:root {
  --red-deep: #7a0f1e;
  --red: #b3182f;
  --red-bright: #e63950;
  --red-soft: #ff7a8a;
  --blue-deep: #0b1f4d;
  --blue: #16337a;
  --blue-bright: #3a63c9;
  --blue-soft: #7fa6ff;
  --bg-dark: #0a0812;
  --parchment: #fdf6ee;
  --parchment-dim: #efe2d2;
  --gold: #d9b26a;
  --font-serif-en: 'Cormorant Garamond', serif;
  --font-serif-zh: 'Noto Serif TC', serif;
}

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

/* SVG 元素沒有 hidden 屬性的預設樣式，需明確指定 */
[hidden] { display: none !important; }

body {
  background: var(--bg-dark);
  color: var(--parchment);
  font-family: var(--font-serif-zh), var(--font-serif-en), serif;
  min-height: 100vh;
  overflow-x: hidden;
}

.infinity {
  display: inline-block;
  color: var(--gold);
  -webkit-text-fill-color: var(--gold);
  filter: drop-shadow(0 0 6px rgba(217,178,106,0.5));
}

#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(179,24,47,0.25), transparent 55%),
    radial-gradient(ellipse at 80% 30%, rgba(58,99,201,0.25), transparent 55%),
    radial-gradient(ellipse at 50% 90%, rgba(179,24,47,0.15), transparent 60%),
    linear-gradient(160deg, #0a0812 0%, #120a1c 40%, #0a1330 100%);
}

/* ---------- Top bar ---------- */
.player-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(10, 8, 18, 0.35);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(217,178,106,0.15);
}

.player-home {
  font-family: var(--font-serif-en);
  color: var(--parchment-dim);
  text-decoration: none;
  letter-spacing: 0.1em;
  font-size: 1rem;
  transition: color 0.3s ease;
}
.player-home:hover { color: #fff; }

.player-bar-title {
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  opacity: 0.85;
}

/* ---------- Layout ---------- */
.player-layout {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(320px, 440px) minmax(0, 1fr);
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 6.5rem 5vw 3rem;
  min-height: 100vh;
  align-items: stretch;
}

/* ---------- Left panel ---------- */
.player-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.vinyl-wrap {
  position: relative;
  width: min(62vw, 260px);
  aspect-ratio: 1;
  margin-bottom: 2rem;
}

.vinyl {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    repeating-radial-gradient(circle at center,
      rgba(255,255,255,0.05) 0px,
      rgba(255,255,255,0.05) 1px,
      transparent 1px,
      transparent 5px),
    radial-gradient(circle at 35% 30%, rgba(255,255,255,0.10), transparent 45%),
    radial-gradient(circle, #17131f 30%, #0c0a13 70%);
  border: 3px solid rgba(217,178,106,0.4);
  box-shadow:
    0 20px 60px rgba(0,0,0,0.6),
    0 0 40px rgba(217,178,106,0.12);
  animation: spin 22s linear infinite;
  animation-play-state: paused;
}

.vinyl.spinning { animation-play-state: running; }

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

.vinyl-label {
  width: 42%;
  aspect-ratio: 1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--red-deep), var(--blue-deep));
  border: 1px solid rgba(217,178,106,0.5);
  box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
}

.vinyl-symbol {
  font-family: var(--font-serif-en);
  font-size: clamp(0.7rem, 2.4vw, 0.9rem);
  letter-spacing: 0.08em;
  font-weight: 600;
  background: linear-gradient(90deg, var(--blue-soft), var(--gold), var(--red-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tonearm {
  position: absolute;
  top: -4%;
  right: 4%;
  width: 3px;
  height: 40%;
  background: linear-gradient(180deg, var(--gold), rgba(217,178,106,0.3));
  border-radius: 2px;
  transform-origin: top center;
  transform: rotate(-24deg);
  transition: transform 0.7s cubic-bezier(0.34, 1.3, 0.64, 1);
  box-shadow: 0 0 10px rgba(217,178,106,0.35);
}

.tonearm::before {
  content: '';
  position: absolute;
  top: -7px;
  left: 50%;
  transform: translateX(-50%);
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--gold), #8a6d3b);
}

.tonearm::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 14px;
  border-radius: 3px;
  background: var(--gold);
}

.tonearm.on { transform: rotate(-4deg); }

/* ---------- Now playing ---------- */
.now-playing {
  text-align: center;
  margin-bottom: 1.8rem;
}

#song-title {
  font-size: clamp(1.4rem, 3.5vw, 1.8rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  background: linear-gradient(90deg, var(--red-soft), var(--parchment) 50%, var(--blue-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.7rem;
}

.song-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
}

.song-author {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  font-family: var(--font-serif-en);
  font-size: 0.8rem;
  font-weight: 600;
  color: #fff;
}

.song-author.author-a {
  background: radial-gradient(circle, var(--blue-bright), var(--blue-deep));
}
.song-author.author-m {
  background: radial-gradient(circle, var(--red-bright), var(--red-deep));
}

.song-album {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  opacity: 0.8;
}

/* ---------- Progress ---------- */
.progress-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  width: 100%;
  margin-bottom: 1.4rem;
}

.time {
  font-family: var(--font-serif-en);
  font-size: 0.85rem;
  color: var(--parchment-dim);
  min-width: 2.6rem;
  text-align: center;
}

.progress-track {
  position: relative;
  flex: 1;
  height: 5px;
  border-radius: 999px;
  background: rgba(255,255,255,0.12);
  cursor: pointer;
  touch-action: none;
}

/* 加大點擊範圍 */
.progress-track::before {
  content: '';
  position: absolute;
  inset: -8px 0;
}

.progress-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--red-bright), var(--gold), var(--blue-bright));
  pointer-events: none;
}

.progress-thumb {
  position: absolute;
  top: 50%;
  left: 0%;
  transform: translate(-50%, -50%);
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--parchment);
  border: 2px solid var(--gold);
  box-shadow: 0 0 10px rgba(217,178,106,0.6);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.progress-track:hover .progress-thumb,
.progress-track.dragging .progress-thumb { opacity: 1; }

/* ---------- Controls ---------- */
.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  width: 100%;
  margin-bottom: 2.2rem;
}

.ctrl-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--parchment-dim);
  cursor: pointer;
  transition: color 0.3s ease, transform 0.2s ease;
}

.ctrl-btn:hover { color: #fff; transform: scale(1.1); }

.ctrl-play {
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, var(--red-bright), var(--blue-bright));
  box-shadow: 0 10px 30px rgba(230,57,80,0.3);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.ctrl-play:hover {
  transform: scale(1.06);
  box-shadow: 0 14px 36px rgba(58,99,201,0.4);
}

.ctrl-small { color: var(--parchment-dim); opacity: 0.85; }

#btn-mode.active-mode { color: var(--gold); opacity: 1; }

.volume-wrap {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

#volume {
  -webkit-appearance: none;
  appearance: none;
  width: 64px;
  height: 4px;
  border-radius: 999px;
  background: rgba(255,255,255,0.15);
  outline: none;
  cursor: pointer;
}

#volume::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px rgba(217,178,106,0.6);
}

#volume::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border: none;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- Playlist ---------- */
.playlist {
  list-style: none;
  width: 100%;
}

.playlist-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.85rem 1.1rem;
  margin-bottom: 0.5rem;
  border-radius: 6px;
  border: 1px solid rgba(217,178,106,0.14);
  background: rgba(255,255,255,0.03);
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
}

.playlist-item:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(217,178,106,0.4);
  transform: translateX(4px);
}

.playlist-item.playing {
  background: linear-gradient(90deg, rgba(230,57,80,0.15), rgba(58,99,201,0.15));
  border-color: var(--gold);
}

.playlist-num {
  font-family: var(--font-serif-en);
  font-size: 0.85rem;
  color: var(--gold);
  opacity: 0.7;
  min-width: 1.1rem;
  text-align: center;
}

/* 播放中的音波動畫 */
.playlist-item.playing .playlist-num { display: none; }

.eq {
  display: none;
  align-items: flex-end;
  gap: 2px;
  height: 14px;
  min-width: 1.1rem;
  justify-content: center;
}
.playlist-item.playing .eq { display: inline-flex; }

.eq span {
  width: 3px;
  border-radius: 1px;
  background: linear-gradient(180deg, var(--red-soft), var(--blue-soft));
  animation: eqBounce 1s ease-in-out infinite;
}
.eq span:nth-child(1) { height: 60%; animation-delay: 0s; }
.eq span:nth-child(2) { height: 100%; animation-delay: 0.25s; }
.eq span:nth-child(3) { height: 45%; animation-delay: 0.5s; }

.playlist-item.playing.paused .eq span { animation-play-state: paused; }

@keyframes eqBounce {
  0%, 100% { transform: scaleY(0.4); }
  50% { transform: scaleY(1); }
}

.playlist-title {
  flex: 1;
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  color: var(--parchment);
}

.playlist-item .song-author {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.72rem;
  flex-shrink: 0;
}

.playlist-dur {
  font-family: var(--font-serif-en);
  font-size: 0.82rem;
  color: var(--parchment-dim);
  opacity: 0.7;
}

/* ---------- Lyrics ---------- */
.lyrics-panel {
  position: relative;
  min-height: 60vh;
  border-left: 1px solid rgba(217,178,106,0.15);
  padding-left: 3rem;
}

.lyrics-scroll {
  height: calc(100vh - 6.5rem - 3rem - 4.5rem);
  min-height: 55vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(217,178,106,0.3) transparent;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 12%, #000 88%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 12%, #000 88%, transparent 100%);
}

.lyrics-scroll::-webkit-scrollbar { width: 4px; }
.lyrics-scroll::-webkit-scrollbar-thumb {
  background: rgba(217,178,106,0.3);
  border-radius: 2px;
}

.lyrics-fade { display: none; }

.lyrics-list {
  list-style: none;
  padding: 45% 0;
}

.lyrics-list li {
  padding: 0.55rem 0.4rem;
  font-size: 1.05rem;
  line-height: 1.9;
  color: rgba(239,226,210,0.4);
  letter-spacing: 0.05em;
  cursor: pointer;
  border-radius: 4px;
  transition: color 0.4s ease, transform 0.4s ease, text-shadow 0.4s ease;
  transform-origin: left center;
}

.lyrics-list li:hover { color: rgba(253,246,238,0.75); }

.lyrics-list li.active {
  color: transparent;
  background: linear-gradient(90deg, var(--red-soft), var(--parchment) 55%, var(--blue-soft));
  -webkit-background-clip: text;
  background-clip: text;
  font-weight: 600;
  font-size: 1.2rem;
  transform: translateX(6px);
}

.lyrics-list li.lyrics-empty {
  cursor: default;
  color: rgba(239,226,210,0.35);
  font-style: italic;
}

/* ---------- Footer ---------- */
.player-footer {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 1.5rem 2rem 2.5rem;
}

.player-footer p {
  color: var(--parchment-dim);
  font-style: italic;
  font-size: 0.9rem;
  opacity: 0.75;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .player-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-top: 5.5rem;
  }

  .lyrics-panel {
    border-left: none;
    border-top: 1px solid rgba(217,178,106,0.15);
    padding-left: 0;
    padding-top: 2rem;
  }

  .lyrics-scroll {
    height: 55vh;
    min-height: 0;
  }

  .lyrics-list { padding: 28% 0; }
  .lyrics-panel { min-height: 0; }
  .lyrics-list li { text-align: center; transform-origin: center; }
  .lyrics-list li.active { transform: none; }
}