docs/_sass/main.scss

// Styles for GoogleTest docs website on GitHub Pages.
// Color variables are defined in
// https://github.com/pages-themes/primer/tree/master/_sass/primer-support/lib/variables

$sidebar-width: 260px;

body {
  display: flex;
  margin: 0;
}

.sidebar {
  background: $black;
  color: $text-white;
  flex-shrink: 0;
  height: 100vh;
  overflow: auto;
  position: sticky;
  top: 0;
  width: $sidebar-width;
}

.sidebar h1 {
  font-size: 1.5em;
}

.sidebar h2 {
  color: $gray-light;
  font-size: 0.8em;
  font-weight: normal;
  margin-bottom: 0.8em;
  padding-left: 2.5em;
  text-transform: uppercase;
}

.sidebar .header {
  background: $black;
  padding: 2em;
  position: sticky;
  top: 0;
  width: 100%;
}

.sidebar .header a {
  color: $text-white;
  text-decoration: none;
}

.sidebar .nav-toggle {
  display: none;
}

.sidebar .expander {
  cursor: pointer;
  display: none;
  height: 3em;
  position: absolute;
  right: 1em;
  top: 1.5em;
  width: 3em;
}

.sidebar .expander .arrow {
  border: solid white;
  border-width: 0 3px 3px 0;
  display: block;
  height: 0.7em;
  margin: 1em auto;
  transform: rotate(45deg);
  transition: transform 0.5s;
  width: 0.7em;
}

.sidebar nav {
  width: 100%;
}

.sidebar nav ul {
  list-style-type: none;
  margin-bottom: 1em;
  padding: 0;

  &:last-child {
    margin-bottom: 2em;
  }

  a {
   text-decoration: none;
  }

  li {
    color: $text-white;
    padding-left: 2em;
    text-decoration: none;
  }

  li.active {
    background: $border-gray-darker;
    font-weight: bold;
  }

  li:hover {
    background: $border-gray-darker;
  }
}

.main {
  width: calc(100% - #{$sidebar-width});
}

.main .main-inner {
  margin: 2em;
}

.main table th {
  text-align: left;
}

.main .callout {
  border-left: 0.25em solid white;
  padding: 1em;

  a {
    text-decoration: underline;
  }

  &.important {
    background-color: $bg-yellow-light;
    border-color: $bg-yellow;
    color: $black;
  }

  &.note {
    background-color: $bg-blue-light;
    border-color: $text-blue;
    color: $text-blue;
  }

  &.tip {
    background-color: $green-000;
    border-color: $green-700;
    color: $green-700;
  }

  &.warning {
    background-color: $red-000;
    border-color: $text-red;
    color: $text-red;
  }
}

.main .good pre {
  background-color: $bg-green-light;
}

.main .bad pre {
  background-color: $red-000;
}

@media all and (max-width: 768px) {
  body {
    flex-direction: column;
  }

  .sidebar {
    height: auto;
    position: relative;
    width: 100%;
  }

  .sidebar .expander {
    display: block;
  }

  .sidebar nav {
    height: 0;
    overflow: hidden;
  }

  .sidebar .nav-toggle:checked {
    & ~ nav {
      height: auto;
    }

    & + .expander .arrow {
      transform: rotate(-135deg);
    }
  }

  .main {
    width: 100%;
  }
}