website/assets/scss/extend.scss

// This is copied from https://stackoverflow.com/a/19721069.
$tooltip-size: 5em;
$line-height: 1.45;

:root {
  --accented-border-style: var(--foreground) solid .1vw;

  --body-family: "Source Serif Pro", "IBM Plex Serif", "Noto Serif", serif;
  --header-family: "Source Sans Pro", "IBM Plex Sans", "Noto Sans", sans-serif;
  --mono-family: "Source Code Pro", "IBM Plex Mono", "Noto Mono", monospace;
}

// Base styles.
a:hover { color: var(--base0B); }

hr {
  border-color: var(--foreground);
}

main > article {
  line-height: $line-height;
}

// Layouts
.site__title {
  --size: 2rem;
  margin-bottom: unset;
  font-size: var(--size);
  line-height: unset;
}

article.post {
  padding: 0.5em;
  background: var(--base01);
}

// Asciidoctor roles (e.g., [.text-center]) on a block.
.text-center {
  text-align: center;
}

.line-through {
  text-decoration: line-through;
}

// Custom layouts
#logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: $tooltip-size;
  width: $tooltip-size;

  svg {
    --size: 4em;
    height: var(--size);
    width: var(--size);
    fill: var(--base0C);
    position: relative;
    animation: rainbow 3s infinite, pulse 2s alternate infinite, bounce 0.6s ease-in-out alternate infinite;
  }
}

@keyframes bounce {
  $baseSize: 3em;
  $baseRotation: 20deg;
  from {
    transform: rotate($baseRotation) translateX($baseSize) translateY(-#{$baseSize / 5});
  }
  to {
    transform: rotate(-$baseRotation) translateX(-$baseSize) translateY(-#{$baseSize / 5});
  }
}

@keyframes pulse {
  from { width: #{$tooltip-size / 2}; }
  to { width: #{$tooltip-size}; }
}

@keyframes rainbow {
  $colorOrder: "07" "08" "09" "0A" "0B" "0C" "0D" "0E" "0F";
  $divide: floor(100 / length($colorOrder));
  @for $i from 1 to length($colorOrder) {
    #{$i * $divide}% {
      fill: var(--base#{nth($colorOrder, $i)});
    }
  }
}

[data-tooltip] {
  &::before {
    --scale: 0;

    background: var(--base01);
    content: attr(data-tooltip);
    font-size: 0.8em;
    padding: 0.5em;
    position: absolute;
    transform: translateY(var(--translate-y, -#{round($tooltip-size / 2)})) scale(var(--scale));
    transform-origin: bottom center;
    width: max-content;
    max-width: 100%;
  }

  &:hover::before {
    --scale: 1;
  }
}

// Asciidoctor-specific styles
sup.footnote {
  vertical-align: baseline;
  position: relative;
  top: 0;
  left: 0;
  font-size: 1rem;
}

.anchor {
  border-bottom: unset;
  &:hover {
    border-bottom: unset;
  }

  &::before {
    content: "§";
    display: inline-block;
    margin-right: 0.25em;
  }
}

.conum {
  color: var(--base05) !important;
  background-color: var(--base02);
  user-select: none;
}

.quoteblock {
  blockquote {
    border: var(--accented-border-style);
    margin: auto;
    padding: 1em 0.5em;
  }
}

@keyframes target-fade {
  0% {
    background: var(--base0D);
    color: unset;
  }
  100% {
    background-color: transparent;
  }
}

#footnotes > :not(hr) {
  margin: 1em;
}

[class$="block"], :is(.admonitionblock) {
  margin: var(--vertical-rhythm) 0;
}

p.tableblock {
  margin: unset;
}

*:not(.listingblock, .openblock) {
  > .attribution,
  > .title {
    background: var(--foreground);
    color: var(--base00);
    font-size: 0.9em;
    padding: 0.5em;
  }

  > .content {
    border: var(--accented-border-style);
    padding: 0.5em;
  }
}

.listingblock {
  position: relative;

  > *.title {
    background: var(--foreground);
    color: var(--background);
    font-size: 0.9em;
    padding: 0.5em;

    code { background: unset; }
  }

  > *.content pre {
    margin-top: unset;
  }

  > .listingblock__btn-row {
    $gap: 0.3em;

    display: flex;
    gap: $gap;
    flex-flow: row;
    justify-content: center;
    align-items: center;

    position: absolute;
    top: 0;
    right: 0;

    > button {
      background: var(--base01);
      padding: $gap;

      &:hover {
        background: var(--selection-color);
        color: var(--base05);
      }

      &:active {
        background: var(--accent-color);
        color: var(--base06);
      }
    }
  }

  &:fullscreen {
    pre, code {
      border: unset;
      max-height: 100vh;
      height: 100vh;
      margin: 0;
      overflow: auto;
    }

    > .listingblock__btn-row {
      top: 0;
    }
  }
}

.admonitionblock {
  table {
    border: unset;

    tbody {
      tr + tr, tr:first-child { border-top: unset; }
    }
  }

  .icon {
    background: var(--foreground);
    vertical-align: middle;
    width: 12%;

    > .title {
      display: flex;
      justify-content: center;
    }
  }

  .content {
    background: var(--base01);
    border: unset;
  }
}

.content > .paragraph:first-child > p:first-child {
  margin-top: unset;
}

.imageblock {
  > .content {
    display: flex;
    justify-content: center;
  }

  > .title {
    text-align: center;
  }
}

p {
  margin-bottom: unset;
}

.sidebarblock {
  > .content {
    background: var(--base01);
    border: unset;
    padding: var(--vertical-rhythm);

    > .title {
      background: unset;
      color: unset;
      font-family: var(--header-family);
      font-size: 1em;
      font-weight: bold;
      padding: unset;
    }
  }
}

// This setup will use asciidoctor-rouge.
.rouge.highlight, code[data-lang] {
  &::selection, ::selection {
    background: var(--selection-color);
    color: unset;
  }
}

@media all and (max-width: 860px) {
  .imageblock {
    > .content {
      width: 100% !important;
    }
  }
}