mathew/frontend/app/assets/css/_prose.scss

@use 'mixins' as *;

// ---------- Prose (rendered markdown) ----------
.prose {
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text);
  overflow-wrap: break-word;

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

  > :first-child > :first-child, h1:first-child { margin-top: 0.6em; }

  h1,
  h2,
  h3,
  h4 {
    scroll-margin-top: 90px;
    line-height: 1.25;
    letter-spacing: -0.02em;
    font-weight: 730;
  }

  h1 { font-size: 1.85rem; margin: 1.4em 0 0.5em; }

  h2 {
    font-size: 1.42rem;
    margin: 2.1em 0 0.55em;
    padding-bottom: 0.32em;
    border-bottom: 1px solid var(--border);
  }

  h3 { font-size: 1.17rem; margin: 1.7em 0 0.45em; }

  h4 { font-size: 1.02rem; margin: 1.5em 0 0.4em; }

  p { margin: 0.95em 0; }

  a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
    transition: border-color 0.15s, color 0.15s;

    &:hover { color: var(--accent-strong); border-bottom-color: currentColor; }

    // internal wiki links written as [[Article Title]]
    &.wikilink { border-bottom-style: dotted; }
  }

  strong { font-weight: 730; }

  ul, ol { padding-left: 1.45em; margin: 0.9em 0; }

  li {
    margin: 0.35em 0;

    &::marker { color: var(--faint); }
  }

  blockquote {
    margin: 1.4em 0;
    padding: 0.75em 1.2em;
    border-left: 3px solid var(--accent);
    background: color-mix(in srgb, var(--accent) 6%, transparent);
    border-radius: 0 12px 12px 0;
    color: var(--muted);

    p { margin: 0.2em 0; }
  }

  // math callout boxes — ```theorem, ```example, … (see utils/markdown.ts):
  // the blockquote's shape, but the left edge wears the kind's colour, and
  // the label row is a native <details> toggle — the box folds away under it.
  .md-box {
    @each $kind in example theorem corollary definition proof proposition lemma {
      &.md-box--#{$kind} { --md-box: var(--box-#{$kind}); }
    }

    border-left-color: var(--md-box);
    background: color-mix(in srgb, var(--md-box) 6%, transparent);

    .md-box-title {
      display: flex;
      align-items: center;
      gap: 0.6em;
      margin: 0;
      color: var(--md-box);
      font-weight: 730;
      font-size: 0.85em;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      cursor: pointer;
      user-select: none;
      list-style: none;
      transition: margin-bottom 0.15s ease;

      &::-webkit-details-marker { display: none; }

      // the caret: points down while open, turns aside when the box folds
      &::before {
        content: '';
        flex: none;
        width: 0.42em;
        height: 0.42em;
        border-right: 2px solid currentColor;
        border-bottom: 2px solid currentColor;
        transform: rotate(45deg);
        transition: transform 0.15s ease;
      }
    }

    details[open] .md-box-title { margin-bottom: 0.4em; }

    // the fold's intent lands on the <details> the moment it is clicked
    // (see MarkdownView): the label closes in and the caret turns at the
    // *start* of the fold, while [open] itself settles only as it ends
    details[data-open='0'] .md-box-title { margin-bottom: 0; }

    details:not([open]) .md-box-title::before,
    details[data-open='0'] .md-box-title::before { transform: rotate(-45deg); }
  }

  hr { border: 0; border-top: 1px solid var(--border); margin: 2.4em 0; }

  table {
    display: block;
    width: max-content;
    max-width: 100%;
    overflow-x: auto;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 0.94em;
    border: 1px solid var(--border);
    border-radius: 12px;
  }

  thead { background: var(--surface-2); }

  th, td { padding: 0.58em 0.95em; border: 1px solid var(--border); text-align: left; }

  tbody tr:nth-child(even) { background: color-mix(in srgb, var(--surface) 55%, transparent); }

  img { max-width: 100%; border-radius: 12px; }

  kbd {
    font-family: inherit;
    font-size: 0.8em;
    border: 1px solid var(--border);
    border-bottom-width: 2px;
    border-radius: 6px;
    padding: 1px 6px;
    background: var(--surface-2);
  }

  // inline code
  code {
    background: color-mix(in srgb, var(--text) 8%, transparent);
    border: 1px solid var(--border);
    padding: 0.12em 0.42em;
    border-radius: 6px;
    font-size: 0.86em;
  }

  pre {
    margin: 1.4em 0;
    padding: 17px 20px;
    border-radius: 13px;
    border: 1px solid var(--border);
    background: var(--code-bg);
    overflow-x: auto;
    line-height: 1.65;
    font-size: 0.875rem;

    code {
      background: none;
      border: 0;
      padding: 0;
      font-size: inherit;
    }
  }
}

// code tokens (highlight.js)
.hljs-keyword, .hljs-selector-tag, .hljs-doctag { color: var(--tok-key); }

.hljs-string, .hljs-regexp, .hljs-addition { color: var(--tok-str); }

.hljs-comment { color: var(--tok-com); font-style: italic; }

.hljs-number, .hljs-variable, .hljs-template-variable { color: var(--tok-num); }

.hljs-title, .hljs-title.function_, .hljs-section { color: var(--tok-fn); }

.hljs-built_in,
.hljs-type,
.hljs-class .hljs-title,
.hljs-title.class_ {
  color: var(--tok-built);
}

.hljs-literal, .hljs-symbol, .hljs-bullet, .hljs-link { color: var(--tok-lit); }

.hljs-attr, .hljs-attribute, .hljs-property, .hljs-meta { color: var(--tok-meta); }

.hljs-deletion { color: var(--danger); }

// ---------- KaTeX ----------
.katex { font-size: 1.06em; }

.prose .katex-display {
  margin: 1.35em 0;
  padding: 0.3em 0.2em;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
}

.prose .katex-error { color: var(--danger); font-family: inherit; }