/* ========== 主题变量 ========== */
:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: rgba(255,255,255,0.08);
  --text-primary: #eaeaea;
  --text-secondary: #aaa;
  --accent: #e94560;
  --accent-glow: rgba(233,69,96,0.4);
  --progress-bg: rgba(255,255,255,0.15);
  --lyric-active: #e94560;
  --disk-color: #e94560;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --glass: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --eq-bg: rgba(0,0,0,0.5);
  --danger: #ff5252;
  --success: #4caf50;
  --warning: #ff9800;
}

[data-theme="dreamy"] {
  --bg-primary: #1b0a2e;
  --bg-secondary: #2d1057;
  --bg-card: rgba(255,255,255,0.07);
  --text-primary: #f0e6ff;
  --text-secondary: #c9b8e0;
  --accent: #c77dff;
  --accent-glow: rgba(199,125,255,0.45);
  --progress-bg: rgba(255,255,255,0.12);
  --lyric-active: #e0aaff;
  --disk-color: #c77dff;
  --shadow: 0 8px 32px rgba(100,30,150,0.35);
  --gradient: linear-gradient(135deg, #1b0a2e 0%, #2d1057 50%, #1a0a3e 100%);
  --glass: rgba(255,255,255,0.05);
  --glass-border: rgba(199,125,255,0.18);
}

[data-theme="forest"] {
  --bg-primary: #0d1b0d;
  --bg-secondary: #1a2e1a;
  --bg-card: rgba(255,255,255,0.06);
  --text-primary: #e8f5e9;
  --text-secondary: #a5d6a7;
  --accent: #4caf50;
  --accent-glow: rgba(76,175,80,0.4);
  --progress-bg: rgba(255,255,255,0.12);
  --lyric-active: #81c784;
  --disk-color: #4caf50;
  --shadow: 0 8px 32px rgba(30,100,30,0.35);
  --gradient: linear-gradient(135deg, #0d1b0d 0%, #1a2e1a 100%);
  --glass: rgba(255,255,255,0.05);
  --glass-border: rgba(76,175,80,0.18);
}

[data-theme="ocean"] {
  --bg-primary: #0a1628;
  --bg-secondary: #0f2847;
  --bg-card: rgba(255,255,255,0.06);
  --text-primary: #e3f2fd;
  --text-secondary: #90caf9;
  --accent: #42a5f5;
  --accent-glow: rgba(66,165,245,0.4);
  --progress-bg: rgba(255,255,255,0.12);
  --lyric-active: #64b5f6;
  --disk-color: #42a5f5;
  --shadow: 0 8px 32px rgba(20,80,160,0.35);
  --gradient: linear-gradient(135deg, #0a1628 0%, #0f2847 50%, #162e50 100%);
  --glass: rgba(255,255,255,0.05);
  --glass-border: rgba(66,165,245,0.18);
}

[data-theme="sunset"] {
  --bg-primary: #1c0a00;
  --bg-secondary: #2e1500;
  --bg-card: rgba(255,255,255,0.06);
  --text-primary: #fff3e0;
  --text-secondary: #ffcc80;
  --accent: #ff7043;
  --accent-glow: rgba(255,112,67,0.4);
  --progress-bg: rgba(255,255,255,0.12);
  --lyric-active: #ff8a65;
  --disk-color: #ff7043;
  --shadow: 0 8px 32px rgba(180,60,0,0.35);
  --gradient: linear-gradient(135deg, #1c0a00 0%, #2e1500 50%, #3e1f00 100%);
  --glass: rgba(255,255,255,0.05);
  --glass-border: rgba(255,112,67,0.18);
}

[data-theme="aurora"] {
  --bg-primary: #0d1b2a;
  --bg-secondary: #1b2838;
  --bg-card: rgba(255,255,255,0.06);
  --text-primary: #e0e1dd;
  --text-secondary: #778da9;
  --accent: #00b4d8;
  --accent-glow: rgba(0,180,216,0.4);
  --progress-bg: rgba(255,255,255,0.12);
  --lyric-active: #90e0ef;
  --disk-color: #00b4d8;
  --shadow: 0 8px 32px rgba(0,100,160,0.35);
  --gradient: linear-gradient(135deg, #0d1b2a 0%, #1b2838 50%, #0d1b2a 100%);
  --glass: rgba(255,255,255,0.05);
  --glass-border: rgba(0,180,216,0.18);
}

/* ========== 全局重置 ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--gradient);
  background-size: 200% 200%;
  animation: bgShift 20s ease infinite;
  color: var(--text-primary);
  transition: background 0.8s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@keyframes bgShift {
  0%,100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

#particles {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

/* ========== 主布局 ========== */
.player-container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: row;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* ========== 左侧面板 ========== */
.left-panel {
  flex: 0 0 50%;
  width: 50%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(12px, 3vh, 30px);
  position: relative;
  overflow: hidden;
}

/* ========== 主题切换器 ========== */
.theme-switcher {
  position: absolute;
  top: clamp(10px, 2vh, 24px);
  left: clamp(10px, 2vw, 24px);
  display: flex;
  align-items: center;
  gap: clamp(6px, 1vw, 10px);
  z-index: 50;
  flex-wrap: nowrap;
}

.theme-trigger {
  width: clamp(28px, 3vw, 36px);
  height: clamp(28px, 3vw, 36px);
  border-radius: 50%;
  border: 2px solid var(--glass-border);
  background: var(--glass);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(14px, 1.5vw, 18px);
  color: var(--text-primary);
  transition: all 0.3s;
  flex-shrink: 0;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.theme-trigger:hover, .theme-trigger:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: scale(1.08);
  outline: none;
}

.theme-panel {
  display: flex;
  gap: clamp(5px, 0.8vw, 8px);
  align-items: center;
  overflow: hidden;
  max-width: 0;
  opacity: 0;
  transition: max-width 0.45s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.35s ease,
              margin-left 0.45s ease;
  margin-left: 0;
  flex-shrink: 1;
}

.theme-panel.open {
  max-width: 400px;
  opacity: 1;
  margin-left: clamp(4px, 0.5vw, 8px);
}

.theme-panel label {
  font-size: clamp(11px, 1.2vw, 13px);
  color: var(--text-secondary);
  margin-right: 2px;
  white-space: nowrap;
  flex-shrink: 0;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.3s ease 0.15s, transform 0.3s ease 0.15s;
}

.theme-panel.open label {
  opacity: 1;
  transform: translateX(0);
}

.theme-btn {
  width: clamp(20px, 2.2vw, 28px);
  height: clamp(20px, 2.2vw, 28px);
  border-radius: 50%;
  border: 2px solid var(--glass-border);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 0.3s ease, transform 0.3s ease, border-color 0.3s, box-shadow 0.3s;
}

.theme-panel.open .theme-btn {
  opacity: 1;
  transform: scale(1);
}

.theme-panel.open .theme-btn:nth-child(1) { transition-delay: 0.05s; }
.theme-panel.open .theme-btn:nth-child(2) { transition-delay: 0.10s; }
.theme-panel.open .theme-btn:nth-child(3) { transition-delay: 0.15s; }
.theme-panel.open .theme-btn:nth-child(4) { transition-delay: 0.20s; }
.theme-panel.open .theme-btn:nth-child(5) { transition-delay: 0.25s; }
.theme-panel.open .theme-btn:nth-child(6) { transition-delay: 0.30s; }
.theme-panel.open .theme-btn:nth-child(7) { transition-delay: 0.35s; }

.theme-btn:hover, .theme-btn:focus-visible { transform: scale(1.18); border-color: var(--accent); outline: none; }
.theme-btn.active { border-color: var(--accent); box-shadow: 0 0 10px var(--accent-glow); }

.theme-btn[data-theme="dark"] { background: linear-gradient(135deg, #1a1a2e, #e94560); }
.theme-btn[data-theme="dreamy"] { background: linear-gradient(135deg, #1b0a2e, #c77dff); }
.theme-btn[data-theme="forest"] { background: linear-gradient(135deg, #0d1b0d, #4caf50); }
.theme-btn[data-theme="ocean"] { background: linear-gradient(135deg, #0a1628, #42a5f5); }
.theme-btn[data-theme="sunset"] { background: linear-gradient(135deg, #1c0a00, #ff7043); }
.theme-btn[data-theme="aurora"] { background: linear-gradient(135deg, #0d1b2a, #00b4d8); }

.theme-progress-bar {
  position: absolute;
  bottom: -3px;
  left: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  width: 0%;
  transition: width 0.1s linear;
  box-shadow: 0 0 6px var(--accent-glow);
}

/* ========== 文件上传区 ========== */
.file-upload-area {
  position: absolute;
  top: clamp(10px, 2vh, 24px);
  right: clamp(10px, 2vw, 24px);
  display: flex;
  gap: clamp(6px, 1vw, 10px);
  z-index: 10;
  flex-wrap: wrap;
}

.upload-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: clamp(5px, 1vh, 8px) clamp(10px, 1.5vw, 16px);
  border-radius: 20px;
  font-size: clamp(11px, 1.2vw, 13px);
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.upload-btn:hover, .upload-btn:focus-within {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 15px var(--accent-glow);
}

.upload-btn input { display: none; }

/* 上传进度 */
.upload-progress {
  display: none;
  align-items: center;
  gap: 8px;
  font-size: clamp(10px, 1.1vw, 12px);
  color: var(--text-secondary);
  margin-top: 4px;
}

.upload-progress.show { display: flex; }

.upload-progress-bar {
  width: 80px;
  height: 3px;
  background: var(--progress-bg);
  border-radius: 2px;
  overflow: hidden;
}

.upload-progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.2s;
}

/* 黑胶唱片 */
.vinyl-container {
  position: relative;
  /* 自适应：在左面板宽度和视口高度之间取较小者，留出安全边距 */
  width: min(clamp(140px, 35vh, 340px), clamp(140px, 45vw, 340px));
  height: min(clamp(140px, 35vh, 340px), clamp(140px, 45vw, 340px));
  aspect-ratio: 1 / 1;
  margin-bottom: clamp(12px, 3vh, 32px);
  flex-shrink: 0;
  container-type: size;
}

/* 唱片内部元素跟随容器尺寸自适应 */
.vinyl-record {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at center, #333 0%, #111 30%, #000 70%);
  position: relative;
  animation: spin 20s linear infinite;
  animation-play-state: paused;
  box-shadow: 0 0 clamp(12px, 3vh, 36px) rgba(0,0,0,0.6),
              inset 0 0 clamp(6px, 1.5vh, 18px) rgba(255,255,255,0.05);
}

.vinyl-record.playing { animation-play-state: running; }

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

/* 唱片标签尺寸随容器自适应 */
.vinyl-label {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 35cqw; height: 35cqh;
  max-width: 35%; max-height: 35%;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
  z-index: 2;
}

.vinyl-label::after {
  content: '';
  width: 20cqmin; height: 20cqmin;
  max-width: 20%; max-height: 20%;
  border-radius: 50%;
  background: #000;
}

.vinyl-label .music-note {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(12px, 6cqw, 28px);
  color: rgba(255,255,255,0.9);
  z-index: 3;
}

/* 唱片盘面 — 尺寸由 .vinyl-container 的 cqw/cqh 驱动 */
.vinyl-record {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at center, #333 0%, #111 30%, #000 70%);
  position: relative;
  animation: spin 20s linear infinite;
  animation-play-state: paused;
  box-shadow: 0 0 clamp(12px, 3vh, 36px) rgba(0,0,0,0.6),
              inset 0 0 clamp(6px, 1.5vh, 18px) rgba(255,255,255,0.05);
}

.vinyl-record.playing { animation-play-state: running; }

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

/* 同心圆纹理 */
.vinyl-record::before {
  content: '';
  position: absolute;
  top: 3%; left: 3%; right: 3%; bottom: 3%;
  border-radius: 50%;
  background: repeating-radial-gradient(
    circle at center,
    transparent 0px, transparent 2px,
    rgba(255,255,255,0.03) 2px, rgba(255,255,255,0.03) 4px
  );
}

/* 唱片光泽 */
.vinyl-record::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg,
    transparent 0%, rgba(255,255,255,0.06) 15%,
    transparent 30%, transparent 50%,
    rgba(255,255,255,0.04) 65%, transparent 80%);
}

/* 中心标签 */
.vinyl-label {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 35cqmin; height: 35cqmin;
  max-width: 35%; max-height: 35%;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
  z-index: 2;
}

.vinyl-label::after {
  content: '';
  width: 20cqmin; height: 20cqmin;
  max-width: 20%; max-height: 20%;
  border-radius: 50%;
  background: #000;
}

.vinyl-label .music-note {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(12px, 7cqmin, 28px);
  color: rgba(255,255,255,0.9);
  z-index: 3;
}

/* 歌曲信息 */
.song-info-left {
  text-align: center;
  margin-bottom: clamp(10px, 2.5vh, 20px);
  width: 100%;
  max-width: 420px;
  padding: 0 10px;
  flex-shrink: 0;
}

.song-title-main {
  font-size: clamp(16px, 2.5vw, 24px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: 1px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  word-break: break-all;
}

.song-artist-main {
  font-size: clamp(12px, 1.5vw, 15px);
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 进度条 */
.progress-section {
  width: 100%;
  max-width: clamp(280px, 40vw, 420px);
  margin-bottom: clamp(10px, 2.5vh, 20px);
  flex-shrink: 0;
}

.progress-bar-container {
  width: 100%;
  height: clamp(16px, 3vh, 24px); /* taller for easier touch */
  background: transparent;
  cursor: pointer;
  position: relative;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  touch-action: none; /* prevent scroll while dragging */
}

.progress-bar-track {
  width: 100%;
  height: clamp(4px, 0.8vh, 6px);
  background: var(--progress-bg);
  border-radius: 3px;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--lyric-active));
  border-radius: 3px;
  width: 0%;
  transition: width 0.05s linear;
  position: relative;
  pointer-events: none;
}

.progress-bar-thumb {
  position: absolute;
  top: 50%;
  width: clamp(12px, 2vh, 16px);
  height: clamp(12px, 2vh, 16px);
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-glow);
  transform: translate(-50%, -50%);
  left: 0%;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}

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

.time-display {
  display: flex;
  justify-content: space-between;
  font-size: clamp(10px, 1.2vw, 12px);
  color: var(--text-secondary);
}

/* 控制按钮 */
.controls-main {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.5vw, 24px);
  flex-shrink: 0;
}

.ctrl-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: clamp(6px, 1.2vh, 10px);
  border-radius: 50%;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ctrl-btn:hover, .ctrl-btn:focus-visible {
  background: var(--glass);
  color: var(--accent);
  transform: scale(1.1);
  outline: none;
}

.ctrl-btn svg { width: clamp(16px, 2vw, 22px); height: clamp(16px, 2vw, 22px); fill: currentColor; }

.play-btn-main {
  width: clamp(48px, 6vh, 64px);
  height: clamp(48px, 6vh, 64px);
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  transition: all 0.3s;
  box-shadow: 0 4px 20px var(--accent-glow);
  flex-shrink: 0;
}

.play-btn-main:hover, .play-btn-main:focus-visible {
  transform: scale(1.08);
  box-shadow: 0 6px 30px var(--accent-glow);
  outline: none;
}

.play-btn-main svg { width: clamp(20px, 2.5vw, 28px); height: clamp(20px, 2.5vw, 28px); fill: #fff; }

/* 倍速控制 */
.speed-control {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: clamp(4px, 1vh, 8px);
  flex-shrink: 0;
}

.speed-label {
  font-size: clamp(10px, 1.1vw, 12px);
  color: var(--text-secondary);
}

.speed-select {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: clamp(10px, 1.1vw, 12px);
  cursor: pointer;
  outline: none;
}

.speed-select:focus { border-color: var(--accent); }

/* 音量控制 */
.volume-control {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: clamp(8px, 2vh, 16px);
  flex-shrink: 0;
}

.volume-control svg { width: clamp(14px, 1.5vw, 18px); height: clamp(14px, 1.5vw, 18px); fill: var(--text-secondary); flex-shrink: 0; }

.volume-slider {
  width: clamp(60px, 10vw, 100px);
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--progress-bg);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: clamp(10px, 1.2vw, 12px);
  height: clamp(10px, 1.2vw, 12px);
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.volume-slider::-moz-range-thumb {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

/* 播放模式指示 */
.mode-indicator {
  font-size: clamp(10px, 1.1vw, 11px);
  color: var(--text-secondary);
  margin-top: clamp(4px, 1vh, 8px);
  text-align: center;
  min-height: 1em;
  flex-shrink: 0;
}

/* 全屏按钮激活态 */
#fullscreenBtn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* 均衡器按钮 */
.eq-btn {
  margin-top: clamp(6px, 1.5vh, 12px);
  opacity: 0.6;
}

.eq-btn:hover { opacity: 1; }

/* 全屏状态 */
:fullscreen .player-container,
:-webkit-full-screen .player-container {
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
}

:fullscreen .vinyl-container,
:-webkit-full-screen .vinyl-container {
  width: min(clamp(220px, 42vh, 420px), clamp(220px, 48vw, 420px));
  height: min(clamp(220px, 42vh, 420px), clamp(220px, 48vw, 420px));
}

:fullscreen .song-title-main,
:-webkit-full-screen .song-title-main { font-size: clamp(20px, 3vw, 32px); }

:fullscreen .song-artist-main,
:-webkit-full-screen .song-artist-main { font-size: clamp(14px, 1.8vw, 18px); }

:fullscreen .play-btn-main,
:-webkit-full-screen .play-btn-main { width: clamp(56px, 7vh, 72px); height: clamp(56px, 7vh, 72px); }

:fullscreen .play-btn-main svg,
:-webkit-full-screen .play-btn-main svg { width: clamp(24px, 3vw, 32px); height: clamp(24px, 3vw, 32px); }

:fullscreen .ctrl-btn svg,
:-webkit-full-screen .ctrl-btn svg { width: clamp(20px, 2.2vw, 26px); height: clamp(20px, 2.2vw, 26px); }

:fullscreen .lyric-line,
:-webkit-full-screen .lyric-line { font-size: clamp(16px, 1.8vw, 20px); padding: clamp(8px, 1.5vh, 12px) 0; }

:fullscreen .lyric-line.active,
:-webkit-full-screen .lyric-line.active { font-size: clamp(18px, 2.2vw, 24px); }

:fullscreen .volume-slider,
:-webkit-full-screen .volume-slider { width: clamp(80px, 12vw, 120px); }

/* 全屏退出提示 */
.fullscreen-hint {
  position: fixed;
  bottom: max(16px, env(safe-area-inset-bottom, 16px));
  right: 16px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 20px;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.fullscreen-hint.show { opacity: 1; }

/* ========== 右侧面板 ========== */
.right-panel {
  flex: 0 0 50%;
  width: 50%;
  min-width: 0;
  background: var(--glass);
  border-left: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: all 0.5s;
}

.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--glass-border);
  padding: 0 clamp(10px, 1.5vw, 20px);
  flex-shrink: 0;
  align-items: center;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: clamp(10px, 1.8vh, 16px) clamp(12px, 2vw, 20px);
  font-size: clamp(12px, 1.3vw, 14px);
  cursor: pointer;
  position: relative;
  transition: color 0.3s;
  white-space: nowrap;
}

.tab-btn:hover, .tab-btn:focus-visible { color: var(--text-primary); outline: none; }
.tab-btn.active { color: var(--accent); }
.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0; left: 20%;
  width: 60%; height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.tab-actions { margin-left: auto; display: flex; align-items: center; gap: 6px; }

.hide-lyrics-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: clamp(10px, 1.1vw, 12px);
  cursor: pointer;
  transition: all 0.3s;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 4px;
}

.hide-lyrics-btn:hover, .hide-lyrics-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 10px var(--accent-glow);
}

/* 歌词偏移控制条 */
.lyric-offset-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px clamp(10px, 1.5vw, 16px);
  border-bottom: 1px solid var(--glass-border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.offset-label {
  font-size: clamp(10px, 1.1vw, 12px);
  color: var(--text-secondary);
  white-space: nowrap;
}

.offset-value {
  font-size: clamp(10px, 1.1vw, 12px);
  color: var(--accent);
  font-weight: 600;
  min-width: 40px;
  text-align: center;
}

.offset-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: clamp(9px, 1vw, 11px);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.offset-btn:hover, .offset-btn:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  outline: none;
}

.offset-btn.export-btn { border-color: rgba(76,175,80,0.4); }
.offset-btn.export-btn:hover { background: var(--success); border-color: var(--success); }

/* 歌词区域 */
.lyrics-container {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
  padding: 0;
  display: flex;
  flex-direction: column;
  transition: opacity 0.4s, transform 0.4s;
}

.lyrics-container.hidden {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  flex: 0 0 0 !important;
  min-height: 0 !important;
}

.lyrics-scroll {
  flex: 1;
  height: 100%;
  overflow-y: auto;
  scroll-behavior: smooth;
  padding: 40% 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
  -webkit-overflow-scrolling: touch;
}

.lyrics-scroll::-webkit-scrollbar { width: 4px; }
.lyrics-scroll::-webkit-scrollbar-track { background: transparent; }
.lyrics-scroll::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

.lyric-line {
  padding: clamp(6px, 1.2vh, 10px) 0;
  font-size: clamp(14px, 1.6vw, 17px);
  color: var(--text-secondary);
  text-align: center;
  transition: all 0.4s ease;
  line-height: 1.8;
  opacity: 0.5;
  transform: scale(0.95);
  word-break: break-word;
  overflow-wrap: break-word;
  cursor: pointer;
  border-radius: 6px;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.lyric-line:hover { background: var(--glass); opacity: 0.8; }

.lyric-line.active {
  color: var(--lyric-active);
  font-size: clamp(16px, 1.8vw, 20px);
  font-weight: 700;
  opacity: 1;
  transform: scale(1);
  text-shadow: 0 0 20px var(--accent-glow);
}

.lyric-line.passed { opacity: 0.35; }

.lyrics-hidden-placeholder {
  display: none;
  flex: 1;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: var(--text-secondary);
  font-size: clamp(12px, 1.3vw, 14px);
  gap: 8px;
  text-align: center;
  padding: 20px;
}

.lyrics-hidden-placeholder.show { display: flex; }
.lyrics-hidden-placeholder svg { width: 36px; height: 36px; opacity: 0.3; fill: currentColor; }

/* 歌曲信息 Tab */
.info-container {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: clamp(14px, 2.5vh, 24px);
  display: none;
  -webkit-overflow-scrolling: touch;
}

.info-container.active { display: block; }
.info-container::-webkit-scrollbar { width: 4px; }
.info-container::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

.info-section { margin-bottom: clamp(16px, 3vh, 24px); }

.info-section h3 {
  font-size: clamp(11px, 1.2vw, 13px);
  color: var(--text-secondary);
  margin-bottom: clamp(6px, 1.5vh, 10px);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: clamp(6px, 1.2vh, 10px) 0;
  border-bottom: 1px solid var(--glass-border);
  font-size: clamp(12px, 1.3vw, 14px);
  gap: 10px;
}

.info-item .label { color: var(--text-secondary); flex-shrink: 0; }
.info-item .value { color: var(--text-primary); font-weight: 500; text-align: right; word-break: break-word; overflow-wrap: break-word; }

/* 播放列表 */
.playlist-container {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: clamp(10px, 2vh, 16px);
  display: none;
  -webkit-overflow-scrolling: touch;
}

.playlist-container.active { display: block; }
.playlist-container::-webkit-scrollbar { width: 4px; }
.playlist-container::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

.playlist-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 4px 8px;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 8px;
  flex-shrink: 0;
}

.playlist-count {
  font-size: clamp(11px, 1.2vw, 13px);
  color: var(--text-secondary);
}

.playlist-action-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 3px 10px;
  border-radius: 10px;
  font-size: clamp(10px, 1.1vw, 12px);
  cursor: pointer;
  transition: all 0.2s;
  margin-left: auto;
}

.playlist-action-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.playlist-action-btn + .playlist-action-btn { margin-left: 6px; }

.playlist-virtual-list { position: relative; }

.playlist-item {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.5vw, 12px);
  padding: clamp(8px, 1.5vh, 12px);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s;
  margin-bottom: 4px;
  min-width: 0;
  position: relative;
  touch-action: manipulation;
}

.playlist-item:hover { background: var(--glass); }
.playlist-item.active { background: var(--glass); border: 1px solid var(--glass-border); }
.playlist-item.dragging { opacity: 0.5; border: 1px dashed var(--accent); }
.playlist-item.drag-over { border-top: 2px solid var(--accent); }

.playlist-item .item-cover {
  width: clamp(32px, 4vh, 42px);
  height: clamp(32px, 4vh, 42px);
  border-radius: 8px;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: clamp(14px, 1.5vw, 18px);
  position: relative;
}

.playlist-item .item-cover .drag-handle {
  position: absolute;
  top: -4px; left: -4px;
  width: 14px; height: 14px;
  background: var(--accent);
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 8px;
  cursor: grab;
  opacity: 0.8;
}

.playlist-item:hover .drag-handle { display: flex; }

.playlist-item .item-info { flex: 1; min-width: 0; }
.playlist-item .item-title {
  font-size: clamp(12px, 1.3vw, 14px);
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.playlist-item .item-artist {
  font-size: clamp(10px, 1.1vw, 12px);
  color: var(--text-secondary);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.playlist-item.active .item-title { color: var(--accent); }

.playlist-item .item-delete {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  border-radius: 50%;
  opacity: 0;
  transition: all 0.2s;
  flex-shrink: 0;
  font-size: 14px;
}

.playlist-item:hover .item-delete { opacity: 1; }
.playlist-item .item-delete:hover { background: var(--danger); color: #fff; }

/* 字幕区域 */
.subtitle-overlay {
  position: fixed;
  bottom: clamp(20px, 5vh, 80px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
  max-width: 90vw;
  padding: 0 16px;
}

.subtitle-overlay.show { opacity: 1; }

.subtitle-text {
  font-size: clamp(14px, 2vw, 20px);
  color: #fff;
  text-shadow: 0 2px 12px rgba(0,0,0,0.8), 0 0 20px var(--accent-glow);
  background: rgba(0,0,0,0.4);
  padding: clamp(5px, 1vh, 8px) clamp(14px, 2.5vw, 24px);
  border-radius: 8px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: inline-block;
  word-break: break-word;
  overflow-wrap: break-word;
  max-width: 100%;
}

/* 空状态 */
.empty-lyrics {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 120px;
  color: var(--text-secondary);
  font-size: clamp(12px, 1.3vw, 14px);
  gap: clamp(6px, 1.5vh, 12px);
  text-align: center;
  padding: 20px;
}

.empty-lyrics svg { width: clamp(32px, 5vh, 48px); height: clamp(32px, 5vh, 48px); opacity: 0.3; fill: currentColor; flex-shrink: 0; }
.empty-lyrics span { word-break: break-word; }

/* 通知 */
.notification {
  position: fixed;
  top: max(10px, env(safe-area-inset-top, 10px));
  left: 50%;
  transform: translateX(-50%) translateY(-80px);
  background: var(--accent);
  color: #fff;
  padding: clamp(8px, 1.5vh, 12px) clamp(18px, 3vw, 28px);
  border-radius: 10px;
  font-size: clamp(12px, 1.3vw, 14px);
  z-index: 1000;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 20px var(--accent-glow);
  max-width: 90vw;
  text-align: center;
  word-break: break-word;
}

.notification.show { transform: translateX(-50%) translateY(0); }
.notification.error { background: var(--danger); }
.notification.success { background: var(--success); }

/* ========== 均衡器面板 ========== */
.eq-panel {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 20px;
  z-index: 2000;
  display: none;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 16px 64px rgba(0,0,0,0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  min-width: 320px;
  max-width: 90vw;
}

.eq-panel.open {
  display: flex;
  animation: eqPop 0.3s ease forwards;
}

@keyframes eqPop {
  to { transform: translate(-50%, -50%) scale(1); }
}

.eq-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.eq-header h3 { font-size: 16px; color: var(--text-primary); }

.eq-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 50%;
  transition: all 0.2s;
}

.eq-close:hover { background: var(--glass); color: var(--accent); }

.eq-bands {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  height: 140px;
  padding: 10px;
  background: var(--eq-bg);
  border-radius: 10px;
}

.eq-band {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 1;
}

.eq-band-slider {
  -webkit-appearance: slider-vertical;
  appearance: slider-vertical;
  writing-mode: bt-lr;
  width: 30px;
  height: 100px;
  background: var(--progress-bg);
  border-radius: 4px;
  outline: none;
}

.eq-band-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 30px;
  height: 12px;
  border-radius: 3px;
  background: var(--accent);
  cursor: grab;
}

.eq-band-label {
  font-size: 10px;
  color: var(--text-secondary);
}

.eq-presets {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.eq-preset-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.eq-preset-btn:hover, .eq-preset-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* 前置放大器 */
.preamp-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
  background: var(--eq-bg, rgba(0,0,0,0.5));
  border-radius: 10px;
  border: 1px solid var(--glass-border);
}

.preamp-label {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preamp-value {
  font-size: 13px;
  color: var(--accent);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 4.5em;
  text-align: right;
}

.preamp-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(
    to right,
    var(--danger, #ff5252) 0%,
    var(--progress-bg) 50%,
    var(--accent) 100%
  );
  outline: none;
  cursor: pointer;
}

.preamp-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  cursor: grab;
  box-shadow: 0 0 6px var(--accent-glow);
}

.preamp-slider::-webkit-slider-thumb:active { cursor: grabbing; }

.preamp-slider::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  cursor: grab;
}

.preamp-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-secondary);
  opacity: 0.7;
  padding: 0 2px;
}

.preamp-ticks span { font-variant-numeric: tabular-nums; }

.eq-toggle-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.eq-toggle {
  font-size: 13px;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.eq-toggle input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

/* ========== 音频可视化面板 ========== */
.visualizer-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 50%;
  height: clamp(60px, 10vh, 100px);
  pointer-events: none;
  z-index: 5;
  opacity: 0.7;
}

.visualizer-panel canvas {
  width: 100%;
  height: 100%;
}

/* ========== 响应式 ========== */
@media (min-width: 1600px) {
  .left-panel { padding: 40px; }
  .vinyl-container { width: 380px; height: 380px; }
  .song-title-main { font-size: 28px; }
  .song-artist-main { font-size: 17px; }
}

@media (max-width: 1200px) {
  .vinyl-container { width: 260px; height: 260px; }
}

@media (max-width: 900px) {
  .player-container { flex-direction: column; overflow: hidden; height: 100vh; height: 100dvh; }
  .left-panel { flex: 0 0 50%; width: 100%; min-height: 0; padding: 50px 16px 16px; overflow: hidden; }
  .right-panel { width: 100%; flex: 0 0 50%; min-height: 0; border-left: none; border-top: 1px solid var(--glass-border); }
  .file-upload-area { top: 8px; right: 8px; }
  .upload-btn { padding: 6px 12px; font-size: 12px; }
  .vinyl-container { width: clamp(130px, 22vh, 180px); height: clamp(130px, 22vh, 180px); margin-bottom: 12px; }
  .song-info-left { margin-bottom: 8px; }
  .progress-section { margin-bottom: 8px; }
  .controls-main { gap: 14px; }
  .play-btn-main { width: 48px; height: 48px; }
  .lyrics-scroll { padding: 30% 12px; }
  .hide-lyrics-btn { padding: 3px 8px; font-size: 11px; }
  .visualizer-panel { width: 100%; }
}

@media (max-width: 600px) {
  .left-panel { flex: 0 0 50%; padding: 42px 10px 10px; }
  .right-panel { flex: 0 0 50%; }
  .vinyl-container { width: clamp(110px, 20vh, 150px); height: clamp(110px, 20vh, 150px); margin-bottom: 8px; }
  .song-info-left { margin-bottom: 6px; }
  .song-title-main { font-size: 15px; }
  .song-artist-main { font-size: 11px; }
  .progress-section { max-width: 100%; margin-bottom: 6px; }
  .controls-main { gap: 10px; }
  .play-btn-main { width: 44px; height: 44px; }
  .play-btn-main svg { width: 18px; height: 18px; }
  .ctrl-btn svg { width: 16px; height: 16px; }
  .volume-slider { width: 50px; }
  .volume-control { margin-top: 6px; }
  .tab-btn { padding: 8px 12px; font-size: 12px; }
  .lyric-line { font-size: 12px; padding: 4px 0; }
  .lyric-line.active { font-size: 14px; }
  .subtitle-overlay { bottom: 12px; }
  .subtitle-text { font-size: 13px; padding: 4px 12px; }
  .info-item { font-size: 12px; flex-direction: column; gap: 2px; }
  .info-item .value { text-align: left; }
  .playlist-item .item-cover { width: 32px; height: 32px; font-size: 13px; }
  .playlist-item .item-title { font-size: 12px; }
  .theme-trigger { width: 26px; height: 26px; font-size: 13px; }
  .hide-lyrics-btn { padding: 2px 6px; font-size: 10px; }
  .offset-btn { padding: 2px 6px; font-size: 9px; }
  .lyric-offset-bar { padding: 4px 8px; }
}

@media (max-width: 380px) {
  .left-panel { padding: 38px 8px 8px; }
  .theme-trigger { width: 22px; height: 22px; font-size: 11px; }
  .upload-btn { padding: 4px 8px; font-size: 10px; }
  .vinyl-container { width: 100px; height: 100px; }
  .controls-main { gap: 6px; }
  .play-btn-main { width: 40px; height: 40px; }
  .song-title-main { font-size: 13px; }
  .song-artist-main { font-size: 10px; }
}

@media (max-height: 500px) and (orientation: landscape) {
  .player-container { flex-direction: row; overflow: hidden; }
  .left-panel { flex: 0 0 50%; width: 50%; padding: 36px 8px 8px; }
  .right-panel { flex: 0 0 50%; width: 50%; border-left: 1px solid var(--glass-border); border-top: none; }
  .vinyl-container { width: 100px; height: 100px; margin-bottom: 6px; }
  .song-info-left { margin-bottom: 4px; }
  .progress-section { margin-bottom: 4px; }
  .volume-control { margin-top: 4px; }
  .controls-main { gap: 8px; }
  .play-btn-main { width: 36px; height: 36px; }
  .play-btn-main svg { width: 16px; height: 16px; }
  .lyrics-scroll { padding: 20% 8px; }
}

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .vinyl-record { box-shadow: 0 0 clamp(20px, 4vh, 40px) rgba(0,0,0,0.6), inset 0 0 1px rgba(255,255,255,0.1); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  body { animation: none; }
  .vinyl-record { animation: none; }
}