.song-player-page {
  --sp-accent: #4f46e5;
  --sp-chord: #b45309;
  --sp-bg: #fafafa;
  --sp-surface: #fff;
  --sp-border: #e5e7eb;
  --sp-muted: #6b7280;
  min-height: 100vh;
  background: var(--sp-bg);
  color: #111827;
  font-family: "PingFang TC", "Heiti TC", system-ui, sans-serif;
}

.song-topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--sp-border);
  backdrop-filter: blur(8px);
}

.song-back {
  color: var(--sp-accent);
  text-decoration: none;
  font-size: 0.85rem;
  white-space: nowrap;
}

.song-topbar-title {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.song-topbar-actions {
  display: flex;
  gap: 0.35rem;
}

.song-icon-btn {
  border: 1px solid var(--sp-border);
  background: var(--sp-surface);
  border-radius: 8px;
  padding: 0.35rem 0.55rem;
  font-size: 0.75rem;
  cursor: pointer;
}

.song-icon-btn.is-active {
  background: #eef2ff;
  border-color: var(--sp-accent);
  color: var(--sp-accent);
}

.song-meta-card {
  margin: 0.75rem;
  background: var(--sp-surface);
  border: 1px solid var(--sp-border);
  border-radius: 14px;
  overflow: hidden;
}

.song-meta-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  border: none;
  background: transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.song-meta-body {
  padding: 0 0.85rem 0.85rem;
  border-top: 1px solid var(--sp-border);
}

.song-meta-body[hidden] {
  display: none;
}

.song-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.song-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: #f3f4f6;
  color: #374151;
}

.song-tag--key {
  background: #eef2ff;
  color: var(--sp-accent);
}

.song-rich-note {
  margin: 0 0.75rem 0.5rem;
  padding: 0.55rem 0.75rem;
  font-size: 0.8rem;
  color: var(--sp-muted);
  background: #f0f9ff;
  border: 1px solid #bae6fd;
  border-radius: 10px;
}

.song-main {
  position: relative;
  padding: 0 0.75rem 6rem;
}

body.song-has-chord-dock {
  --song-dock-h: 10.5rem;
}

body.song-has-chord-dock.song-chord-dock-collapsed {
  --song-dock-h: 2.85rem;
}

body.song-has-chord-dock .song-main {
  padding-bottom: calc(var(--song-dock-h) + 4.75rem);
}

body.song-has-chord-dock .song-fab-group {
  bottom: calc(var(--song-dock-h) + 0.65rem + env(safe-area-inset-bottom, 0px));
}

.song-chord-dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 43;
  background: rgba(255, 255, 255, 0.98);
  border-top: 1px solid var(--sp-border);
  box-shadow: 0 -6px 24px rgba(17, 24, 39, 0.1);
  backdrop-filter: blur(10px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.song-chord-dock[hidden] {
  display: none !important;
}

.song-chord-dock-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.75rem;
  border: none;
  background: transparent;
  font: inherit;
  cursor: pointer;
  text-align: left;
}

.song-chord-dock-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--sp-muted);
  flex-shrink: 0;
}

.song-chord-dock-chips {
  flex: 1;
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  min-width: 0;
}

.song-chord-dock-chip {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  background: #fef3c7;
  color: var(--sp-chord);
}

.song-chord-dock-chevron {
  flex-shrink: 0;
  font-size: 0.7rem;
  color: var(--sp-muted);
}

.song-chord-dock-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 0 0.5rem 0.55rem;
}

.song-chord-dock-scroll::-webkit-scrollbar {
  display: none;
}

.song-chord-dock-scroll[hidden] {
  display: none;
}

.song-chord-dock-grid {
  display: flex;
  gap: 0.55rem;
  padding: 0 0.25rem;
  width: max-content;
  min-width: 100%;
  justify-content: center;
}

.song-chord-dock-card {
  flex: 0 0 auto;
  width: 5.5rem;
  margin: 0;
  text-align: center;
}

.song-chord-dock-card img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--sp-border);
  background: #fff;
  display: block;
}

.song-chord-dock-card figcaption {
  margin-top: 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1.2;
}

.song-chord-dock-name {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--sp-chord);
}

.song-chord-dock-real {
  font-size: 0.58rem;
  color: var(--sp-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 5.5rem;
}

@media (min-width: 520px) {
  body.song-has-chord-dock {
    --song-dock-h: 11.25rem;
  }

  .song-chord-dock-card {
    width: 6.25rem;
  }

  .song-chord-dock-real {
    max-width: 6.25rem;
  }
}

.song-content {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: var(--sp-font, 16px);
  line-height: 1.5;
}

.song-section-title {
  font-weight: 700;
  color: var(--sp-muted);
  margin: 1rem 0 0.5rem;
  font-size: calc(var(--sp-font, 16px) * 0.95);
}

.song-section-title:first-child {
  margin-top: 0.25rem;
}

.song-lyrics {
  margin: 0.2rem 0 0.55rem;
  padding: 0 0.15rem;
  font-family: "PingFang TC", "Heiti TC", system-ui, sans-serif;
  font-size: calc(var(--sp-font, 16px) * 0.92);
  line-height: 1.65;
  color: #374151;
  letter-spacing: 0.02em;
}

.song-bar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.15rem 0.1rem;
  margin-bottom: 0.65rem;
}

.song-bar-sep {
  flex: 0 0 auto;
  align-self: center;
  color: var(--sp-chord);
  opacity: 0.4;
  font-weight: 300;
  font-size: 0.85em;
  padding: 0 0.05rem;
  user-select: none;
  pointer-events: none;
  line-height: 1;
}

.song-bar {
  flex: 1 1 0;
  min-width: 0;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.35rem 0.2rem 0.45rem;
  cursor: pointer;
  position: relative;
  box-sizing: border-box;
}

.song-bar-num {
  position: absolute;
  top: 2px;
  left: 4px;
  font-size: 0.55rem;
  color: var(--sp-chord);
  opacity: 0.55;
}

.song-bar-chords {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-end;
  gap: 0.2rem 0.35rem;
  padding-top: 0.55rem;
}

.song-chord-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  min-width: 1.6em;
}

.song-chord-beats {
  display: flex;
  justify-content: center;
  gap: 0.18rem;
  min-height: 0.45rem;
}

.song-chord-beat-dot {
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: #d1d5db;
  transition: background 0.08s, transform 0.08s;
}

.song-chord-beat-dot.is-on {
  background: #a5b4fc;
}

.song-chord-beat-dot.is-active {
  background: var(--sp-accent);
  transform: scale(1.2);
}

.song-chord-beat-dot.is-downbeat.is-active {
  background: #f59e0b;
}

.song-bar:not(.is-current) .song-chord-beat-dot {
  opacity: 0.45;
}

.song-bar.is-current .song-chord-beat-dot.is-on {
  opacity: 1;
}

.song-chord {
  font-weight: 700;
  color: var(--sp-chord);
  padding: 0.1rem 0.2rem;
  border-radius: 4px;
  border: 1.5px solid transparent;
}

.song-chord.is-active-chord {
  border-color: var(--sp-accent);
  background: #eef2ff;
  color: var(--sp-accent);
}

.song-bar.is-highlight {
  background: #fef3c7;
  border-color: #fbbf24;
}

.song-bar.is-current {
  background: #eef2ff;
  border-color: var(--sp-accent);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

.song-section-nav {
  position: fixed;
  left: 14px;
  bottom: max(1.25rem, env(safe-area-inset-bottom, 0px));
  z-index: 35;
  display: flex;
  flex-direction: column-reverse;
  align-items: flex-start;
  gap: 0.35rem;
}

.section-nav-toggle {
  border: 1px solid var(--sp-border);
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 0.35rem 0.5rem;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.section-nav-list {
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid var(--sp-border);
  border-radius: 12px;
  padding: 0.35rem;
  max-height: min(45vh, calc(100vh - 10rem));
  overflow-y: auto;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.section-nav-list[hidden] {
  display: none;
}

.section-nav-item {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
  font-size: 0.72rem;
  cursor: pointer;
}

.section-nav-item.is-active,
.section-nav-item:hover {
  background: #eef2ff;
  color: var(--sp-accent);
}

.song-play-bar {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 45;
  background: #eef2ff;
  border-bottom: 1px solid #c7d2fe;
  padding: 0.5rem 0.75rem;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.12);
}

.song-play-bar[hidden] {
  display: none;
}

.song-play-bar-inner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  max-width: 640px;
  margin: 0 auto;
}

.song-beat-dots {
  display: flex;
  gap: 0.3rem;
}

.song-beat-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #c7d2fe;
}

.song-beat-dot.is-on {
  background: var(--sp-accent);
}

.song-beat-dot.is-on.is-downbeat {
  background: #dc2626;
}

.song-beat-dot.is-countdown.is-on {
  background: #f59e0b;
}

.song-beat-dot.is-countdown.is-on.is-downbeat {
  background: #ea580c;
}

.song-play-info {
  flex: 1;
  font-size: 0.8rem;
  font-weight: 600;
}

.song-play-stop {
  border: none;
  background: var(--sp-accent);
  color: #fff;
  border-radius: 8px;
  padding: 0.4rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.song-fab-group {
  position: fixed;
  right: 14px;
  bottom: max(1.25rem, env(safe-area-inset-bottom, 0px));
  z-index: 44;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.45rem;
}

.song-fab {
  border: none;
  border-radius: 999px;
  padding: 0.6rem 0.95rem;
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

.song-fab:disabled {
  opacity: 0.55;
  cursor: wait;
}

.song-fab--play {
  background: var(--sp-accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
}

.song-fab--play.is-active {
  background: #4338ca;
}

.song-fab--click {
  background: #fff;
  color: #b45309;
  border: 2px solid #f59e0b;
}

.song-fab--click.is-active {
  background: #fef3c7;
  border-color: #ea580c;
  color: #9a3412;
}

.song-loading,
.song-error {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--sp-muted);
}

.songs-hub {
  min-height: 100vh;
  background: #f8fafc;
  padding: 1.5rem 1rem 3rem;
}

.songs-hub h1 {
  text-align: center;
  font-size: 1.35rem;
  margin-bottom: 0.35rem;
}

.songs-hub .subtitle {
  text-align: center;
  color: var(--sp-muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.songs-list {
  max-width: 420px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.song-list-card {
  display: block;
  padding: 1rem;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
}

.song-list-card:hover {
  border-color: #a5b4fc;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.1);
}

.song-list-card h2 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.song-list-card p {
  font-size: 0.82rem;
  color: #6b7280;
}

.songs-back {
  display: block;
  text-align: center;
  margin-top: 1.5rem;
  color: #4f46e5;
}

.songs-empty {
  text-align: center;
  padding: 2rem;
  color: #6b7280;
  font-size: 0.9rem;
}