hugo-book/assets/_markdown.scss

@import "variables";

.markdown {
  line-height: 1.6;

  // remove padding at the beginning of page
  > :first-child {
    margin-top: 0;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-weight: $body-font-weight;
    line-height: 1;
    margin-top: 1.5em;
    margin-bottom: $padding-16;

    a.anchor {
      opacity: 0;
      font-size: 0.75em;
      vertical-align: middle;
      text-decoration: none;
      margin-inline-start: .25em;
    }

    &:hover a.anchor,
    a.anchor:focus {
      opacity: initial;
    }
  }

  h1 { font-size: $font-size-16 * 2; }
  h2 { font-size: $font-size-16 * 1.5; }
  h3 { font-size: $font-size-16 * 1.25; }
  h4 { font-size: $font-size-16 * 1.125; }
  h5 { font-size: $font-size-16 * 1; }
  h6 { font-size: $font-size-16 * 0.875; }

  b,
  optgroup,
  strong {
    font-weight: bolder;
  }

  a {
    text-decoration: none;

    &[href]:hover {
      text-decoration: underline;
    }
    &[href]:visited {
      color: var(--color-visited-link);
    }
  }

  img {
    max-width: 100%;
    height: auto;
  }

  code {
    direction: ltr;
    unicode-bidi: embed;
    padding: 0 $padding-4;
    background: var(--gray-200);
    border-radius: $border-radius;
    font-size: 0.875em;
  }

  pre {
    padding: $padding-16;
    background: var(--gray-100);
    border-radius: $border-radius;
    overflow-x: auto;

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

  p {
    word-wrap: break-word;
  }

  blockquote {
    margin: $padding-16 0;
    padding: $padding-8 $padding-16 $padding-8 ($padding-16 - $padding-4); //to keep total left space 16dp

    border-inline-start: $padding-4 solid var(--gray-200);
    border-radius: $border-radius;

    :first-child {
      margin-top: 0;
    }
    :last-child {
      margin-bottom: 0;
    }
  }

  table {
    overflow: auto;
    display: block;
    border-spacing: 0;
    border-collapse: collapse;
    margin-top: $padding-16;
    margin-bottom: $padding-16;

    tr th,
    tr td {
      padding: $padding-8 $padding-16;
      border: $padding-1 solid var(--gray-200);
      text-align: start;
    }

    tr:nth-child(2n) {
      background: var(--gray-100);
    }
  }

  hr {
    height: $padding-1;
    border: none;
    background: var(--gray-200);
  }

  ul,
  ol {
    padding-inline-start: $padding-16 * 2;
    word-wrap: break-word;
  }

  dl {
    dt {
      font-weight: bolder;
      margin-top: $padding-16;
    }

    dd {
      margin-inline-start: 0;
      margin-bottom: $padding-16;
    }
  }

  // Special case for highlighted code with line numbers
  .highlight {
    direction: ltr;
    unicode-bidi: embed;
    border-radius: $border-radius;

    table tr {
      td pre code > span {
        display: flex;
      }
      
      td:nth-child(1) pre {
        margin: 0;
        padding-inline-end: 0;
      }
      td:nth-child(2) pre {
        margin: 0;
        padding-inline-start: 0;
      }
    }
  }

  details {
    padding: $padding-16;
    margin: $padding-16 0;
    border: $padding-1 solid var(--gray-200);
    border-radius: $border-radius;

    summary {
      line-height: 1;
      padding: $padding-16;
      margin: -$padding-16;
      cursor: pointer;
      list-style: none;

      &::before {
        content: "›";
        display: inline-block;
        margin-inline-end: $padding-8;
        transition: transform 0.1s ease-in-out;
      }
    }

    &[open] summary {
      margin-bottom: 0;

      &::before {
        transform: rotate(90deg);
      }
    }
  }

  figure {
    margin: $padding-16 0;

    figcaption {
      @extend .markdown-inner;
      margin-top: $padding-16;
    }
  }
}

.markdown-inner {
  // Utility class to remove extra margin in nested markdown content
  > :first-child {
    margin-top: 0;
  }
  > :last-child {
    margin-bottom: 0;
  }
}