/* =========================
   菜单背景音乐按钮
   ========================= */

.menu-music-control {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 25000;

  min-width: 176px;
  min-height: 54px;

  display: flex;
  align-items: center;
  gap: 12px;

  padding: 9px 15px;

  border: 1px solid
    rgba(255, 45, 45, 0.72);

  color: #ffffff;

  background:
    linear-gradient(
      135deg,
      rgba(18, 8, 10, 0.96),
      rgba(5, 9, 13, 0.97)
    );

  font-family:
    ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;

  text-align: left;
  cursor: pointer;

  box-shadow:
    inset 4px 0 0 #ff2638,
    0 12px 35px rgba(0, 0, 0, 0.45),
    0 0 24px rgba(255, 38, 56, 0.12);

  transition:
    transform 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.18s ease;
}

.menu-music-control:hover {
  transform: translateY(-2px);

  border-color: #ff4554;

  box-shadow:
    inset 4px 0 0 #ff2638,
    0 14px 40px rgba(0, 0, 0, 0.52),
    0 0 32px rgba(255, 38, 56, 0.24);
}

.menu-music-control:focus-visible {
  outline: 2px solid #fcee09;
  outline-offset: 3px;
}


/* 音频动态图标 */

.menu-music-visualizer {
  width: 30px;
  height: 28px;

  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 3px;

  flex: 0 0 auto;
}

.menu-music-bar {
  width: 4px;
  height: 6px;

  background: #ff3547;

  box-shadow:
    0 0 8px
    rgba(255, 38, 56, 0.55);

  transform-origin: bottom;
}


/* 播放时音柱跳动 */

.menu-music-control.is-playing
.menu-music-bar:nth-child(1) {
  animation:
    menu-music-wave
    0.72s
    ease-in-out
    infinite alternate;
}

.menu-music-control.is-playing
.menu-music-bar:nth-child(2) {
  animation:
    menu-music-wave
    0.48s
    ease-in-out
    0.08s
    infinite alternate;
}

.menu-music-control.is-playing
.menu-music-bar:nth-child(3) {
  animation:
    menu-music-wave
    0.62s
    ease-in-out
    0.16s
    infinite alternate;
}

.menu-music-control.is-playing
.menu-music-bar:nth-child(4) {
  animation:
    menu-music-wave
    0.42s
    ease-in-out
    0.05s
    infinite alternate;
}

@keyframes menu-music-wave {
  from {
    height: 5px;
  }

  to {
    height: 26px;
  }
}


/* 按钮文字 */

.menu-music-copy {
  min-width: 0;
  display: block;
}

.menu-music-code {
  display: block;

  margin-bottom: 3px;

  color: #ff5360;

  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.13em;
}

.menu-music-label {
  display: block;

  overflow: hidden;

  color: #ffffff;

  font-size: 12px;
  font-weight: 800;

  white-space: nowrap;
  text-overflow: ellipsis;
}


/* 暂停状态 */

.menu-music-control:not(.is-playing)
.menu-music-bar {
  height: 5px;
  opacity: 0.58;
}

.menu-music-control.is-playing {
  border-color:
    rgba(255, 45, 45, 0.94);

  background:
    linear-gradient(
      135deg,
      rgba(92, 5, 14, 0.96),
      rgba(8, 11, 15, 0.98)
    );
}


/* 音乐文件加载失败 */

.menu-music-control.has-error {
  border-color: #777777;
  cursor: not-allowed;
  box-shadow:
    inset 4px 0 0 #777777,
    0 12px 35px rgba(0, 0, 0, 0.45);
}

.menu-music-control.has-error
.menu-music-code {
  color: #aaaaaa;
}


/* 手机 */

@media (max-width: 620px) {
  .menu-music-control {
    left: 10px;
    bottom: 10px;

    min-width: 148px;
    min-height: 48px;

    padding: 7px 11px;
  }

  .menu-music-visualizer {
    width: 24px;
    height: 23px;
  }

  .menu-music-label {
    font-size: 11px;
  }

  .menu-music-bar {
    width: 3px;
  }
}


/* 用户系统设置为减少动画时 */

@media (prefers-reduced-motion: reduce) {
  .menu-music-control,
  .menu-music-bar {
    animation: none !important;
    transition: none !important;
  }

  .menu-music-control.is-playing
  .menu-music-bar {
    height: 18px;
  }
}