/* ══════════════════════════════════════
   Buttons
══════════════════════════════════════ */
.icon-btn {
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.7);
  width: 50px; height: 50px; /* 原来 38px 的约 1.3 倍 */
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  cursor: pointer;
  transition: background var(--t-fast), transform var(--t-fast);
}
.icon-btn:hover {
  background: rgba(255,255,255,0.08);
  transform: scale(1.08);
}
.icon-btn:active {
  transform: scale(0.8);
  background: rgba(255,255,255,0.15);
}
.icon-btn .hamburger {
  display: block;
  width: 22px; height: 3px;
  background: rgba(255,255,255,0.7);
  position: relative;
  border-radius: 2px;
}
.icon-btn .hamburger::before,
.icon-btn .hamburger::after {
  content: '';
  position: absolute;
  width: 22px; height: 3px;
  background: rgba(255,255,255,0.7);
  left: 0;
  border-radius: 2px;
}
.icon-btn .hamburger::before { top: -7px; }
.icon-btn .hamburger::after  { top: 7px; }

.control-btn {
  background: rgba(45, 45, 45, 0.4); /* 所有按钮增加毛玻璃灰色背景 */
  backdrop-filter: blur(6px); /* 降低高斯模糊程度 */
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  color: rgba(255,255,255,0.95);
  border-radius: 50%;
  cursor: pointer;
  transition: transform var(--t-fast), color var(--t-fast), opacity var(--t-normal);
  display: flex; align-items: center; justify-content: center;
  width: 96px; height: 96px;
  position: absolute;
  /* (scale 1.28 * translateY -45 = 整体上移57.6px) 保持与CD绝对圆心同高 */
  top: var(--cd-center-y, calc(50% - 72px)); 
  margin-top: -48px; /* 减掉自身高度一半实现极细垂直居中 */
  opacity: 0; /* 默认均不可见，鼠标靠近对应高度再显示 */
}

/* 仅当播放页面显示时，为按钮启用事件响应（避免隐藏时阻挡背后 main-view 中心区域的图层 Hover） */
#playback-view:not(.inactive) .control-btn {
  pointer-events: auto;
}

/* 左右两颗切歌按钮被发配到左右两侧安全距离（偏远一点） */
#prev-btn { left: calc(50% - 500px); margin-left: -48px; }
#next-btn { left: calc(50% + 500px); margin-left: -48px; }

.control-btn svg {
  width: 76px; /* 单独调大上一首下一首的三角形图标 */
  height: 76px;
}

.control-btn.play-pause {
  width: 120px; height: 120px; /* 直径减小为120px */
  left: 50%;
  margin-left: -60px; /* 减去半径一半居中 */
  margin-top: -60px;
}

.control-btn.play-pause svg {
  width: 88px; /* 内部播放图标调大 */
  height: 88px;
}

/* 按钮显形交由JS各个按钮独立控制，所以去掉统一的 .area-hover 控制 */
.control-btn.visible {
  opacity: 1;
}

.control-btn:hover {
  color: #fff;
  transform: scale(1.15); 
}
.control-btn:active {
  transform: scale(0.9);
  color: rgba(255,255,255,0.5);
}

.control-btn.play-pause:hover {
  transform: scale(1.05);
}
.control-btn.play-pause:active {
  transform: scale(0.95);
}

/* ══════════════════════════════════════
   Album Card (Cover Flow)
══════════════════════════════════════ */
.album-card {
  position: absolute;
  width: var(--album-size);
  height: var(--album-size);
  border-radius: 12px;
  overflow: visible;
  cursor: pointer;
  transition: transform var(--t-slow), opacity var(--t-slow), filter var(--t-slow);
  transform-style: preserve-3d;
}
.album-card .album-cover {
  width: var(--album-size);
  height: var(--album-size);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.7);
  position: relative;
  z-index: 2;
  transition: transform var(--t-normal);
}
.album-card .album-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.album-card .album-cover-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 48px;
  background: linear-gradient(135deg, #2a2a3a, #1a1a28);
}

/* CD peeking from behind album card */
.album-card .cd-peek {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: calc(var(--album-size) * 0.9);
  height: calc(var(--album-size) * 0.9);
  opacity: 0;
  transition: opacity var(--t-normal), transform var(--t-normal);
  z-index: 1;
  pointer-events: none;
}

.cd-peek-disc {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%,
    #3a3a3a 0%, #222 20%, #1a1a1a 35%, #0d0d0d 50%,
    #181818 65%, #242424 80%, #1c1c1c 100%);
  box-shadow:
    0 0 0 2px #2a2a2a,
    0 10px 30px rgba(0,0,0,0.8),
    inset 0 0 30px rgba(255,255,255,0.03);
}

.cd-peek-disc::before {
  content: '';
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(255,200,150,0.08), rgba(150,200,255,0.1),
    rgba(200,150,255,0.08), rgba(150,255,200,0.08),
    rgba(255,200,150,0.08)
  );
}

.cd-peek-label {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 75%;
  height: 75%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 0 4px #111;
  z-index: 3;
}

.cd-peek-label img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Center album hover: shift left, cd peek right */
.album-card.center.ready:hover .album-cover {
  transform: translateX(-96px);
}
.album-card.center.ready:hover .cd-peek {
  opacity: 1;
  transform: translate(-50%, -50%);
}

/* Reflection under album */
.album-card .album-reflection {
  position: absolute;
  bottom: -40px;
  left: 0;
  width: 100%;
  height: 40px;
  background: inherit;
  transform: scaleY(-1);
  opacity: 0.15;
  filter: blur(4px);
  border-radius: 0 0 12px 12px;
  pointer-events: none;
}

/* ══════════════════════════════════════
   Search Overlay
══════════════════════════════════════ */
.search-overlay {
  position: fixed;
  top: 0; left: 0; right: 0;
  padding: var(--sp-xl);
  display: flex;
  justify-content: center;
  z-index: var(--z-search);
  transform: translateY(-110%);
  transition: transform var(--t-slow);
  pointer-events: none;
}
.search-overlay.visible {
  transform: translateY(0);
  pointer-events: all;
}
.search-container {
  width: 840px; /* 原先 560px 的 1.5 倍 */
  max-width: 90vw;
  background: rgba(28,28,40,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 9999px; /* 将两端变为完全变圆 */
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
.search-container input {
  width: 100%;
  padding: 24px 30px; /* 原先 16px 20px 的 1.5 倍 */
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-text-primary);
  font-size: 24px; /* 原先 16px 的 1.5 倍 */
  letter-spacing: 0.02em;
}
.search-container input::placeholder {
  color: var(--color-text-muted);
}

/* ══════════════════════════════════════
   Settings Panel
══════════════════════════════════════ */
.settings-panel {
  position: fixed;
  top: 0; left: 0;
  width: 260px;
  height: 100%;
  background: rgba(14,14,22,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--color-border);
  z-index: var(--z-settings);
  padding: var(--sp-2xl) var(--sp-lg);
  transform: translateX(-100%);
  transition: transform var(--t-slow);
}
.settings-panel.visible {
  transform: translateX(0);
}
.settings-panel h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-xl);
}
.setting-item {
  margin-bottom: var(--sp-lg);
}
.setting-item label {
  display: block;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: var(--sp-sm);
}
.setting-item input[type="range"] {
  width: 100%;
  accent-color: var(--color-accent);
  cursor: pointer;
}
.setting-item-actions {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}
.settings-action-btn {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  background: rgba(255,255,255,0.05);
  color: var(--color-text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast);
}
.settings-action-btn:hover {
  transform: translateY(-1px);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.18);
}
.settings-action-btn:active {
  transform: translateY(0);
}

/* ══════════════════════════════════════
   Startup Overlay
══════════════════════════════════════ */
.startup-overlay {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background:
    radial-gradient(circle at top, rgba(124,143,255,0.16), transparent 42%),
    linear-gradient(180deg, rgba(10,10,18,0.92), rgba(6,6,12,0.98));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  opacity: 1;
  transition: opacity 0.28s ease;
}
.startup-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.startup-panel {
  width: min(560px, 100%);
  padding: 36px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 28px;
  background: rgba(18,18,28,0.82);
  box-shadow: 0 30px 100px rgba(0,0,0,0.45);
}
.startup-eyebrow {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.startup-title {
  margin-top: 14px;
  font-size: 34px;
  line-height: 1.1;
  font-weight: 600;
  color: var(--color-text-primary);
}
.startup-description {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}
.startup-progress {
  margin-top: 24px;
}
.startup-progress.hidden {
  display: none;
}
.startup-progress-track {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,0.08);
}
.startup-progress-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(124,143,255,0.72), rgba(171,214,255,0.92));
  transition: width 0.18s ease;
}
.startup-progress-text {
  margin-top: 10px;
  font-size: 13px;
  color: var(--color-text-secondary);
}
.startup-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}
.startup-btn {
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 13px 18px;
  font-size: 14px;
  cursor: pointer;
  transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast), opacity var(--t-fast);
}
.startup-btn.hidden {
  display: none;
}
.startup-btn:disabled {
  cursor: default;
  opacity: 0.55;
}
.startup-btn:not(:disabled):hover {
  transform: translateY(-1px);
}
.startup-btn-primary {
  background: rgba(124,143,255,0.22);
  color: var(--color-text-primary);
}
.startup-btn-primary:not(:disabled):hover {
  background: rgba(124,143,255,0.32);
  border-color: rgba(171,214,255,0.34);
}
.startup-btn-secondary {
  background: rgba(255,255,255,0.04);
  color: var(--color-text-secondary);
}
.startup-btn-secondary:not(:disabled):hover {
  background: rgba(255,255,255,0.08);
  color: var(--color-text-primary);
}
.startup-hint {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* ══════════════════════════════════════
   CD Machine (Playback View)
══════════════════════════════════════ */
.cd-machine {
  position: relative;
  width: 340px;
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(1.28) translateY(-45px); 
}

/* Static shadow for the CD to prevent it from rotating */
.cd-disc-shadow {
  position: absolute;
  width: 300px; /* 同步放大光盘阴影 */
  height: 300px;
  border-radius: 50%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.9);
  z-index: 1; /* Below the disc (2) but above the body (0) */
  pointer-events: none;
}

/* The spinning disc */
.cd-disc {
  position: relative;
  width: 300px; /* 放大 CD 的尺寸 (原 280px) */
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%,
    #3a3a3a 0%, #222 20%, #1a1a1a 35%, #0d0d0d 50%,
    #181818 65%, #242424 80%, #1c1c1c 100%);
  box-shadow:
    0 0 0 2px #2a2a2a,
    inset 0 0 30px rgba(255,255,255,0.03); /* Removed the outer rotating drop-shadow */
  cursor: grab;
  z-index: 2;
  /* No CSS transition — rotation is driven frame-by-frame by JS RAF loop */
}
.cd-disc:active { cursor: grabbing; }

/* Iridescent shine ring */
.cd-disc::before {
  content: '';
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(255,200,150,0.08), rgba(150,200,255,0.1),
    rgba(200,150,255,0.08), rgba(150,255,200,0.08),
    rgba(255,200,150,0.08)
  );
}

/* Center hole + label area */
.cd-label {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 75%; /* 再次扩大专辑封面直径 (原 60%) */
  height: 75%;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 0 4px #111;
  z-index: 3;
}
.cd-label img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.cd-label-placeholder {
  width: 100%; height: 100%;
  background: #1a1a28;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}

/* Center spindle hole */
.cd-disc::after {
  content: none;
}

/* Machine body */
.cd-machine-body {
  position: absolute;
  inset: -40px; /* 增加inset以容纳更厚的边框，保持内部空间一致 */
  background: #2a2a2a; /* 深灰色内部 */
  border: 24px solid #2b1408; /* 加厚的檀木色外框，且颜色更深更沉稳 */
  border-radius: 32px; /* 相应调整外圆角 */
  z-index: 0;
  box-shadow:
    0 20px 80px rgba(0,0,0,0.8), /* 外部环境投影稍微居中以匹配俯视 */
    inset 0 4px 20px rgba(0,0,0,0.8); /* 内部阴影，表现向下凹陷装CD的空间 */
}

.cd-machine-body::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 300px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%,
      #262626 0%,
      #1b1b1b 42%,
      #111 68%,
      #0a0a0a 100%);
  box-shadow:
    inset 0 18px 28px rgba(255,255,255,0.035),
    inset 0 -18px 30px rgba(0,0,0,0.72),
    inset 0 0 0 1px rgba(255,255,255,0.03),
    0 2px 4px rgba(0,0,0,0.28);
  z-index: 0;
}

/* ══════════════════════════════════════
   Progress Bar
══════════════════════════════════════ */
.track-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-sm);
  
  opacity: 0;
  transform: translateY(80px);
  /* 离开时（不带 .visible 时）：先淡下进度条，再淡下文字 */
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  transition-delay: 0.1s; 
}

.progress-container.visible .track-info,
.track-info.force-show {
  opacity: 1 !important;
  transform: translateY(0);
  /* 进入时：文字先淡上，进度条再紧接着淡上 */
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1);
  transition-delay: 0.05s; 
}

.track-info #current-track-name {
  font-size: 38px; /* 调整为现在的0.8倍 (原本47.5px) */
  font-weight: 500;
  color: var(--color-text-primary);
  max-width: 60%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.track-info #current-time-display {
  font-size: 13px;
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.progress-bar-wrap {
  position: relative;
  height: 28px;
  display: flex;
  align-items: center;
  cursor: pointer;
  
  transform: translateY(120px);
  opacity: 0;
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1);
  transition-delay: 0s; /* 离开时没有延迟，最先下降 */
}

.progress-container.visible .progress-bar-wrap {
  transform: translateY(0);
  opacity: 1;
  transition-delay: 0.15s; /* 进入时比.track-info稍晚，形成接力感 */
}

/* Track segments container */
#progress-bar {
  display: flex;
  width: 100%;
  height: 7.5px;
  gap: 3px;
  position: relative;
}

/* Individual track segment */
.track-segment {
  flex-shrink: 1; /* 允许压缩以抵消 gap 带来的额外宽度 */
  min-width: 2px; /* 极端情况下防止曲目太短被压缩到没 */
  height: 100%;
  position: relative;
  background: rgba(255,255,255,0.15);
  overflow: hidden;
  transition: height var(--t-fast);
}
/* Rounded ends on the outermost segments */
.track-segment:first-child {
  border-radius: 3px 0 0 3px;
}
.track-segment:last-child {
  border-radius: 0 3px 3px 0;
}
.track-segment:first-child:last-child {
  border-radius: 3px;
}

.progress-bar-wrap:hover .track-segment {
  height: 12px;
}
.track-segment .segment-fill {
  position: absolute;
  top: 0; left: 0; bottom: 0;
  background: var(--color-text-primary);
  width: 0%;
  pointer-events: none;
  /* Removed transition: width 0.1s linear; for absolute realtime dragging response */
}

/* Hover indicator line */
#progress-indicator {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%); /* Center exactly on JS injected left pos */
  width: 2px;
  height: 16px;
  background: rgba(255,255,255,0.7);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--t-fast);
}

/* Tooltip */
#progress-tooltip {
  position: absolute;
  bottom: 22px;
  opacity: 0;
  transition: opacity var(--t-fast);
  background: rgba(20,20,30,0.5); /* Semi transparent */
  backdrop-filter: blur(16px);    /* Gaussian blur background */
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px 14px; /* Slightly larger padding to match scale */
  pointer-events: none;
  transform: translateX(-50%);
  white-space: nowrap;
}
#progress-tooltip .tooltip-track-name {
  font-size: 14.5px; /* 1.2x bigger */
  font-weight: 500;
  color: var(--color-text-primary);
}
#progress-tooltip .tooltip-time {
  font-size: 13px; /* 1.2x bigger */
  color: var(--color-text-secondary);
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}

/* ══════════════════════════════════════
   Empty State
══════════════════════════════════════ */
.empty-state {
  text-align: center;
  color: var(--color-text-secondary);
  padding: var(--sp-2xl);
}
.empty-state h2 {
  font-size: 22px;
  margin-bottom: var(--sp-md);
  color: var(--color-text-primary);
}
.empty-state p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 400px;
}
.empty-state code {
  background: var(--color-surface);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 13px;
}

/* ══════════════════════════════════════
   Loading indicator
══════════════════════════════════════ */
.loading-spinner {
  width: 32px; height: 32px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}