/* =====================================================
   Chill Flow — Floating Music Player Styles
   ===================================================== */

.music-player {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  font-family: var(--font-sans);
}

/* ---------- 收起态按钮 ---------- */
.music-fab {
  position: relative;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--sage);
  color: var(--cream);
  box-shadow:
    0 12px 24px -8px rgba(93, 111, 82, 0.5),
    inset 0 2px 0 rgba(255, 255, 255, 0.3),
    0 0 0 3px rgba(245, 241, 232, 0.7);
  transition: transform 0.4s var(--ease-water), box-shadow 0.4s;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
  overflow: visible;
}
.music-fab:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow:
    0 20px 32px -8px rgba(93, 111, 82, 0.55),
    inset 0 2px 0 rgba(255, 255, 255, 0.3),
    0 0 0 4px rgba(245, 241, 232, 0.8);
}
.music-fab__avatar {
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--cream);
  box-shadow: inset 0 0 0 2px var(--sage-deep);
}
.music-fab__avatar img {
  position: absolute;
  width: 160%;
  height: auto;
  left: 50%;
  top: 10%;
  transform: translateX(-50%);
}
/* 波纹 */
.music-fab__waves {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  pointer-events: none;
}
.music-fab__waves span {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--sage);
  opacity: 0;
}
.music-player.is-playing .music-fab__waves span {
  animation: wave-pulse 2.4s ease-out infinite;
}
.music-player.is-playing .music-fab__waves span:nth-child(2) { animation-delay: 0.8s; }
.music-player.is-playing .music-fab__waves span:nth-child(3) { animation-delay: 1.6s; }
@keyframes wave-pulse {
  0% { transform: scale(0.9); opacity: 0.8; }
  100% { transform: scale(1.6); opacity: 0; }
}
/* 角标音符 */
.music-fab__icon {
  position: absolute;
  top: -6px; right: -6px;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--cream);
  color: var(--sage-deep);
  font-size: 14px;
  line-height: 24px;
  text-align: center;
  box-shadow: 0 4px 8px rgba(93, 111, 82, 0.35);
  animation: note-bounce 3s ease-in-out infinite;
}
.music-player.is-playing .music-fab__icon {
  background: var(--cocoa);
  color: var(--cream);
  animation-duration: 0.8s;
}
@keyframes note-bounce {
  0%, 100% { transform: translateY(0) rotate(-8deg); }
  50% { transform: translateY(-3px) rotate(8deg); }
}

.music-player.expanded .music-fab { display: none; }

/* ---------- 展开态卡片 ---------- */
.music-card {
  width: 300px;
  background: var(--cream);
  border: 2px solid var(--ink);
  border-radius: 20px;
  padding: 16px 16px 14px;
  box-shadow:
    6px 8px 0 var(--sage-deep),
    0 24px 40px -16px rgba(42, 51, 41, 0.35);
  display: none;
  transform-origin: bottom right;
}
.music-player.expanded .music-card {
  display: block;
  animation: card-in 0.5s var(--ease-water);
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(20px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.music-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.music-card__kicker {
  font-family: var(--font-script);
  font-size: 18px;
  color: var(--sage-deep);
}
.music-card__collapse {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--cream-warm);
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  transition: background 0.3s;
}
.music-card__collapse:hover {
  background: var(--sage);
  color: var(--cream);
}

/* 当前播放（唱片 + 曲名） */
.music-card__now {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}
.music-cd {
  position: relative;
  width: 64px; height: 64px;
  flex-shrink: 0;
}
.music-cd__disc {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, var(--cream) 15%, var(--sage) 16%, var(--sage-deep) 100%);
  overflow: hidden;
  box-shadow:
    inset 0 0 0 2px var(--ink),
    0 6px 12px rgba(42, 51, 41, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}
.music-cd__disc::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: repeating-radial-gradient(circle at center, transparent 0 4px, rgba(42,51,41,0.2) 4px 5px);
  opacity: 0.5;
}
.music-cd__disc img {
  position: relative;
  z-index: 2;
  width: 70%;
  height: auto;
  border-radius: 50%;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}
.music-player.is-playing .music-cd__disc {
  animation: disc-spin 8s linear infinite;
}
@keyframes disc-spin {
  to { transform: rotate(360deg); }
}

.music-now-meta { flex: 1; min-width: 0; }
.music-now-title {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--ink);
  font-weight: 500;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.music-now-artist {
  font-family: var(--font-script);
  font-size: 16px;
  color: var(--sage-deep);
  margin-top: 2px;
}

/* 进度条 */
.music-progress {
  margin-bottom: 14px;
}
.music-progress__bar {
  height: 6px;
  background: var(--cream-warm);
  border: 1.5px solid var(--ink);
  border-radius: 100px;
  position: relative;
  cursor: pointer;
  overflow: hidden;
}
.music-progress__fill {
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 0;
  background: linear-gradient(90deg, var(--sage) 0%, var(--sage-deep) 100%);
  transition: width 0.2s linear;
}
.music-progress__time {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
}

/* 控制按钮 */
.music-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 14px;
}
.music-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--cream-warm);
  color: var(--ink);
  font-size: 14px;
  line-height: 1;
  transition: background 0.3s, transform 0.3s var(--ease-water);
}
.music-btn:hover {
  background: var(--sage);
  color: var(--cream);
  transform: translateY(-2px);
}
.music-btn--play {
  width: 52px; height: 52px;
  background: var(--ink);
  color: var(--cream);
  font-size: 18px;
  box-shadow: 0 6px 12px rgba(42, 51, 41, 0.3);
}
.music-btn--play:hover {
  background: var(--sage-deep);
}

/* 曲目列表 */
.music-list {
  list-style: none;
  margin: 0;
  padding: 10px 0 0;
  border-top: 1.5px dashed rgba(42, 51, 41, 0.2);
}
.music-list__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 4px;
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}
.music-list__item:hover {
  background: var(--cream-warm);
}
.music-list__item.active {
  background: rgba(156, 174, 147, 0.18);
  color: var(--sage-deep);
  font-weight: 500;
}
.music-list__num {
  font-family: var(--font-script);
  font-size: 16px;
  color: var(--sage);
  width: 22px;
}
.music-list__title {
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.music-list__state {
  font-size: 10px;
  color: var(--sage);
  opacity: 0;
}
.music-list__item.active .music-list__state { opacity: 1; }
.music-player.is-playing .music-list__item.active .music-list__state {
  animation: blink 1.2s ease-in-out infinite;
}
@keyframes blink {
  50% { opacity: 0.35; }
}

.music-foot {
  margin: 10px 0 0;
  padding-top: 8px;
  font-family: var(--font-script);
  font-size: 14px;
  color: var(--ink-soft);
  text-align: center;
  border-top: 1px dashed rgba(42, 51, 41, 0.12);
}

/* ---------- 移动端 ---------- */
@media (max-width: 640px) {
  .music-player {
    right: 16px;
    bottom: 16px;
  }
  .music-fab {
    width: 56px; height: 56px;
  }
  .music-fab__avatar {
    width: 48px; height: 48px;
  }
  .music-card {
    width: calc(100vw - 32px);
    max-width: 320px;
  }
}

/* 尊重 prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .music-cd__disc { animation: none !important; }
  .music-fab__waves span,
  .music-fab__icon { animation: none !important; }
}

/* CTA 区"试听歌单"小链接 */
.cta__playlist {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-family: var(--font-script);
  font-size: 20px;
  color: var(--cream);
  opacity: 0.85;
  border-bottom: 1.5px dashed rgba(245, 241, 232, 0.5);
  padding-bottom: 3px;
  transition: opacity 0.3s, transform 0.3s var(--ease-water), border-color 0.3s;
}
.cta__playlist:hover {
  opacity: 1;
  transform: translateX(4px);
  border-color: var(--cream);
}