/* ─── Lyric Player — Classical Score Theme ─── */

/* ── Score Theme Variables ── */
:root {
  --score-paper: #F9F8F8;
  --score-paper-warm: #F4F2F3;
  --score-card: #FFFFFF;
  --score-ink: #231F1E;
  --score-body: #4A4442;
  --score-muted: #847B76;
  --score-light: #B5ADA8;
  --score-staff: rgba(100, 85, 78, 0.08);
  --score-staff-bold: rgba(100, 85, 78, 0.18);
  --score-accent: #7A3B4E;
  --score-rose: #9E5A6C;
  --score-gold: #B8A9C9;
  --score-border: rgba(100, 85, 78, 0.14);
  --score-shadow: 0 2px 12px rgba(40, 30, 35, 0.06);
  --score-shadow-md: 0 4px 20px rgba(40, 30, 35, 0.08);
}
html.dark {
  --score-paper: #1A1617;
  --score-paper-warm: #201C1D;
  --score-card: #252022;
  --score-ink: #EBE5DF;
  --score-body: #C2BAB5;
  --score-muted: #8A807B;
  --score-light: #5A524E;
  --score-staff: rgba(200, 180, 175, 0.06);
  --score-staff-bold: rgba(200, 180, 175, 0.13);
  --score-accent: #C46B7C;
  --score-rose: #D48A98;
  --score-gold: #C8B9DB;
  --score-border: rgba(200, 180, 175, 0.10);
  --score-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
  --score-shadow-md: 0 4px 20px rgba(0, 0, 0, 0.25);
}

/* ── Global Score Background ── */
body {
  background: var(--score-paper);
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 23px,
      var(--score-staff) 23px,
      var(--score-staff) 24px
    );
  background-size: 100% 120px;
  background-position: 0 60px;
}
html.dark body {
  background: var(--score-paper);
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 23px,
      var(--score-staff) 23px,
      var(--score-staff) 24px
    );
  background-size: 100% 120px;
  background-position: 0 60px;
}

/* ── Layout ── */
.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 48px;
  position: relative;
}

/* Two-column grid */
.player-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 20px;
  align-items: start;
}
.controls-panel {
  position: sticky;
  top: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.lyrics-panel {
  min-height: 400px;
}

/* ── Title — Classical Score Header ── */
.app-title {
  text-align: center;
  margin-bottom: 36px;
  padding: 20px 0;
  position: relative;
}
/* 雙線裝飾 */
.app-title::before,
.app-title::after {
  content: '';
  display: block;
  margin: 0 auto;
  border-top: 2px solid var(--score-staff-bold);
  border-bottom: 1px solid var(--score-staff-bold);
  height: 4px;
  max-width: 320px;
}
.app-title::before { margin-bottom: 16px; }
.app-title::after { margin-top: 16px; }
.app-title h1 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 28px;
  font-weight: 700;
  color: var(--score-ink);
  margin-bottom: 4px;
  letter-spacing: 2px;
  font-style: italic;
}
.title-icon { flex-shrink: 0; }
.app-title p {
  font-size: 14px;
  color: var(--score-muted);
  font-style: italic;
  letter-spacing: 1px;
}

/* ── Upload Zone — Manuscript Frame ── */
.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 64px 24px;
  border: 2px solid var(--score-border);
  border-radius: 8px;
  background: var(--score-card);
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
  box-shadow: var(--score-shadow);
}
/* 角落裝飾 */
.upload-zone::before,
.upload-zone::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border-color: var(--score-accent);
  border-style: solid;
  opacity: 0.4;
}
.upload-zone::before {
  top: 8px; left: 8px;
  border-width: 2px 0 0 2px;
}
.upload-zone::after {
  bottom: 8px; right: 8px;
  border-width: 0 2px 2px 0;
}
.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--score-accent);
  background: var(--score-paper-warm);
}
.upload-zone svg { color: var(--score-muted); }
.upload-zone p {
  font-size: 16px;
  color: var(--score-body);
}
.upload-zone .hint {
  font-size: 12px;
  color: var(--score-light);
  font-style: italic;
}
.upload-zone input[type="file"] { display: none; }

/* ── Player Section ── */
.player-section { display: none; }
.player-section.visible { display: block; }

/* Track Info — 曲名 */
.track-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--score-staff-bold);
}
.track-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--score-ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
  font-style: italic;
  letter-spacing: 1px;
}
.btn-change {
  flex-shrink: 0;
  padding: 6px 14px;
  font-size: 12px;
  font-family: var(--font-main);
  font-weight: 500;
  color: var(--score-muted);
  background: none;
  border: 1px solid var(--score-border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-change:hover {
  border-color: var(--score-accent);
  color: var(--score-accent);
}

/* ── Player Controls — Score Card ── */
.player-controls {
  background: var(--score-card);
  border-radius: 12px;
  padding: 20px 24px;
  box-shadow: var(--score-shadow-md);
  margin-bottom: 16px;
  border: 1px solid var(--score-border);
  position: relative;
}
/* 小節線裝飾 */
.player-controls::before {
  content: '';
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 0;
  width: 3px;
  background: var(--score-staff-bold);
  border-radius: 0 2px 2px 0;
}

.progress-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.time-label {
  font-size: 12px;
  color: var(--score-muted);
  min-width: 40px;
  font-variant-numeric: tabular-nums;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}
.time-label:last-child { text-align: right; }

.progress-bar {
  flex: 1;
  height: 4px;
  background: var(--score-staff-bold);
  border-radius: 2px;
  position: relative;
  cursor: pointer;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--score-rose), var(--score-accent));
  border-radius: 2px;
  width: 0%;
  transition: width 0.1s linear;
  pointer-events: none;
}

.controls-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.btn-player {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--score-rose), var(--score-accent));
  color: #FFFFFF;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 2px 8px rgba(122, 59, 78, 0.25);
}
.btn-player:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(122, 59, 78, 0.35);
}
.btn-player:active { transform: scale(0.95); }
.btn-player.small {
  width: 36px;
  height: 36px;
  background: transparent;
  color: var(--score-muted);
  box-shadow: none;
}
.btn-player.small:hover { color: var(--score-accent); }

.volume-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.volume-wrapper svg { color: var(--score-muted); }
.volume-slider {
  width: 80px;
  height: 3px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--score-staff-bold);
  border-radius: 2px;
  outline: none;
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--score-accent);
  cursor: pointer;
}

/* ── Action Bar — Score Buttons ── */
.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
}
.btn-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 14px;
  font-family: var(--font-main);
  font-weight: 500;
  border: 1px solid var(--score-border);
  border-radius: 8px;
  background: var(--score-card);
  color: var(--score-body);
  cursor: pointer;
  transition: all 0.2s;
}
.btn-action:hover {
  border-color: var(--score-accent);
  color: var(--score-accent);
}
.btn-action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.btn-action.primary {
  background: linear-gradient(135deg, var(--score-rose), var(--score-accent));
  color: #FFFFFF;
  border: none;
}
.btn-action.primary:hover { opacity: 0.9; }
.btn-action.primary:disabled { opacity: 0.4; }
.btn-action input[type="file"] { display: none; }

/* Language Select */
.lang-label {
  font-size: 12px;
  color: var(--score-light);
  font-weight: 500;
  white-space: nowrap;
  font-style: italic;
}
.lang-select {
  padding: 8px 12px;
  font-size: 14px;
  font-family: var(--font-main);
  font-weight: 500;
  border: 1px solid var(--score-border);
  border-radius: 8px;
  background: var(--score-card);
  color: var(--score-body);
  cursor: pointer;
  outline: none;
}

/* ── AI Progress ── */
.ai-progress {
  display: none;
  padding: 16px 20px;
  background: var(--score-card);
  border-radius: 8px;
  margin-bottom: 16px;
  box-shadow: var(--score-shadow);
  border: 1px solid var(--score-border);
}
.ai-progress.visible { display: block; }
.ai-progress .progress-bar {
  margin-bottom: 8px;
  height: 6px;
}
.ai-progress .progress-fill {
  transition: width 0.3s;
}
.ai-status {
  font-size: 14px;
  color: var(--score-muted);
  text-align: center;
  font-style: italic;
}

/* ── Lyrics Container — Sheet Music ── */
.lyrics-container {
  background: var(--score-card);
  border-radius: 12px;
  box-shadow: var(--score-shadow-md);
  overflow: hidden;
  min-height: 320px;
  border: 1px solid var(--score-border);
  position: relative;
}
/* 左右雙豎線（樂譜系統邊界） */
.lyrics-container::before,
.lyrics-container::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--score-staff-bold);
  z-index: 1;
}
.lyrics-container::before { left: 0; }
.lyrics-container::after {
  right: 0;
  width: 4px;
  background: linear-gradient(to right, transparent 0px, var(--score-staff-bold) 0px, var(--score-staff-bold) 1px, transparent 1px, transparent 3px, var(--score-staff-bold) 3px);
}

.lyrics-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 80px 24px;
  text-align: center;
  color: var(--score-muted);
}
.lyrics-placeholder svg { color: var(--score-light); }
.lyrics-placeholder p { font-size: 14px; font-style: italic; }

.lyrics-scroll {
  height: 420px;
  overflow-y: auto;
  padding: 120px 24px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  /* 五線譜背景 */
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 23px,
      var(--score-staff) 23px,
      var(--score-staff) 24px
    );
  background-size: 100% 120px;
  background-position: 0 0;
}
/* 隱藏捲軸 */
.lyrics-scroll::-webkit-scrollbar { width: 3px; }
.lyrics-scroll::-webkit-scrollbar-track { background: transparent; }
.lyrics-scroll::-webkit-scrollbar-thumb {
  background: var(--score-light);
  border-radius: 2px;
}

.lyric-line {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--score-muted);
  text-align: center;
  cursor: pointer;
  transition: all 0.35s ease;
  border-radius: 8px;
}
.lyric-time {
  font-size: 12px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-variant-numeric: tabular-nums;
  color: var(--score-light);
  flex-shrink: 0;
  opacity: 0.5;
  transition: opacity 0.3s;
}
.lyric-line:hover .lyric-time { opacity: 1; }
.lyric-line.active .lyric-time {
  color: var(--score-accent);
  opacity: 0.8;
}
.lyric-line:hover {
  color: var(--score-body);
  background: rgba(122, 59, 78, 0.04);
}
.lyric-line.active {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--score-ink);
  transform: scale(1.02);
  font-style: italic;
  background: rgba(122, 59, 78, 0.06);
  box-shadow: inset 3px 0 0 var(--score-accent), inset -3px 0 0 var(--score-accent);
}
.lyric-line.past { opacity: 0.45; }

/* ── Edit Mode ── */
.edit-container {
  display: none;
  padding: 24px;
}
.edit-container.visible { display: block; }

.edit-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.edit-time {
  width: 80px;
  padding: 6px 8px;
  font-size: 14px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-variant-numeric: tabular-nums;
  border: 1px solid var(--score-border);
  border-radius: 8px;
  background: var(--score-paper);
  color: var(--score-body);
  text-align: center;
  outline: none;
}
.edit-time:focus { border-color: var(--score-accent); }

.edit-text {
  flex: 1;
  padding: 6px 12px;
  font-size: 16px;
  font-family: var(--font-main);
  font-weight: 500;
  border: 1px solid var(--score-border);
  border-radius: 8px;
  background: var(--score-paper);
  color: var(--score-body);
  outline: none;
}
.edit-text:focus { border-color: var(--score-accent); }

.btn-delete-row {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--score-light);
  cursor: pointer;
  transition: all 0.2s;
}
.btn-delete-row:hover {
  background: rgba(122, 59, 78, 0.1);
  color: #A04858;
}

/* Nudge time buttons */
.btn-nudge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 28px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--score-muted);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s;
  padding: 0;
}
.btn-nudge:hover {
  background: rgba(122, 59, 78, 0.08);
  color: var(--score-accent);
}
.btn-nudge:active { transform: scale(0.9); }

/* Insert row button */
.btn-insert-row {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--score-light);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
}
.btn-insert-row:hover {
  background: rgba(100, 140, 100, 0.1);
  color: #6E8C5C;
}

.edit-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 12px 24px;
  font-size: 14px;
  font-family: var(--font-main);
  background: var(--score-ink);
  color: var(--score-paper);
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(40, 30, 35, 0.2);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
  z-index: 1000;
  max-width: 90vw;
  text-align: center;
}
.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.error { background: #8C3848; }

/* ── Dark Mode Toggle ── */
.theme-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--score-border);
  border-radius: 50%;
  background: var(--score-card);
  color: var(--score-muted);
  box-shadow: var(--score-shadow-md);
  cursor: pointer;
  transition: all 0.2s;
  z-index: 100;
}
.theme-toggle:hover {
  transform: scale(1.1);
  color: var(--score-accent);
}

/* ── Preview Button (edit mode) ── */
.btn-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--score-accent);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
}
.btn-preview:hover {
  background: rgba(122, 59, 78, 0.08);
  transform: scale(1.15);
}

/* ── Tap Mode Panel ── */
.tap-panel {
  background: var(--score-card);
  border-radius: 8px;
  padding: 16px;
  box-shadow: var(--score-shadow);
  border: 1px solid var(--score-border);
}
.tap-hint {
  font-size: 14px;
  color: var(--score-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}
.tap-hint kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  background: var(--score-paper-warm);
  border: 1px solid var(--score-border);
  border-radius: 4px;
  color: var(--score-body);
}
.tap-textarea {
  width: 100%;
  padding: 12px;
  font-size: 14px;
  font-family: var(--font-main);
  font-weight: 500;
  line-height: 1.8;
  border: 1px solid var(--score-border);
  border-radius: 8px;
  background: var(--score-paper);
  color: var(--score-body);
  resize: vertical;
  outline: none;
}
.tap-textarea:focus { border-color: var(--score-accent); }
.tap-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}
.tap-status {
  text-align: center;
  margin-top: 12px;
}
.tap-status p {
  font-size: 14px;
  color: var(--score-muted);
}
.tap-status kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  background: var(--score-paper-warm);
  border: 1px solid var(--score-border);
  border-radius: 4px;
}
.tap-progress {
  font-size: 20px;
  font-weight: 700;
  color: var(--score-accent);
  margin-top: 8px;
}

/* ── Export Preview Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 22, 23, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
}
.modal-card {
  background: var(--score-card);
  border-radius: 12px;
  box-shadow: 0 8px 40px rgba(40, 30, 35, 0.2);
  border: 1px solid var(--score-border);
  width: 100%;
  max-width: 560px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 2px solid var(--score-staff-bold);
}
.modal-header h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--score-ink);
  font-style: italic;
}
.btn-modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--score-muted);
  cursor: pointer;
}
.btn-modal-close:hover { color: var(--score-accent); }
.modal-preview {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  font-size: 14px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  line-height: 1.8;
  color: var(--score-body);
  white-space: pre-wrap;
  word-break: break-all;
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--score-border);
}

/* ── Reference Lyrics Panel ── */
.ref-panel {
  background: var(--score-card);
  border-radius: 8px;
  box-shadow: var(--score-shadow);
  overflow: hidden;
  border: 1px solid var(--score-border);
}
.ref-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  font-family: var(--font-main);
  font-weight: 500;
  color: var(--score-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.2s;
}
.ref-toggle:hover { color: var(--score-body); }
.ref-chevron {
  margin-left: auto;
  transition: transform 0.2s;
}
.ref-toggle.open .ref-chevron { transform: rotate(180deg); }
.ref-content {
  padding: 0 16px 16px;
}
.ref-textarea {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  font-family: var(--font-main);
  font-weight: 500;
  line-height: 1.8;
  border: 1px solid var(--score-border);
  border-radius: 8px;
  background: var(--score-paper);
  color: var(--score-body);
  resize: vertical;
  outline: none;
}
.ref-textarea:focus { border-color: var(--score-accent); }

/* 勘誤按鈕區 */
.ref-actions {
  margin-top: 8px;
  display: flex;
  gap: 8px;
}
.ref-actions .btn-action {
  font-size: 13px;
  padding: 6px 14px;
}
.ref-actions .btn-action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* 撕破紙張風格說明卡 */
.ref-desc.score-card {
  position: relative;
  margin-bottom: 12px;
  padding: 18px 20px 18px 20px;
  background: var(--score-paper-warm);
  border: none;
  border-radius: 0;
  overflow: visible;
  /* 上下撕裂邊緣 */
  --tear-size: 10px;
  clip-path: polygon(
    0% var(--tear-size),
    3% 0%, 6% var(--tear-size), 10% 2px, 14% var(--tear-size),
    18% 1px, 22% calc(var(--tear-size) - 2px), 27% 3px, 32% var(--tear-size),
    37% 1px, 42% calc(var(--tear-size) - 3px), 48% 2px, 53% var(--tear-size),
    58% 0%, 63% calc(var(--tear-size) - 1px), 68% 3px, 73% var(--tear-size),
    78% 1px, 83% calc(var(--tear-size) - 2px), 88% 2px, 93% var(--tear-size),
    97% 1px, 100% calc(var(--tear-size) - 3px),
    100% calc(100% - var(--tear-size)),
    97% 100%, 93% calc(100% - var(--tear-size)), 88% calc(100% - 2px),
    83% calc(100% - var(--tear-size)), 78% calc(100% - 1px),
    73% calc(100% - var(--tear-size) + 2px), 68% calc(100% - 3px),
    63% calc(100% - var(--tear-size)), 58% 100%,
    53% calc(100% - var(--tear-size) + 1px), 48% calc(100% - 2px),
    42% calc(100% - var(--tear-size)), 37% calc(100% - 1px),
    32% calc(100% - var(--tear-size) + 3px), 27% calc(100% - 3px),
    22% calc(100% - var(--tear-size)), 18% calc(100% - 1px),
    14% calc(100% - var(--tear-size) + 2px), 10% calc(100% - 2px),
    6% calc(100% - var(--tear-size)), 3% 100%, 0% calc(100% - var(--tear-size))
  );
  filter: drop-shadow(0 1px 3px rgba(40, 30, 35, 0.08));
}
/* 五線譜背景 */
.score-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 11px,
      var(--score-staff) 11px,
      var(--score-staff) 12px
    );
  background-size: 100% 60px;
  background-position: 0 8px;
}
/* 內容區 */
.score-body {
  position: relative;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.score-note {
  flex-shrink: 0;
  color: var(--score-accent);
  margin-top: 1px;
  opacity: 0.7;
}
.score-body p {
  font-size: 14px;
  color: var(--score-body);
  line-height: 1.6;
  margin: 0;
}
.ref-hint {
  font-size: 12px;
  color: var(--score-light);
  margin-top: 8px;
  line-height: 1.4;
  font-style: italic;
}

/* ── Footer — Composer Credit ── */
.site-footer {
  text-align: center;
  padding: 32px 16px;
  font-size: 14px;
  color: var(--score-muted);
  position: relative;
}
.site-footer::before {
  content: '';
  display: block;
  max-width: 200px;
  margin: 0 auto 16px;
  border-top: 2px solid var(--score-staff-bold);
  border-bottom: 1px solid var(--score-staff-bold);
  height: 4px;
}
.site-footer a {
  color: var(--score-accent);
  text-decoration: none;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .player-layout {
    grid-template-columns: 1fr;
  }
  .controls-panel {
    position: static;
  }
}
@media (max-width: 768px) {
  .app { padding: 16px 12px 40px; }
  .player-controls { padding: 16px; }
  .progress-wrapper { gap: 8px; }
  .volume-wrapper { display: none; }
  .lyrics-scroll { height: 350px; padding: 80px 16px; }
  .lyric-line { font-size: 1rem; padding: 8px 12px; }
  .lyric-line.active { font-size: 1.2rem; }
  .action-bar { gap: 6px; }
  .btn-action { padding: 6px 12px; font-size: 12px; }
  .edit-row { flex-wrap: wrap; }
  .edit-time { width: 70px; }
  .app-title h1 { font-size: 20px; }
  .title-icon { width: 24px; height: 24px; }
  .app-title::before,
  .app-title::after { max-width: 200px; }
  .lyrics-container::before,
  .lyrics-container::after { display: none; }
}