examples/template.css

/** from ghwikipp.css */
:root {
  color-scheme: dark light; /* both supported */
}

body {
  background-color: white;
  padding: 2vw;
  color: #333;
  max-width: 1200px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.5;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  overflow-wrap: break-word;
}

a {
  color: #0969da;
  /* text-decoration: none; */
}

a:visited {
  color: #064998;
}

h1 {
  border-bottom: 2px solid #efefef;
}

h2 {
  border-bottom: 1px solid #efefef;
}

p {
  max-width: 85ch;
}

li {
  max-width: 85ch;
}

div.sourceCode {
  background-color: #f6f8fa;
  max-width: 100%;
  padding: 16px;
}

code {
  background-color: #f6f8fa;
  padding: 0px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

table {
  border: 1px solid #808080;
  border-collapse: collapse;
}

td {
  border: 1px solid #808080;
  padding: 5px;
}

tr:nth-child(even) {
  background-color: #f6f8fa;
}

.wikitopbanner {
  background-color: #efefef;
  padding: 10px;
  margin-bottom: 10px;
  width: auto;
}

.wikibottombanner {
  background-color: #efefef;
  padding: 10px;
  margin-top: 10px;
  width: auto;
}

.alertBox {
  background-color: #f8d7da;
  border: 1px solid #f5c6cb;
  max-width: 60%;
  padding: 10;
  margin: auto;
}

.anchorImage {
  visibility: hidden;
  padding-left: 0.2em;
  color: #fff;
}

.anchorText:hover .anchorImage {
  visibility: visible;
}

hr {
  display: block;
  height: 1px;
  border: 0;
  border-top: 1px solid #efefef;
  margin: 1em 0;
  padding: 0;
}

/* Text and background color for dark mode */
@media (prefers-color-scheme: dark) {
  body {
    color: #e6edf3;
    background-color: #0d1117;
  }

  h1 {
    border-color: rgba(48, 54, 61, 0.7);
  }

  h2 {
    border-color: rgba(48, 54, 61, 0.7);
  }

  hr {
    border-color: rgba(48, 54, 61, 0.7);
  }

  div.sourceCode {
    background-color: #161b22;
  }

  code {
    background-color: #161b22;
  }

  a {
    color: #4493f8;
  }

  a:visited {
    color: #2f66ad;
  }

  table {
    border-color: rgba(48, 54, 61, 0.7);
  }

  td {
    border-color: rgba(48, 54, 61, 0.7);
  }

  tr:nth-child(even) {
    background-color: #161b22;
  }

  .wikitopbanner {
    background-color: #263040;
  }

  .wikibottombanner {
    background-color: #263040;
  }

  .anchorText:hover .anchorImage {
    filter: invert(100%);
  }
}

@media print {
  body {
    font-size: 12px;
  }

  table {
    font-size: inherit;
  }

  a:visited {
    color: #0969da;
  }

  .wikitopbanner,
  .anchorText,
  .wikibottombanner {
    display: none;
  }
}

/** additional (& overrides) for examples */
header {
  background-color: #efefef;
  padding: 10px;
  font-size: 2rem;
}

header > a,
header > a:hover,
header > a:visited {
  color: inherit;
  text-decoration: none;
}

.breadcrumb {
  padding: 0.75rem 0.75rem;
}

.breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li:not(:last-child)::after {
  display: inline-block;
  margin: 0 0.25rem;
  content: "»";
}

.list {
  display: flex;
  flex-flow: row wrap;
  gap: 24px;
}

.list > a > div {
  width: 200px;
  border: 5px solid #efefef;
  border-radius: 5px;
  background: #efefef;

  display: flex;
  flex-flow: column nowrap;

  transition: border 0.25s;
}

.list > a > div:hover {
  border-color: #064998;
}

.list > a > div > img {
  width: 100%;
  border-radius: 5px;
}

.list > a > div > div {
  text-align: center;
}

.list > a,
.list > a:visited {
  display: block;
  color: inherit;
  text-decoration: none;
}
.list > a:hover {
  color: #0969da;
}

@media (prefers-color-scheme: dark) {
  header {
    background-color: #263040;
  }

  .breadcrumb li:not(:last-child)::after {
    color: #efefef;
  }

  .list > a > div {
    border-color: #333;
    background: #333;
  }
}

@media only screen and (max-width: 992px) {
  .list > a > div {
    width: 150px;
  }
}