot {
  position: absolute;
  top: 50%;
  left: 0%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  background: var(--text-primary);
  border: 2px solid var(--accent-cyan);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-accent);
  transition: left 0.1s linear, transform var(--transition-fast);
  pointer-events: none;
}

header .master_play .bar:hover .dot {
  transform: translate(-50%, -50%) scale(1.2);
}

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

header .master_play .master_play_right {
  width: 180px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

header .master_play .vol {
  position: relative;
  width: 100px;
  height: 4px;
  background: var(--bg-surface-elevated);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
}

header .master_play .vol .bi#vol_icon {
  position: absolute;
  left: -24px;
  font-size: 1rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

header .master_play .vol .bi#vol_icon:hover {
  color: var(--accent-cyan);
}

header .master_play .vol .vol_bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: var(--accent-cyan);
  border-radius: var(--radius-full);
  transition: width 0.1s linear;
}

header .master_play .vol .dot#vol_dot {
  position: absolute;
  top: 50%;
  left: 100%;
  transform: translate(-50%, -50%);
  width: 9px;
  height: 9px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: left 0.1s linear;
  pointer-events: none;
}

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

/* --------------------------------------------------------------------------
   9. RESPONSIVE BREAKPOINTS & MOBILE OPTIMIZATIONS
   -------------------------------------------------------------------------- */

@media screen and (max-width: 1024px) {
  header {
    grid-template-columns: 240px 1fr;
  }
  
  header .song_side nav .search {
    width: 220px;
  }
}

/* Mobile Screens (< 768px): Fixed Always-Visible Bottom Player Dock & Padded Page Content */
@media screen and (max-width: 768px) {
  header {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
    grid-template-areas: "main";
  }

  /* Slide-Out Drawer Sidebar for Mobile */
  header .menu_side {
    position: fixed;
    top: 0;
    left: 0;
    width: 270px;
    height: 100vh;
    z-index: 10000;
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }

  header .menu_side.mobile_open {
    transform: translateX(0);
    box-shadow: 10px 0 40px rgba(0, 0, 0, 0.85);
  }

  .close_sidebar_btn {
    display: block;
  }

  .mobile_menu_btn {
    display: block;
  }

  header .song_side {
    padding: 0 var(--space-md) 100px var(--space-md) !important; /* Bottom padding prevents fixed player overlap */
  }

  header .song_side nav {
    height: 65px;
    gap: var(--space-xs);
  }

  header .song_side nav ul {
    gap: var(--space-sm);
  }

  header .song_side nav ul li.nav_tab {
    font-size: 0.8rem;
  }

  header .song_side nav .search {
    width: 150px;
    padding: 4px var(--space-xs);
  }

  header .song_side nav .search input {
    font-size: 0.78rem;
  }

  header .song_side .content {
    padding: var(--space-md);
    height: 160px;
    min-height: 160px;
  }

  header .song_side .content h1 {
    font-size: 1.5rem;
  }

  header .song_side .content p {
    font-size: 0.78rem;
  }

  header .song_side .Trending .trending_song li.song_item,
  header .song_side .Bliss .bliss_song li.song_item,
  header .song_side .Blues .blues_song li.song_item {
    width: 130px;
    min-width: 130px;
    max-width: 130px;
    height: 175px;
  }

  header .song_side .Trending .trending_song li.song_item .img_play,
  header .song_side .Bliss .bliss_song li.song_item .img_play,
  header .song_side .Blues .blues_song li.song_item .img_play {
    height: 115px;
    min-height: 115px;
  }

  /* Fixed Master Player Dock on Mobile - Always Visible */
  header .master_play {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100vw;
    height: 85px;
    z-index: 9999;
    padding: 0 var(--space-md);
    background: var(--bg-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-medium);
  }

  header .master_play .master_play_info {
    width: auto;
    max-width: 120px;
    gap: var(--space-xs);
  }

  header .master_play img#poster_master_play {
    width: 38px;
    height: 38px;
  }

  header .master_play h5#title {
    max-width: 80px;
    font-size: 0.78rem;
  }

  header .master_play .icon {
    gap: var(--space-xs);
  }

  header .master_play .icon .bi {
    font-size: 1.05rem;
  }

  header .master_play .icon #masterPlay {
    width: 34px;
    height: 34px;
    font-size: 1.15rem;
  }

  header .master_play .master_play_right {
    display: none;
  }

  .toast_container {
    bottom: 95px;
    right: var(--space-md);
  }
}

@media screen and (max-width: 480px) {
  header .song_side nav .search {
    display: none;
  }

  header .song_side .content h1 {
    font-size: 1.3rem;
  }

  header .master_play .wave {
    display: none;
  }

  header .master_play span#currentStart,
  header .master_play span#currentEnd {
    font-size: 0.65rem;
    min-width: 24px;
  }
}