/* ============ 基础变量 ============ */
:root {
  --accent: #ff8c42;
  --bg: #f5f5f0;
  --ink: #1a1a1a;
  --muted: #999;
  --line: #e0e0d8;
  --card-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

#app {
  width: 100%;
  max-width: 420px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ============ LED 状态条 ============ */
#led {
  width: 100%;
  text-align: center;
  font-size: 11px;
  color: var(--muted);
  padding: 6px 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

/* ============ 数据卡片 ============ */
#dashboard {
  width: 280px;
  height: 150px;
  border-radius: 16px;
  margin: 12px auto 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: background .3s, color .3s, box-shadow .3s;
  user-select: none;
}

/* 黑底橙字（默认） */
#dashboard.theme-dark {
  background: #111;
  color: var(--accent);
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
}
#dashboard.theme-dark .dash-info { color: rgba(255,255,255,0.45); }
#dashboard.theme-dark .dash-info b { color: var(--accent); }

/* LED灰底黑字 */
#dashboard.theme-led {
  background: #c4c4bc;
  color: #1a1a1a;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.3), 0 2px 4px rgba(0,0,0,0.1);
  border: 2px solid #a8a8a0;
  font-family: "Courier New", "SF Mono", "Consolas", monospace;
}
#dashboard.theme-led .dash-time {
  font-family: "Courier New", "SF Mono", "Consolas", monospace;
  font-size: 38px;
  letter-spacing: 4px;
  text-shadow: 0 0 5px rgba(0,0,0,0.2);
}
#dashboard.theme-led .dash-info { color: #333; }
#dashboard.theme-led .dash-info b { color: #000; font-weight: 700; }

/* 卡片内文字 */
.dash-time {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.dash-info {
  width: 82%;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
}
.dash-info b { font-weight: 600; }

/* ============ 曲目信息 ============ */
.track-info {
  text-align: center;
  margin-bottom: 12px;
  width: 100%;
}
.track-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 12px;
}
.track-sub {
  font-size: 12px;
  color: var(--muted);
}

/* ============ 进度条 ============ */
.progress-wrap {
  width: 100%;
  height: 3px;
  background: var(--line);
  border-radius: 2px;
  margin-bottom: 20px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
  transition: width .3s linear;
}

/* ============ 控制栏 ============ */
.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--ink);
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: color .2s, background .2s, transform .15s;
}
.icon-btn:hover {
  color: var(--accent);
  background: rgba(0,0,0,0.04);
}
.icon-btn:active { transform: scale(0.92); }

.play-btn {
  width: 52px;
  height: 52px;
  background: var(--ink);
  color: #fff;
  border-radius: 50%;
}
.play-btn:hover {
  background: var(--accent);
  color: #fff;
}

.heart.active svg {
  fill: #ff4444;
  stroke: #ff4444;
}

/* ============ 频道键盘 ============ */
.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
  max-width: 320px;
}
.key {
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 14px 4px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: all .2s;
  color: var(--ink);
}
.key small {
  font-size: 10px;
  font-weight: 400;
  color: var(--muted);
}
.key:hover { border-color: var(--accent); }
.key.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.key.active small { color: rgba(255,255,255,0.8); }
.key.locked { opacity: 0.4; cursor: not-allowed; }
.key.locked:hover { border-color: var(--line); }

/* ============ 主题色圆点 ============ */
.theme-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform .15s, border-color .15s;
  display: inline-block;
}
.theme-dot:hover { transform: scale(1.2); }
.theme-dot.active { border-color: var(--ink); transform: scale(1.15); }

/* ============ 设置弹层 ============ */
.sheet-mask {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: none;
  z-index: 100;
  align-items: flex-end;
  justify-content: center;
}
.sheet-mask.show { display: flex; }
.sheet {
  background: #fff;
  border-radius: 18px 18px 0 0;
  padding: 24px 20px calc(24px + env(safe-area-inset-bottom));
  width: 100%;
  max-width: 480px;
  animation: slideUp .25s ease-out;
}
@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}
.sheet h3 {
  margin-bottom: 16px;
  font-size: 16px;
  font-weight: 600;
}
.sheet .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 14px 0;
  font-size: 14px;
}
.sheet .row select,
.sheet .row input {
  font-size: 14px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  outline: none;
}
.sheet .row input[type="number"] { text-align: center; }

/* 底噪音量滑杆 */
.sheet .row .noise-vol {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sheet .row .noise-vol b {
  min-width: 34px;
  text-align: right;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.sheet .row input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 20px;
  padding: 0;
  border: none;
  background: transparent;
  accent-color: var(--accent);
}
.sheet .row input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: var(--line);
}
.sheet .row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 1px 3px rgba(0,0,0,.25);
  cursor: pointer;
}
.sheet .row input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: var(--line);
}
.sheet .row input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 1px 3px rgba(0,0,0,.25);
  cursor: pointer;
}

/* ============ Toast ============ */
#toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.8);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 200;
  pointer-events: none;
}

/* ============ 响应式 ============ */
@media (max-width: 380px) {
  #dashboard { width: 240px; height: 130px; }
  .dash-time { font-size: 32px; }
  .key { padding: 10px 2px; font-size: 16px; }
}