BYW-VoiceHub/app/assets/css/lyric-player.module.css

/*
    给各个内部元素使用的样式
*/

/* 给每行歌词应用的样式 */
.lyricLine {
  position: absolute;
  backface-visibility: hidden;
  transform-origin: left;
  width: var(--amll-lp-width, 100%);
  min-width: var(--amll-lp-width, 100%);
  max-width: var(--amll-lp-width, 100%);
  width: 100%;
  height: fit-content;
  padding: 0.5em 1em;
  contain: content;
  will-change: transform;
  transition:
    opacity 0.25s,
    filter 0.2s,
    background-color 0.25s,
    box-shadow 0.25s;
  box-sizing: border-box;
  border-radius: 0.25em;

  padding-left: 1em;
  padding-right: 1em;

  @media screen and (max-width: 500px) {
    padding-left: 20px;
    padding-right: 20px;
  }

  &.dirty {
    opacity: 0;
    visibility: hidden;
  }

  &:has(> *):hover {
    background-color: var(--amll-lp-hover-bg-color, #fff1);
    /* box-shadow: 0 0 0 4px var(--amll-lp-hover-bg-color, #fff1); */
  }

  &:has(> *):active {
    background-color: var(--amll-lp-hover-bg-color, #ffffff05);
    /* box-shadow: 0 0 0 var(--amll-lp-hover-bg-color, #fff1); */
  }
}

.lyricBgLine {
  opacity: 0.0001;
  font-size: max(calc(1em * var(--amll-lp-bg-line-scale, 0.7)), 10px);
  transition:
    opacity 0.25s,
    scale 0.5s,
    filter 0.2s,
    background-color 0.25s,
    box-shadow 0.25s;
  /* 因为字体大小缩小了，故内边距要和主行字体大小统一，行边距计算公式为 100% / font-size 转 em 单位 */
  padding: 1vh calc(var(--amll-lp-line-padding-x, 1em) / var(--amll-lp-bg-line-scale, 0.7));

  &.active {
    transition:
      opacity 0.5s 0.25s,
      scale 1.5s cubic-bezier(0, 1, 0, 1) 0.25s,
      filter 0.2s,
      background-color 0.25s,
      box-shadow 0.25s;
    opacity: 0.4;
  }
}

:global(.amll-lyric-player) {
  &:hover .lyricLine {
    filter: unset !important;
  }

  &.hasDuetLine {
    .lyricLine:not(.lyricDuetLine) {
      padding-right: 15%;
    }

    .lyricDuetLine {
      padding-left: 15%;
    }
  }

  &:not(:global(.playing)) > .lyricBgLine {
    opacity: 0.4;
  }
}

.lyricDuetLine {
  text-align: right;
  transform-origin: right;
}

.lyricMainLine {
  transition: opacity 0.3s 0.1s;
  margin: -1em;
  padding: 1em;
  /* 为主歌词行增加文字阴影，以提升亮色背景下的可读性 */
  text-shadow:
    0 2px 6px rgba(0, 0, 0, 0.6),
    0 0 10px rgba(0, 0, 0, 0.5);

  & span {
    display: inline-block;
  }

  .romanWord {
    font-size: 0.5em;
    line-height: 1em;
  }

  & > span,
  span.emphasizeWrapper {
    white-space: pre-wrap;
    display: inline-block;
    padding: 1em;
    margin: -1em;
    will-change: transform;

    &.emphasize,
    span.emphasize {
      padding: 1em;
      margin: -1em;
      backface-visibility: hidden;

      & > span {
        padding: 1em;
        margin: -1em;
        will-change: transform;
        backface-visibility: hidden;
      }
    }
  }
}

.lyricSubLine {
  font-size: max(0.5em, 10px);
  line-height: 1.5em;
  transition: opacity 0.2s 0.25s;
  opacity: 0.3;
  /* 为副歌词行增加轻度文字阴影，避免白字贴白背景 */
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.disableSpring > * {
  transition:
    filter 0.25s,
    transform 0.5s,
    background-color 0.25s,
    box-shadow 0.25s;
}

.interludeDots {
  height: clamp(0.5em, 1vh, 3em);
  transition: opacity 0.25s;
  transform-origin: center;
  width: fit-content;
  padding: 2.5% 0.75em;
  position: absolute;
  display: flex;
  gap: 0.25em;
  left: 0;
  opacity: 0;

  &.enabled {
    opacity: 1;
  }

  & > * {
    width: clamp(0.5em, 1vh, 3em);
    height: clamp(0.5em, 1vh, 3em);
    display: inline-block;
    border-radius: 50%;
    aspect-ratio: 1 / 1;
    background-color: var(--amll-lp-color, white);
    margin-right: 4px;
  }

  &.duet {
    right: 0;
    transform-origin: center;
  }
}

@supports (mix-blend-mode: plus-lighter) {
  .lyricSubLine {
    opacity: 0.3;
  }
}

.tmpDisableTransition {
  transition: none !important;
}