roadmap/assets/styles/_callouts.scss

:root {
  --callout-summary: #00b0ff;
  --callout-summary-accent: #7fd7ff;
  --callout-bug: #f50057;
  --callout-bug-accent: #ff7aa9;
  --callout-danger: #ff1744;
  --callout-danger-accent: #ff8aa1;
  --callout-example: #7c4dff;
  --callout-example-accent: #bda5ff;
  --callout-fail: #ff5252;
  --callout-fail-accent: #ffa8a8;
  --callout-info: #00b8d4;
  --callout-info-accent: #69ebff;
  --callout-note: #448aff;
  --callout-note-accent: #a1c4ff;
  --callout-question: #64dd17;
  --callout-question-accent: #b0f286;
  --callout-quote: #9e9e9e;
  --callout-quote-accent: #cecece;
  --callout-done: #00c853;
  --callout-done-accent: #63ffa4;
  --callout-important: #00bfa5;
  --callout-important-accent: #5fffe9;
  --callout-warning: #ff9100;
  --callout-warning-accent: #ffc87f;
}

[saved-theme=dark] {
  --callout-summary: #00b0ff !important;
  --callout-summary-accent: #00587f !important;
  --callout-bug: #f50057 !important;
  --callout-bug-accent: #7a002b !important;
  --callout-danger: #ff1744 !important;
  --callout-danger-accent: #8b001a !important;
  --callout-example: #7c4dff !important;
  --callout-example-accent: #2b00a6 !important;
  --callout-fail: #ff5252 !important;
  --callout-fail-accent: #a80000 !important;
  --callout-info: #00b8d4 !important;
  --callout-info-accent: #005c6a !important;
  --callout-note: #448aff !important;
  --callout-note-accent: #003ca1 !important;
  --callout-question: #64dd17 !important;
  --callout-question-accent: #006429 !important;
  --callout-quote: #9e9e9e !important;
  --callout-quote-accent: #4f4f4f !important;
  --callout-done: #00c853 !important;
  --callout-done-accent: #006429 !important;
  --callout-important: #00bfa5 !important;
  --callout-important-accent: #005f52 !important;
  --callout-warning: #ff9100 !important;
  --callout-warning-accent: #7f4800 !important;
}

blockquote.callout-collapsible {
  cursor: pointer;

  &.callout-collapsible::after {
    content: '-';
    right: 6px;
    font-weight: bolder;
    font-family: Courier New, Courier, monospace;
  }
}

blockquote.callout-collapsed {
  & > p { border-bottom-right-radius: 5px !important; }
  padding-bottom: 0 !important;
  &::after {
    content: '+' !important;
  }
  & > *:not(:first-child) {
    display: none !important;
  }
}

blockquote[class*="-callout"] {
  margin-right: 0;
  border-radius: 5px;
  position: relative;
  padding-left: 0 !important;
  padding-bottom: 0.25em;
  color: var(--dark);
  background-color: var(--lightgray);
  & > p {
    border-top-right-radius: 5px;
    padding: 0.5em 1em;
    margin: 0;
    color: var(--gray);
    &:first-child {
      font-weight: 600;
      color: var(--dark);
      padding: 0.4em 30px;
    }
  }
}

blockquote[class*="-callout"] > p:first-child::after, blockquote.callout-collapsible::after {
  display: inline-block;
  height: 18px;
  width: 18px;
  position: absolute;
  top: 0.4em;
  margin: 0.2em 0.4em;
}

blockquote[class*="-callout"] > p:first-child {
  font-weight: bold;
  padding: 0.4em 35px;

  &::after {
    left: 0;
  }
}

$summary: summary, abstract, tldr;
$bug: bug;
$danger: danger, error;
$example: example;
$fail: fail, failure, missing;
$info: info, todo;
$note: note;
$question: question, help, faq;
$quote: quote, cite;
$done: done, success, check;
$important: important, tip, hint;
$warning: warning, caution, attention;
$types: $summary, $bug, $danger, $example, $fail, $info, $note, $question, $quote, $done, $important, $warning;
$svgs: ();
$svgs: map-merge($svgs, ($summary: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='book' class='svg-inline--callout-fa fa-book fa-w-14' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512'%3E%3Cpath fill='currentColor' d='M448 360V24c0-13.3-10.7-24-24-24H96C43 0 0 43 0 96v320c0 53 43 96 96 96h328c13.3 0 24-10.7 24-24v-16c0-7.5-3.5-14.3-8.9-18.7-4.2-15.4-4.2-59.3 0-74.7 5.4-4.3 8.9-11.1 8.9-18.6zM128 134c0-3.3 2.7-6 6-6h212c3.3 0 6 2.7 6 6v20c0 3.3-2.7 6-6 6H134c-3.3 0-6-2.7-6-6v-20zm0 64c0-3.3 2.7-6 6-6h212c3.3 0 6 2.7 6 6v20c0 3.3-2.7 6-6 6H134c-3.3 0-6-2.7-6-6v-20zm253.4 250H96c-17.7 0-32-14.3-32-32 0-17.6 14.4-32 32-32h285.4c-1.9 17.1-1.9 46.9 0 64z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($bug: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='bug' class='svg-inline--callout-fa fa-bug fa-w-16' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='currentColor' d='M511.988 288.9c-.478 17.43-15.217 31.1-32.653 31.1H424v16c0 21.864-4.882 42.584-13.6 61.145l60.228 60.228c12.496 12.497 12.496 32.758 0 45.255-12.498 12.497-32.759 12.496-45.256 0l-54.736-54.736C345.886 467.965 314.351 480 280 480V236c0-6.627-5.373-12-12-12h-24c-6.627 0-12 5.373-12 12v244c-34.351 0-65.886-12.035-90.636-32.108l-54.736 54.736c-12.498 12.497-32.759 12.496-45.256 0-12.496-12.497-12.496-32.758 0-45.255l60.228-60.228C92.882 378.584 88 357.864 88 336v-16H32.666C15.23 320 .491 306.33.013 288.9-.484 270.816 14.028 256 32 256h56v-58.745l-46.628-46.628c-12.496-12.497-12.496-32.758 0-45.255 12.498-12.497 32.758-12.497 45.256 0L141.255 160h229.489l54.627-54.627c12.498-12.497 32.758-12.497 45.256 0 12.496 12.497 12.496 32.758 0 45.255L424 197.255V256h56c17.972 0 32.484 14.816 31.988 32.9zM257 0c-61.856 0-112 50.144-112 112h224C369 50.144 318.856 0 257 0z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($danger: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='bolt' class='svg-inline--callout-fa fa-bolt fa-w-10' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 320 512'%3E%3Cpath fill='currentColor' d='M296 160H180.6l42.6-129.8C227.2 15 215.7 0 200 0H56C44 0 33.8 8.9 32.2 20.8l-32 240C-1.7 275.2 9.5 288 24 288h118.7L96.6 482.5c-3.6 15.2 8 29.5 23.3 29.5 8.4 0 16.4-4.4 20.8-12l176-304c9.3-15.9-2.2-36-20.7-36z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($example: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='list-ol' class='svg-inline--callout-fa fa-list-ol fa-w-16' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='currentColor' d='M61.77 401l17.5-20.15a19.92 19.92 0 0 0 5.07-14.19v-3.31C84.34 356 80.5 352 73 352H16a8 8 0 0 0-8 8v16a8 8 0 0 0 8 8h22.83a157.41 157.41 0 0 0-11 12.31l-5.61 7c-4 5.07-5.25 10.13-2.8 14.88l1.05 1.93c3 5.76 6.29 7.88 12.25 7.88h4.73c10.33 0 15.94 2.44 15.94 9.09 0 4.72-4.2 8.22-14.36 8.22a41.54 41.54 0 0 1-15.47-3.12c-6.49-3.88-11.74-3.5-15.6 3.12l-5.59 9.31c-3.72 6.13-3.19 11.72 2.63 15.94 7.71 4.69 20.38 9.44 37 9.44 34.16 0 48.5-22.75 48.5-44.12-.03-14.38-9.12-29.76-28.73-34.88zM496 224H176a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h320a16 16 0 0 0 16-16v-32a16 16 0 0 0-16-16zm0-160H176a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h320a16 16 0 0 0 16-16V80a16 16 0 0 0-16-16zm0 320H176a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h320a16 16 0 0 0 16-16v-32a16 16 0 0 0-16-16zM16 160h64a8 8 0 0 0 8-8v-16a8 8 0 0 0-8-8H64V40a8 8 0 0 0-8-8H32a8 8 0 0 0-7.14 4.42l-8 16A8 8 0 0 0 24 64h8v64H16a8 8 0 0 0-8 8v16a8 8 0 0 0 8 8zm-3.91 160H80a8 8 0 0 0 8-8v-16a8 8 0 0 0-8-8H41.32c3.29-10.29 48.34-18.68 48.34-56.44 0-29.06-25-39.56-44.47-39.56-21.36 0-33.8 10-40.46 18.75-4.37 5.59-3 10.84 2.8 15.37l8.58 6.88c5.61 4.56 11 2.47 16.12-2.44a13.44 13.44 0 0 1 9.46-3.84c3.33 0 9.28 1.56 9.28 8.75C51 248.19 0 257.31 0 304.59v4C0 316 5.08 320 12.09 320z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($fail: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='times-circle' class='svg-inline--callout-fa fa-times-circle fa-w-16' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='currentColor' d='M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm121.6 313.1c4.7 4.7 4.7 12.3 0 17L338 377.6c-4.7 4.7-12.3 4.7-17 0L256 312l-65.1 65.6c-4.7 4.7-12.3 4.7-17 0L134.4 338c-4.7-4.7-4.7-12.3 0-17l65.6-65-65.6-65.1c-4.7-4.7-4.7-12.3 0-17l39.6-39.6c4.7-4.7 12.3-4.7 17 0l65 65.7 65.1-65.6c4.7-4.7 12.3-4.7 17 0l39.6 39.6c4.7 4.7 4.7 12.3 0 17L312 256l65.6 65.1z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($info: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='info-circle' class='svg-inline--callout-fa fa-info-circle fa-w-16' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='currentColor' d='M256 8C119.043 8 8 119.083 8 256c0 136.997 111.043 248 248 248s248-111.003 248-248C504 119.083 392.957 8 256 8zm0 110c23.196 0 42 18.804 42 42s-18.804 42-42 42-42-18.804-42-42 18.804-42 42-42zm56 254c0 6.627-5.373 12-12 12h-88c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h12v-64h-12c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h64c6.627 0 12 5.373 12 12v100h12c6.627 0 12 5.373 12 12v24z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($note: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='pencil-alt' class='svg-inline--callout-fa fa-pencil-alt fa-w-16' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='currentColor' d='M497.9 142.1l-46.1 46.1c-4.7 4.7-12.3 4.7-17 0l-111-111c-4.7-4.7-4.7-12.3 0-17l46.1-46.1c18.7-18.7 49.1-18.7 67.9 0l60.1 60.1c18.8 18.7 18.8 49.1 0 67.9zM284.2 99.8L21.6 362.4.4 483.9c-2.9 16.4 11.4 30.6 27.8 27.8l121.5-21.3 262.6-262.6c4.7-4.7 4.7-12.3 0-17l-111-111c-4.8-4.7-12.4-4.7-17.1 0zM124.1 339.9c-5.5-5.5-5.5-14.3 0-19.8l154-154c5.5-5.5 14.3-5.5 19.8 0s5.5 14.3 0 19.8l-154 154c-5.5 5.5-14.3 5.5-19.8 0zM88 424h48v36.3l-64.5 11.3-31.1-31.1L51.7 376H88v48z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($question: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='question-circle' class='svg-inline--callout-fa fa-question-circle fa-w-16' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='currentColor' d='M504 256c0 136.997-111.043 248-248 248S8 392.997 8 256C8 119.083 119.043 8 256 8s248 111.083 248 248zM262.655 90c-54.497 0-89.255 22.957-116.549 63.758-3.536 5.286-2.353 12.415 2.715 16.258l34.699 26.31c5.205 3.947 12.621 3.008 16.665-2.122 17.864-22.658 30.113-35.797 57.303-35.797 20.429 0 45.698 13.148 45.698 32.958 0 14.976-12.363 22.667-32.534 33.976C247.128 238.528 216 254.941 216 296v4c0 6.627 5.373 12 12 12h56c6.627 0 12-5.373 12-12v-1.333c0-28.462 83.186-29.647 83.186-106.667 0-58.002-60.165-102-116.531-102zM256 338c-25.365 0-46 20.635-46 46 0 25.364 20.635 46 46 46s46-20.636 46-46c0-25.365-20.635-46-46-46z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($quote: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='quote-right' class='svg-inline--callout-fa fa-quote-right fa-w-16' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='currentColor' d='M464 32H336c-26.5 0-48 21.5-48 48v128c0 26.5 21.5 48 48 48h80v64c0 35.3-28.7 64-64 64h-8c-13.3 0-24 10.7-24 24v48c0 13.3 10.7 24 24 24h8c88.4 0 160-71.6 160-160V80c0-26.5-21.5-48-48-48zm-288 0H48C21.5 32 0 53.5 0 80v128c0 26.5 21.5 48 48 48h80v64c0 35.3-28.7 64-64 64h-8c-13.3 0-24 10.7-24 24v48c0 13.3 10.7 24 24 24h8c88.4 0 160-71.6 160-160V80c0-26.5-21.5-48-48-48z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($done: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='check-circle' class='svg-inline--callout-fa fa-check-circle fa-w-16' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='currentColor' d='M504 256c0 136.967-111.033 248-248 248S8 392.967 8 256 119.033 8 256 8s248 111.033 248 248zM227.314 387.314l184-184c6.248-6.248 6.248-16.379 0-22.627l-22.627-22.627c-6.248-6.249-16.379-6.249-22.628 0L216 308.118l-70.059-70.059c-6.248-6.248-16.379-6.248-22.628 0l-22.627 22.627c-6.248 6.248-6.248 16.379 0 22.627l104 104c6.249 6.249 16.379 6.249 22.628.001z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($important: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='fire' class='svg-inline--callout-fa fa-fire fa-w-12' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 384 512'%3E%3Cpath fill='currentColor' d='M216 23.86c0-23.8-30.65-32.77-44.15-13.04C48 191.85 224 200 224 288c0 35.63-29.11 64.46-64.85 63.99-35.17-.45-63.15-29.77-63.15-64.94v-85.51c0-21.7-26.47-32.23-41.43-16.5C27.8 213.16 0 261.33 0 320c0 105.87 86.13 192 192 192s192-86.13 192-192c0-170.29-168-193-168-296.14z'%3E%3C/path%3E%3C/svg%3E")));
$svgs: map-merge($svgs, ($warning: url("data:image/svg+xml,%3Csvg aria-hidden='true' focusable='false' data-icon='exclamation-triangle' class='svg-inline--callout-fa fa-exclamation-triangle fa-w-18' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 576 512'%3E%3Cpath fill='currentColor' d='M569.517 440.013C587.975 472.007 564.806 512 527.94 512H48.054c-36.937 0-59.999-40.055-41.577-71.987L246.423 23.985c18.467-32.009 64.72-31.951 83.154 0l239.94 416.028zM288 354c-25.405 0-46 20.595-46 46s20.595 46 46 46 46-20.595 46-46-20.595-46-46-46zm-43.673-165.346l7.418 136c.347 6.364 5.609 11.346 11.982 11.346h48.546c6.373 0 11.635-4.982 11.982-11.346l7.418-136c.375-6.874-5.098-12.654-11.982-12.654h-63.383c-6.884 0-12.356 5.78-11.981 12.654z'%3E%3C/path%3E%3C/svg%3E")));

@function getstr($l) {
  $v: nth($l, 1);
  @return $v;
}

@each $type in $types {
  @each $s in $type {
    blockquote.#{$s}-callout {
      border-left: 6px solid var(--callout-#{getstr($type)}) !important;
      & > p:first-child {
        background-color: var(--callout-#{getstr($type)}-accent) !important;
        &::after {
          content: '';
          -webkit-mask: map-get($svgs, $type);
          mask: map-get($svgs, $type);
          background-color: var(--callout-#{getstr($type)}) !important;
          -webkit-mask-size: contain;
          mask-size: contain;
          -webkit-mask-repeat: no-repeat;
          mask-repeat: no-repeat;
          -webkit-mask-position: center;
          mask-position: center;
        }
      }
    }
  }
}