/* ===== 背景音乐播放器 — 右下角悬浮毛玻璃（暗色官网适配版）===== */

.music-player {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 10px;
  border-radius: 100px;
  background: rgba(5, 8, 13, 0.75);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid rgba(194, 147, 61, 0.15);
  box-shadow:
    0 4px 24px rgba(35, 161, 147, 0.08),
    0 2px 8px rgba(107, 59, 199, 0.06),
    0 0 0 1px rgba(255, 255, 255, 0.06) inset;
  transition: all 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  width: 48px;
  height: 48px;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  cursor: pointer;
}

.music-player::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    135deg,
    rgba(35, 161, 147, 0.2),
    rgba(107, 59, 199, 0.12),
    rgba(194, 147, 61, 0.08),
    rgba(35, 161, 147, 0.2)
  );
  background-size: 400% 400%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: musicBorderGlow 5s ease-in-out infinite;
  pointer-events: none;
  opacity: 0.5;
  z-index: -1;
}

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

.music-player:hover,
.music-player--expanded {
  width: 340px;
  height: auto;
  padding: 12px 16px;
  gap: 12px;
  border-radius: 28px;
  cursor: default;
}

.music-player__trigger {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--violet));
  border: none;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 2px 12px rgba(35, 161, 147, 0.3);
  flex-shrink: 0;
}

.music-player:hover .music-player__trigger,
.music-player--expanded .music-player__trigger {
  display: none;
}

.music-player__trigger svg {
  width: 14px;
  height: 14px;
  color: #fff;
}

.music-player--playing .music-player__trigger {
  animation: musicPulse 1.6s ease-in-out infinite;
}

@keyframes musicPulse {
  0%, 100% { box-shadow: 0 2px 12px rgba(35, 161, 147, 0.3); }
  50% { box-shadow: 0 4px 24px rgba(35, 161, 147, 0.5), 0 0 32px rgba(107, 59, 199, 0.2); }
}

.music-player__body {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 10px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  min-width: 0;
}

.music-player:hover .music-player__body,
.music-player--expanded .music-player__body {
  opacity: 1;
  visibility: visible;
  transition-delay: 0.15s;
}

.music-player__play {
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(194, 147, 61, 0.2);
  background: rgba(10, 14, 22, 0.6);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  color: var(--teal);
  padding: 0;
}

.music-player__play:hover {
  background: rgba(35, 161, 147, 0.10);
  border-color: rgba(35, 161, 147, 0.35);
}

.music-player__play svg {
  width: 14px;
  height: 14px;
}

.music-player__play .play-icon { display: block; }
.music-player__play .pause-icon { display: none; }
.music-player--playing .music-player__play .play-icon { display: none; }
.music-player--playing .music-player__play .pause-icon { display: block; }

.music-player__progress-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.music-player__title {
  font-size: 11px;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.02em;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.music-player__progress-bar {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: rgba(194, 147, 61, 0.08);
  cursor: pointer;
  position: relative;
  overflow: visible;
}

.music-player__progress-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--teal), var(--violet));
  transition: width 0.15s linear;
  position: relative;
}

.music-player__progress-fill::after {
  content: '';
  position: absolute;
  right: -4px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.music-player__progress-bar:hover .music-player__progress-fill::after {
  opacity: 1;
}

.music-player__time {
  display: flex;
  justify-content: space-between;
  font-family: "Courier New", monospace;
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.music-player__volume {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.music-player__volume-btn {
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
  padding: 0;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.music-player__volume-btn:hover {
  opacity: 1;
}

.music-player__volume-btn svg {
  width: 14px;
  height: 14px;
}

.music-player__volume-btn .vol-on-icon { display: block; }
.music-player__volume-btn .vol-off-icon { display: none; }
.music-player--muted .music-player__volume-btn .vol-on-icon { display: none; }
.music-player--muted .music-player__volume-btn .vol-off-icon { display: block; }

.music-player__volume-slider {
  width: 60px;
  height: 3px;
  border-radius: 2px;
  background: rgba(194, 147, 61, 0.10);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  outline: none;
}

.music-player__volume-slider::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--teal);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(35, 161, 147, 0.3);
}

.music-player__volume-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--teal);
  cursor: pointer;
  border: none;
  box-shadow: 0 1px 4px rgba(35, 161, 147, 0.3);
}

.music-player--loading .music-player__trigger {
  opacity: 0.6;
}

.music-player--error .music-player__trigger {
  background: rgba(236, 72, 153, 0.3);
}

.music-player__error-tip {
  font-size: 10px;
  color: #ec4899;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: none;
}

.music-player--error .music-player__error-tip {
  display: inline;
}

@media (max-width: 720px) {
  .music-player {
    right: 12px;
    bottom: 12px;
  }

  .music-player:hover,
  .music-player--expanded {
    width: calc(100vw - 24px);
    max-width: 340px;
    border-radius: 24px;
  }

  .music-player__volume-slider {
    width: 40px;
  }
}