/* ═══════════════════════════════════════════════════
   🎵 Naruse Music — Elegant & Modern Style Sheet (Refactored)
   ═══════════════════════════════════════════════════ */

:root {
  color-scheme: light dark;
  
  /* Fonts */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  
  /* Default Light Theme variables */
  --clr-accent: #0ea5e9;
  --clr-accent-2: #06b6d4;
  --clr-accent-3: #10b981;
  --clr-accent-soft: rgba(14, 165, 233, 0.08);
  --clr-bg: #f0f9ff;
  --clr-bg-gradient-start: #f0f9ff;
  --clr-bg-gradient-end: #ecfdf5;
  --clr-card: rgba(255, 255, 255, 0.75);
  --clr-card-solid: #ffffff;
  --clr-text: #0f172a;
  --clr-text-sub: #334155;
  --clr-text-muted: #64748b;
  --clr-border: rgba(14, 165, 233, 0.12);
  --clr-shadow-rgb: 14, 165, 233;
  --grad-main: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-2));
  
  /* Shadows & Radius */
  --shadow-card: 0 10px 30px -10px rgba(var(--clr-shadow-rgb), 0.12), 0 1px 3px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 20px 40px -10px rgba(var(--clr-shadow-rgb), 0.2), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-accent: 0 8px 24px -4px rgba(var(--clr-shadow-rgb), 0.3);
  --radius-card: 24px;
  --radius-item: 14px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* System Dark Preference Sync */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --clr-accent: #38bdf8;
    --clr-accent-2: #22d3ee;
    --clr-accent-3: #34d399;
    --clr-accent-soft: rgba(56, 189, 248, 0.12);
    --clr-bg: #0b0f19;
    --clr-bg-gradient-start: #0a0e17;
    --clr-bg-gradient-end: #061512;
    --clr-card: rgba(15, 23, 42, 0.6);
    --clr-card-solid: #1e293b;
    --clr-text: #f8fafc;
    --clr-text-sub: #cbd5e1;
    --clr-text-muted: #94a3b8;
    --clr-border: rgba(56, 189, 248, 0.15);
    --clr-shadow-rgb: 0, 0, 0;
    
    --shadow-card: 0 15px 35px -10px rgba(0, 0, 0, 0.4), 0 1px 4px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 25px 45px -10px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-accent: 0 8px 24px -4px rgba(56, 189, 248, 0.4);
  }
}

/* Explicit Theme Overrides */
[data-theme="dark"] {
  --clr-accent: #38bdf8;
  --clr-accent-2: #22d3ee;
  --clr-accent-3: #34d399;
  --clr-accent-soft: rgba(56, 189, 248, 0.12);
  --clr-bg: #0b0f19;
  --clr-bg-gradient-start: #0a0e17;
  --clr-bg-gradient-end: #061512;
  --clr-card: rgba(15, 23, 42, 0.6);
  --clr-card-solid: #1e293b;
  --clr-text: #f8fafc;
  --clr-text-sub: #cbd5e1;
  --clr-text-muted: #94a3b8;
  --clr-border: rgba(56, 189, 248, 0.15);
  --clr-shadow-rgb: 0, 0, 0;
  
  --shadow-card: 0 15px 35px -10px rgba(0, 0, 0, 0.4), 0 1px 4px rgba(0, 0, 0, 0.2);
  --shadow-hover: 0 25px 45px -10px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-accent: 0 8px 24px -4px rgba(56, 189, 248, 0.4);
}

[data-theme="light"] {
  --clr-accent: #0ea5e9;
  --clr-accent-2: #06b6d4;
  --clr-accent-3: #10b981;
  --clr-accent-soft: rgba(14, 165, 233, 0.08);
  --clr-bg: #f0f9ff;
  --clr-bg-gradient-start: #f0f9ff;
  --clr-bg-gradient-end: #ecfdf5;
  --clr-card: rgba(255, 255, 255, 0.75);
  --clr-card-solid: #ffffff;
  --clr-text: #0f172a;
  --clr-text-sub: #334155;
  --clr-text-muted: #64748b;
  --clr-border: rgba(14, 165, 233, 0.12);
  --clr-shadow-rgb: 14, 165, 233;
  
  --shadow-card: 0 10px 30px -10px rgba(var(--clr-shadow-rgb), 0.12), 0 1px 3px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 20px 40px -10px rgba(var(--clr-shadow-rgb), 0.2), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-accent: 0 8px 24px -4px rgba(var(--clr-shadow-rgb), 0.3);
}

/* Animations */
@keyframes slide-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes rotate-cover {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes pulse-soft {
  0%, 100% { box-shadow: 0 4px 18px rgba(var(--clr-shadow-rgb), 0.3); }
  50% { box-shadow: 0 6px 26px rgba(var(--clr-shadow-rgb), 0.55); }
}

/* Base resets */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: linear-gradient(160deg, var(--clr-bg-gradient-start) 0%, var(--clr-bg) 45%, var(--clr-bg-gradient-end) 100%);
  background-attachment: fixed;
  color: var(--clr-text);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 10% 15%, rgba(var(--clr-shadow-rgb), 0.06) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.05) 0%, transparent 40%);
}

body > * {
  position: relative;
  z-index: 1;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(var(--clr-shadow-rgb), 0.25);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(var(--clr-shadow-rgb), 0.45);
}

/* App Main Layout */
.music-app {
  display: flex;
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 72px);
  min-height: calc(100dvh - 72px);
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px 20px 140px 20px;
  gap: 20px;
}

/* Sidebar Styling */
.music-sidebar {
  width: 350px;
  flex-shrink: 0;
  background: var(--clr-card);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-radius: var(--radius-card);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 24px;
  box-shadow: var(--shadow-card);
  display: grid;
  grid-template-rows: auto auto auto auto 1fr auto auto;
  gap: 12px;
  max-height: calc(100vh - 108px);
  max-height: calc(100dvh - 108px);
  overflow: hidden;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

/* Search bar styling */
.music-search {
  position: relative;
}
.music-search-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background: var(--clr-card-solid);
  color: var(--clr-text);
  outline: none;
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
}
.music-search-input::placeholder {
  color: var(--clr-text-muted);
}
.music-search-input:focus {
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px rgba(var(--clr-shadow-rgb), 0.15);
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  background: rgba(var(--clr-shadow-rgb), 0.08);
  border-radius: var(--radius-sm);
  padding: 4px;
  gap: 4px;
  flex-shrink: 0;
}
.nav-tabs button {
  flex: 1;
  border: none;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  background: transparent;
  color: var(--clr-text-muted);
  border-radius: calc(var(--radius-sm) - 2px);
  transition: var(--transition);
  font-family: inherit;
}
.nav-tabs button.active {
  background: var(--clr-card-solid);
  color: var(--clr-accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

#category-list {
  max-height: 200px;
  overflow-y: auto;
}

#music-list {
  overflow-y: auto;
  padding-right: 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.music-empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  text-align: center;
  color: var(--clr-text-muted);
  font-size: 14px;
}

/* Playlist item styling */
.music-item {
  display: flex;
  gap: 12px;
  padding: 10px;
  border-radius: var(--radius-item);
  cursor: pointer;
  transition: var(--transition);
  align-items: center;
  border: 1px solid transparent;
}
.music-item:hover {
  background: var(--clr-accent-soft);
  transform: translateX(4px);
}
.music-item.active {
  background: var(--clr-accent-soft);
  border-color: rgba(var(--clr-shadow-rgb), 0.25);
}
.music-item img {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
  background: var(--clr-card-solid);
}
.music-item .song-title {
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--clr-text);
  margin-bottom: 2px;
}
.music-item .song-artist {
  font-size: 12px;
  color: var(--clr-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.song-actions {
  display: flex;
  gap: 6px;
  margin-left: auto;
  flex-shrink: 0;
}
.song-actions button {
  border: none;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: var(--transition);
}
.song-actions .q-next {
  background: rgba(var(--clr-shadow-rgb), 0.12);
  color: var(--clr-accent);
}
.song-actions .q-add {
  background: rgba(var(--clr-text-muted), 0.08);
  color: var(--clr-text-sub);
}
.song-actions button:hover {
  background: var(--clr-accent);
  color: #ffffff;
  box-shadow: var(--shadow-accent);
  transform: translateY(-1px);
}

/* Sidebar Panels (Queue, Online status) */
.sidebar-panel {
  border-top: 1px solid var(--clr-border);
  padding-top: 12px;
  margin-top: 4px;
}
.panel-title {
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: 10px;
}
.panel-list {
  max-height: 120px;
  overflow-y: auto;
  padding-right: 4px;
}
.panel-item {
  padding: 6px 0;
  border-bottom: 1px solid rgba(var(--clr-shadow-rgb), 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.panel-item .txt {
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  color: var(--clr-text-sub);
}
.panel-actions {
  margin-top: 8px;
}
.panel-actions button {
  border: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: rgba(var(--clr-shadow-rgb), 0.08);
  color: var(--clr-accent);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}
.panel-actions button:hover {
  background: var(--clr-accent);
  color: #ffffff;
  box-shadow: var(--shadow-accent);
}

/* Main Area Layout */
.music-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--clr-card);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-radius: var(--radius-card);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 36px;
  box-shadow: var(--shadow-card);
  height: calc(100vh - 108px);
  max-height: calc(100dvh - 108px);
  min-height: 580px;
  animation: slide-up 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  transition: background var(--transition), border-color var(--transition);
}

#music-main-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
  flex: 1;
  min-height: 0;
  height: 100%;
}

.player-left-col {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-shrink: 0;
}

/* Big Album Cover with Rotation effect */
.big-cover {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-item);
  background-size: cover;
  background-position: center;
  background-color: var(--clr-card-solid);
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
  position: relative;
  transition: transform 0.5s var(--transition), box-shadow 0.5s var(--transition);
}
.big-cover::before {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: calc(var(--radius-item) + 4px);
  background: var(--grad-main);
  opacity: 0.12;
  filter: blur(12px);
  z-index: -1;
}
.big-cover:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.22);
}

/* Rotation class toggled by JS when playing */
.big-cover.playing {
  /* optional: spin animation, but usually modern design prefers static/3D tilt, 
     if requested, we can use rotate-cover 20s linear infinite */
}

/* Metadata */
.player-meta-info {
  flex: 1;
  min-width: 0;
}
.now-playing-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--clr-text);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}
.now-playing-artist {
  font-size: 14px;
  color: var(--clr-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Lyrics Area with gradient fade */
.lyrics-container {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  mask-image: linear-gradient(to bottom, transparent 0%, #000000 20%, #000000 80%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000000 20%, #000000 80%, transparent 100%);
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

#player-lyrics {
  padding-top: 25vh;
  padding-bottom: 30vh;
  text-align: center;
  font-size: 18px;
  line-height: 2.2;
  color: var(--clr-text-muted);
}

.argon-player-lyrics-line {
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.4s ease, color 0.3s ease;
  opacity: 0.3;
  transform: scale(0.95);
  margin: 18px 0;
  will-change: transform, opacity;
}

.argon-player-lyrics-line.active {
  color: var(--clr-accent);
  font-weight: 700;
  font-size: 22px;
  opacity: 1;
  transform: scale(1.03);
}

.argon-player-lyrics-line.has-words.active {
  color: var(--clr-text-sub);
}

.argon-player-lyrics-word {
  display: inline-block;
  white-space: pre-wrap;
  transition: color 0.2s ease;
}

.argon-player-lyrics-line.active .argon-player-lyrics-word {
  background: linear-gradient(to right, var(--clr-accent) var(--progress, 0%), var(--clr-text-sub) var(--progress, 0%));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.argon-player-lyrics-translation {
  font-size: 14px;
  font-weight: 400;
  color: var(--clr-text-muted);
  margin-top: 6px;
  line-height: 1.4;
  transition: var(--transition);
}

.argon-player-lyrics-line.active .argon-player-lyrics-translation {
  color: var(--clr-accent-2);
}

body:not(.show-lyrics-translation) .argon-player-lyrics-translation {
  display: none !important;
}

/* Floating Player Control Bar at Bottom */
.argon-player-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 980px;
  background: var(--clr-card);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08), 0 2px 10px rgba(0, 0, 0, 0.04);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), background var(--transition), border-color var(--transition);
}
.argon-player-bar:hover {
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12), 0 4px 15px rgba(0, 0, 0, 0.06);
}

/* Progress Section */
.player-progress-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px 0 24px;
}
#player-progress {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(var(--clr-shadow-rgb), 0.15);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
  transition: height 0.2s ease;
}
#player-progress:hover {
  height: 6px;
}
#player-progress::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: var(--clr-accent);
  box-shadow: 0 0 8px rgba(var(--clr-shadow-rgb), 0.5);
  transition: width 0.2s, height 0.2s;
}
#player-progress:hover::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
}
#player-progress::-moz-range-thumb {
  width: 0;
  height: 0;
  border-radius: 50%;
  background: var(--clr-accent);
  border: none;
  transition: width 0.2s, height 0.2s;
}
#player-progress:hover::-moz-range-thumb {
  width: 14px;
  height: 14px;
}

@media (hover: none), (pointer: coarse) {
  #player-progress { height: 6px; }
  #player-progress::-webkit-slider-thumb { width: 16px; height: 16px; }
  #player-progress::-moz-range-thumb { width: 16px; height: 16px; }
}

#player-time {
  font-size: 12px;
  font-weight: 600;
  color: var(--clr-text-muted);
  font-variant-numeric: tabular-nums;
  min-width: 85px;
  text-align: right;
}

/* Playback Control Buttons */
.player-bottom-row {
  display: flex;
  align-items: center;
  padding: 8px 24px 12px 24px;
  gap: 16px;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}
.player-controls button {
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.player-controls button:hover {
  background: var(--clr-accent-soft);
  color: var(--clr-accent);
}
.player-controls button:active {
  transform: scale(0.92);
}

/* Pulsing Main Play Button */
#btn-play {
  width: 50px;
  height: 50px;
  background: var(--grad-main);
  color: #ffffff;
  border-radius: 15px;
  box-shadow: 0 4px 18px rgba(var(--clr-shadow-rgb), 0.35);
  margin: 0 6px;
  transition: var(--transition);
}
#btn-play:hover {
  transform: scale(1.06);
  animation: pulse-soft 2s infinite;
}
#btn-play:active {
  transform: scale(0.95);
}

.player-controls #btn-mode.mode-single { color: #f59e0b; }
.player-controls #btn-mode.mode-random { color: var(--clr-accent); }

#btn-trans {
  font-size: 13px;
  font-weight: bold;
  opacity: 0.6;
}
body.show-lyrics-translation #btn-trans {
  opacity: 1;
  color: var(--clr-accent);
  background: var(--clr-accent-soft);
}

/* Right Section controls */
.player-right {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--clr-text-muted);
}
#volume-slider {
  width: 80px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(var(--clr-shadow-rgb), 0.15);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}
#volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clr-accent);
  cursor: pointer;
  box-shadow: 0 0 4px rgba(var(--clr-shadow-rgb), 0.4);
}
#volume-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clr-accent);
  cursor: pointer;
  border: none;
}

#btn-sync {
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  background: rgba(var(--clr-shadow-rgb), 0.08);
  color: var(--clr-text-sub);
  font-family: inherit;
  transition: var(--transition);
  white-space: nowrap;
}
#btn-sync:hover {
  background: rgba(var(--clr-shadow-rgb), 0.16);
  color: var(--clr-accent);
}
#btn-sync.active {
  background: var(--grad-main);
  color: #ffffff;
  box-shadow: var(--shadow-accent);
}

/* Sync Room details */
.sync-room-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 24px 10px 24px;
  font-size: 12px;
  color: var(--clr-text-muted);
}
.sync-room-bar .room-code {
  font-weight: 700;
  color: var(--clr-accent);
  cursor: pointer;
  background: var(--clr-accent-soft);
  padding: 2px 8px;
  border-radius: 6px;
  transition: var(--transition);
}
.sync-room-bar .room-code:hover {
  background: rgba(var(--clr-shadow-rgb), 0.18);
}
.sync-room-bar .room-leave {
  border: none;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11px;
  cursor: pointer;
  margin-left: auto;
  color: var(--clr-text-muted);
  font-family: inherit;
  font-weight: 600;
  transition: var(--transition);
}
[data-theme="dark"] .sync-room-bar .room-leave {
  background: rgba(255, 255, 255, 0.06);
}
.sync-room-bar .room-leave:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

/* User Badge & Login */
.user-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 4px;
  border-bottom: 1px solid var(--clr-border);
  padding-bottom: 12px;
}
.user-badge .avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--grad-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 14px;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(var(--clr-shadow-rgb), 0.25);
}
.user-badge .uname {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--clr-text);
}
.user-badge .btn-login, .user-badge .btn-logout {
  border: none;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  font-weight: 700;
  font-family: inherit;
  transition: var(--transition);
}
.user-badge .btn-login {
  background: var(--grad-main);
  color: #ffffff;
  box-shadow: var(--shadow-accent);
}
.user-badge .btn-login:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(var(--clr-shadow-rgb), 0.4);
}
.user-badge .btn-logout {
  background: rgba(0, 0, 0, 0.06);
  color: var(--clr-text-sub);
}
[data-theme="dark"] .user-badge .btn-logout {
  background: rgba(255, 255, 255, 0.08);
}
.user-badge .btn-logout:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}
.user-badge .btn-rename {
  border: none;
  background: transparent;
  color: var(--clr-text-muted);
  cursor: pointer;
  font-size: 14px;
  padding: 6px;
  border-radius: 8px;
  transition: var(--transition);
}
.user-badge .btn-rename:hover {
  background: var(--clr-accent-soft);
  color: var(--clr-accent);
}

/* Modals (Auth, Rename, Join room) */
.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease;
}
.auth-overlay.hidden {
  display: none;
}
.auth-modal {
  background: var(--clr-card-solid);
  border: 1px solid var(--clr-border);
  border-radius: 24px;
  padding: 36px;
  width: 390px;
  max-width: 90vw;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  position: relative;
  animation: slide-up 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28) both;
}
.auth-modal h2 {
  font-size: 22px;
  text-align: center;
  color: var(--clr-text);
  font-weight: 800;
  margin-bottom: 24px;
}
.auth-tabs {
  display: flex;
  margin-bottom: 20px;
  border-radius: var(--radius-sm);
  background: rgba(var(--clr-shadow-rgb), 0.08);
  padding: 4px;
}
.auth-tabs button {
  flex: 1;
  border: none;
  padding: 10px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  background: transparent;
  transition: var(--transition);
  color: var(--clr-text-muted);
  border-radius: calc(var(--radius-sm) - 2px);
}
.auth-tabs button.active {
  background: var(--clr-card-solid);
  color: var(--clr-accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
.auth-field {
  margin-bottom: 16px;
}
.auth-field label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.auth-field input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
  background: var(--clr-card-solid);
  color: var(--clr-text);
  transition: var(--transition);
}
.auth-field input:focus {
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px rgba(var(--clr-shadow-rgb), 0.15);
}
.auth-submit {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--grad-main);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-accent);
}
.auth-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(var(--clr-shadow-rgb), 0.45);
}
.auth-error {
  color: #ef4444;
  font-size: 13px;
  text-align: center;
  margin-top: 14px;
  min-height: 20px;
}
.auth-close {
  position: absolute;
  top: 16px;
  right: 16px;
  border: none;
  background: rgba(var(--clr-shadow-rgb), 0.08);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  transition: var(--transition);
}
.auth-close:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

/* Header & Controls bar top-right (Language & Theme switch) */
.lang-switcher-wrap {
  position: fixed;
  top: 16px;
  right: 20px;
  z-index: 1001;
  display: flex;
  gap: 8px;
}
.lang-switcher, .theme-toggle {
  border: 1px solid var(--clr-border);
  background: var(--clr-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-sm);
  width: 38px;
  height: 38px;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
.lang-switcher:hover, .theme-toggle:hover {
  background: var(--clr-card-solid);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(var(--clr-shadow-rgb), 0.15);
}

.lang-dropdown {
  position: absolute;
  top: 44px;
  right: 0;
  background: var(--clr-card-solid);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  min-width: 110px;
}
.lang-dropdown button {
  display: block;
  width: 100%;
  border: none;
  background: transparent;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
  color: var(--clr-text-sub);
}
.lang-dropdown button:hover {
  background: var(--clr-accent-soft);
  color: var(--clr-accent);
}
.lang-dropdown button.active {
  background: var(--clr-accent-soft);
  color: var(--clr-accent);
  font-weight: 700;
}

/* Online user lists */
.online-user {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 4px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}
.online-user .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-accent-3);
  flex-shrink: 0;
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.6);
}
.online-user .u-name {
  font-weight: 600;
  color: var(--clr-text);
}
.online-user .u-song {
  font-size: 11px;
  color: var(--clr-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}
.online-user .u-song::before {
  content: '🎵 ';
}
.online-user .join-room-btn {
  border: none;
  background: var(--grad-main);
  color: #ffffff;
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  margin-left: auto;
  flex-shrink: 0;
}
.online-user .join-room-btn:hover {
  opacity: 0.9;
  transform: translateY(-0.5px);
}

/* Stats Page Styling */
.stats-page {
  padding: 6px 2px;
}
.stats-header {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  gap: 12px;
}
.stat-card {
  flex: 1;
  background: linear-gradient(135deg, rgba(var(--clr-shadow-rgb), 0.08), rgba(16, 185, 129, 0.05));
  border: 1px solid var(--clr-border);
  border-radius: 16px;
  padding: 14px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.stat-card .num {
  font-size: 24px;
  font-weight: 800;
  color: var(--clr-accent);
}
.stat-card .label {
  font-size: 11px;
  color: var(--clr-text-muted);
  margin-top: 4px;
  text-transform: uppercase;
}

.stats-section h3 {
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--clr-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.stats-song-item {
  display: flex;
  align-items: center;
  padding: 8px;
  border-bottom: 1px solid var(--clr-border);
  gap: 10px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.stats-song-item:hover {
  background: var(--clr-accent-soft);
}
.stats-song-item .rank {
  width: 20px;
  font-size: 13px;
  font-weight: 800;
  color: var(--clr-text-muted);
  text-align: center;
}
.stats-song-item .info {
  flex: 1;
  min-width: 0;
}
.stats-song-item .info .title {
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--clr-text);
  margin-bottom: 2px;
}
.stats-song-item .info .meta {
  font-size: 11px;
  color: var(--clr-text-muted);
}
.stats-song-item .count {
  font-size: 13px;
  font-weight: 800;
  color: var(--clr-accent);
}

.stats-main-header {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.stats-main-card {
  flex: 1;
  min-width: 140px;
  background: linear-gradient(135deg, rgba(var(--clr-shadow-rgb), 0.08), rgba(16, 185, 129, 0.05));
  border: 1px solid var(--clr-border);
  border-radius: 18px;
  padding: 20px;
  text-align: center;
  transition: var(--transition);
}
.stats-main-card:hover {
  transform: translateY(-2px);
}
.stats-main-card .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--clr-accent);
}
.stats-main-card .label {
  font-size: 12px;
  color: var(--clr-text-muted);
  margin-top: 6px;
}

.stats-chart-wrap {
  background: rgba(var(--clr-shadow-rgb), 0.04);
  border: 1px solid var(--clr-border);
  border-radius: 18px;
  padding: 20px;
  margin-bottom: 16px;
}
.stats-chart-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--clr-text-sub);
}
.stats-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 180px;
  padding: 0 4px;
}
.stats-bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  position: relative;
  min-width: 0;
}
.stats-bar {
  width: 100%;
  max-width: 38px;
  min-height: 3px;
  background: var(--grad-main);
  border-radius: 6px 6px 0 0;
  transition: var(--transition);
  opacity: 0.6;
}
.stats-bar-col:hover .stats-bar {
  opacity: 1;
  transform: scaleX(1.05);
}
.stats-bar-col.active .stats-bar {
  box-shadow: 0 0 0 2px var(--clr-accent);
  opacity: 1;
}
.stats-bar-label {
  font-size: 10px;
  color: var(--clr-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  text-align: center;
}

.stats-day-detail {
  background: rgba(var(--clr-shadow-rgb), 0.04);
  border: 1px solid var(--clr-border);
  border-radius: 18px;
  padding: 20px;
  margin-bottom: 16px;
}
.stats-day-detail h3 {
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--clr-text-sub);
}
.stats-day-detail .back-btn {
  border: none;
  background: rgba(var(--clr-shadow-rgb), 0.08);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 12px;
  cursor: pointer;
  margin-bottom: 12px;
  color: var(--clr-accent);
  font-family: inherit;
  font-weight: 700;
  transition: var(--transition);
}
.stats-day-detail .back-btn:hover {
  background: rgba(var(--clr-shadow-rgb), 0.16);
}
.stats-day-song {
  display: flex;
  align-items: center;
  padding: 8px;
  border-bottom: 1px solid var(--clr-border);
  gap: 10px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.stats-day-song:hover {
  background: var(--clr-accent-soft);
}
.stats-day-song .info {
  flex: 1;
  min-width: 0;
}
.stats-day-song .info .title {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.stats-day-song .info .meta {
  font-size: 11px;
  color: var(--clr-text-muted);
}
.stats-day-song .count {
  font-size: 13px;
  font-weight: 700;
  color: var(--clr-accent);
}

.stats-login-hint {
  text-align: center;
  padding: 36px 16px;
  color: var(--clr-text-muted);
  font-size: 14px;
}
.stats-login-hint button {
  border: none;
  background: var(--grad-main);
  color: #ffffff;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-size: 14px;
  cursor: pointer;
  font-weight: 700;
  font-family: inherit;
  margin-top: 14px;
  box-shadow: var(--shadow-accent);
  transition: var(--transition);
}
.stats-login-hint button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(var(--clr-shadow-rgb), 0.4);
}

/* Sidebar Toggle FAB */
.sidebar-toggle-btn {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1100;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--clr-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: var(--shadow-card);
  color: var(--clr-text-sub);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.sidebar-toggle-btn:hover {
  background: var(--clr-card-solid);
  color: var(--clr-accent);
}
.sidebar-toggle-btn:active {
  transform: scale(0.92);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1199;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.sidebar-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

#music-main-content.hidden { display: none !important; }
#stats-main-content.hidden { display: none !important; }

/* ─── Responsive Adjustments ─── */
@media (max-width: 1024px) {
  .music-app {
    gap: 16px;
    padding: 20px 12px 140px 12px;
  }
  .music-sidebar {
    width: 300px;
  }
}

@media (max-width: 992px) {
  .sidebar-toggle-btn {
    display: flex;
  }
  .sidebar-overlay {
    display: block;
  }
  .music-app {
    flex-direction: column;
    min-height: auto;
    padding: 76px 12px 180px 12px;
  }
  .music-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(340px, 85vw);
    max-height: 100dvh;
    height: 100dvh;
    z-index: 1200;
    border-radius: 0 24px 24px 0;
    transform: translateX(-110%);
    box-shadow: 10px 0 40px rgba(0, 0, 0, 0.15);
    background: var(--clr-card-solid);
    padding: 24px 24px 40px 24px;
    grid-template-rows: auto auto auto auto 1fr auto auto;
    overflow-y: auto;
  }
  .music-sidebar.open {
    transform: translateX(0);
  }
  .music-main {
    min-height: 480px;
    padding: 24px 20px;
    background: var(--clr-card-solid);
  }
  .argon-player-bar {
    left: 12px;
    right: 12px;
    transform: none;
    width: auto;
    bottom: calc(12px + env(safe-area-inset-bottom));
  }
  
  .player-left-col {
    gap: 16px;
  }
  .big-cover {
    width: 72px;
    height: 72px;
    border-radius: 12px;
  }
  .now-playing-title {
    font-size: 18px;
  }
  
  .desktop-text { display: none; }
  .mobile-text { display: inline; }
}

@media (min-width: 993px) {
  .desktop-text { display: inline; }
  .mobile-text { display: none; }
}

@media (max-width: 620px) {
  .volume-control {
    display: none;
  }
  .argon-player-bar {
    border-radius: 16px;
  }
  .player-bottom-row {
    padding: 8px 16px 12px 16px;
  }
  .player-controls button {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }
  #btn-play {
    width: 44px;
    height: 44px;
    border-radius: 12px;
  }
  #btn-sync {
    padding: 6px 12px;
    font-size: 11px;
  }
}

@media (max-width: 420px) {
  .argon-player-bar {
    border-radius: 14px;
  }
  .player-progress-row {
    padding: 8px 16px 0 16px;
  }
  .player-bottom-row {
    gap: 8px;
  }
  .player-controls button {
    width: 32px;
    height: 32px;
  }
  #btn-play {
    width: 38px;
    height: 38px;
  }
}