lila/ui/lib/css/component/_markdown.scss

@mixin rendered-markdown(
  $element-margin: 1em,
  $img-max-height: 50vh,
  $table: true,
  $list: true,
  $img: true,
  $h1: true,
  $h2: true
) {
  @extend %break-word;

  strong {
    font-weight: bold;
  }

  em {
    font-style: italic;
  }

  p,
  pre {
    margin: $element-margin 0;
  }

  @if $list {
    ol,
    ul {
      margin: $element-margin 0;
      padding-inline-start: 2em;
    }

    li ol,
    li ul {
      margin: 0;
    }

    ol > li {
      list-style: decimal;
    }

    ul > li {
      list-style: disc;
    }

    li p {
      display: inline-block;
      vertical-align: top;
      margin-top: 0;
    }
  }

  @if $h1 {
    /* should not be used */
    h1 {
      font-size: 1em;
      margin: 0;
    }
  }

  @if $h2 {
    h2 {
      &:not(:first-child) {
        margin-top: calc(0.9 * #{$element-margin});
      }

      border-bottom: 1px solid $c-brag;
      line-height: 1.5em;
      padding-bottom: calc(0.25 * #{$element-margin});
    }
  }

  h3 {
    @include fluid-size('font-size', 18px, 27px);

    font-weight: bold;
    margin: calc(0.8 * #{$element-margin}) 0 calc(0.5 * #{$element-margin}) 0;

    &:first-child {
      margin-top: 0;
    }
  }

  h4 {
    @include fluid-size('font-size', 17px, 23px);
  }

  h2,
  h3,
  h4 {
    a[id] {
      opacity: 0;

      &::before {
        color: $c-font-dimmer;
        content: $licon-Link;
        font-family: lichess;
        margin-left: -3rem;
        width: 3rem;
        position: absolute;
      }
    }

    &:hover {
      a[id] {
        opacity: 1;
      }
    }
  }

  @if $img {
    img {
      display: block;
      max-width: 100%;
      max-height: $img-max-height;
      margin: auto;
    }
  }

  @if $table {
    table {
      margin: $element-margin 0;
    }

    th,
    td {
      &[align='left'] {
        text-align: left;
      }

      &[align='center'] {
        text-align: center;
      }

      &[align='right'] {
        text-align: right;
      }
    }
  }

  p {
    time {
      border-bottom: 1px dashed $c-font-dim;
      cursor: help;
      font-size: 100%;
    }

    a {
      & > time {
        border-color: $c-link;
      }

      &:hover > time {
        border-color: $c-link-hover;
      }
    }
  }
}

@mixin rendered-markdown-code {
  $c-code-bg: $c-bg-zebra;
  $c-code-font: $c-font-clear;

  code {
    @extend %box-radius;

    font-family: monospace;
    padding: 0.2em 0.5em;
    background: $c-code-bg;
    color: $c-code-font;
    font-size: 0.9em;
    white-space: pre-wrap;
  }

  pre {
    @extend %box-neat;

    background: $c-code-bg;
    padding: 1em 1.5em;
    line-height: 1.4em;

    code {
      background: none;
      padding: 0;
    }
  }
}

@mixin rendered-markdown-quote {
  blockquote {
    color: $c-font-dim;
    border-inline-start: 0.3em solid $c-font-dimmer;
    padding-inline-start: 1em;
  }
}

@mixin rendered-markdown-img {
  img {
    @extend %box-neat;

    max-width: 100%;
  }

  /* image caption */
  img + br:has(+ em) {
    display: none;
  }

  img + em,
  img + br + em {
    color: $c-font-dim;
    margin-top: 10px;
    display: block;
    font-size: 0.8em;
    text-align: center;
  }
}

@mixin rendered-markdown-embed {
  .embed {
    @extend %video;

    margin: $block-gap auto;

    > iframe {
      left: 0;
    }
  }

  .twitter-tweet {
    color-scheme: normal;
    margin: auto;
  }

  .private-study {
    color: $c-brag;
    font-size: 1.2em;
  }
}