wagtail/client/src/components/Explorer/Explorer.scss

$c-explorer-bg: #4c4e4d;
$c-explorer-bg-dark: $nav-grey-1;
$c-explorer-bg-active: rgba(0, 0, 0, 0.425);
$c-explorer-secondary: #a5a5a5;
$c-explorer-easing: cubic-bezier(0.075, 0.82, 0.165, 1);
$menu-footer-height: 50px;

@use 'sass:map';

@import 'ExplorerItem';

.explorer__wrapper,
.explorer__wrapper * {
  box-sizing: border-box;
}

.explorer__wrapper {
  display: flex;
  flex: 1;
}

.explorer {
  width: 100%;
  display: flex;
  flex-direction: column;

  @include media-breakpoint-up(sm) {
    width: 485px;
    height: 100vh;
    position: fixed;
    z-index: 500;
    // Remove once we drop support for Safari 13.
    // stylelint-disable-next-line property-disallowed-list
    left: $menu-width;
    inset-inline-start: $menu-width;
  }

  *:focus {
    @include show-focus-outline-inside;
  }
}

.c-explorer {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: $c-explorer-bg;

  @include media-breakpoint-up(sm) {
    box-shadow: 2px 2px 5px $c-explorer-bg-active;
  }
}

.c-explorer > .c-transition-group {
  display: flex;
  flex-direction: column;
  height: 100%;
  z-index: 150;
}

.c-explorer__close {
  padding: 1em;
  color: $c-explorer-secondary;
  border-bottom: 1px solid rgba(200, 200, 200, 0.1);
  cursor: pointer;
  display: none;

  &:focus {
    background-color: $c-explorer-bg-active;
    color: $color-white;
  }

  // Overrides for default link hover.
  &:hover {
    color: $c-explorer-secondary;
  }

  @include media-breakpoint-down(xs) {
    .explorer-open & {
      display: block;
    }
  }
}

.c-explorer__drawer {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.c-explorer__header {
  display: block;
  background-color: $c-explorer-bg-dark;
  border-bottom: 1px solid $c-explorer-bg-dark;
  color: $color-white;
}

.c-explorer__header__title {
  color: inherit;

  &:focus {
    background-color: $c-explorer-bg-active;
    color: $color-white;
  }

  // Overrides for default link hover.
  &:hover {
    color: $color-white;
  }

  @include hover {
    background-color: $c-explorer-bg-active;
  }
}

.c-explorer__header__title__inner {
  width: 70%;
  float: left;
  padding: 1em 0.75em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;

  .icon {
    color: $c-explorer-secondary;
    margin-inline-end: 0.25rem;
    font-size: 1rem;
  }

  .icon--explorer-header {
    width: 1.25em;
    height: 1.25em;
    margin-inline-end: 0.25rem;
    vertical-align: text-top;
    color: $c-explorer-secondary;
  }

  @include media-breakpoint-up(sm) {
    padding: 1em 1.5em;
  }
}

.c-explorer__header__select {
  $margin: 10px;
  position: relative;

  > select {
    width: calc(30% - #{$margin * 2});
    height: calc(100% - #{$margin * 2});
    margin-top: $margin;
    margin-inline-end: $margin;
    float: right;
    padding: 0;
    padding-inline-start: 10px;

    background-color: $c-explorer-bg-dark;
    border-radius: 0;
    border-color: #4c4e4d;
    color: $color-white;

    &:disabled {
      border: 0;
    }

    &:hover:enabled {
      cursor: pointer;
    }

    &:hover:disabled {
      color: inherit;
      background-color: inherit;
      cursor: inherit;
    }
  }

  // Add select arrow back on browsers where native ui has been removed
  &-icon {
    position: absolute;
    // Remove once we drop support for Safari 13.
    // stylelint-disable-next-line property-disallowed-list
    right: 1rem;
    inset-inline-end: 1rem;
    top: 1rem;
    width: 1.25rem;
    height: 1.25rem;
    color: $color-grey-3;

    .ie & {
      display: none;
    }
  }
}

.c-explorer__placeholder {
  padding: 1em;
  color: $color-white;

  @include media-breakpoint-up(sm) {
    padding: 1em 1.75em;
  }
}

.c-explorer__see-more {
  display: block;
  padding: 1em;
  background: rgba(0, 0, 0, 0.3);
  color: $color-white;

  &:focus {
    color: $c-explorer-secondary;
    background: $c-explorer-bg-active;
  }

  // Overrides for default link hover.
  &:hover {
    color: $color-white;
  }

  @include hover {
    background: $c-explorer-bg-active;
  }

  @include media-breakpoint-up(sm) {
    padding: 1em 1.75em;
    height: $menu-footer-height;
  }
}