src/css/Sidebar.scss

#sidebar {
  border-radius: 4px;
  border: 1px solid $sidebar-border-color;
}

.Sidebar__container {
  font-size: $font-size-small;
}

.Sidebar__content {
  overflow-y: scroll;
}

.Sidebar__section {
  display: flex;
  flex-direction: column;
  background-color: white;
  max-height: 100%;
  overflow: hidden;
  font-size: $font-size-base;
}

.Sidebar__section--is-closed {
  background: none;
  border: 0;
}

.Sidebar__container + .Sidebar__container {
  margin-top: $gutter-width;
}

.Sidebar__header-container {
  position: relative;
  padding: $gutter-width;
  & + & {
    border-top: 1px solid $sidebar-border-color;
  }
}

.Sidebar__header-bottom {
  display: flex;
  margin-top: $gutter-width;
}

.Sidebar__header-contact {
  margin-left: auto;
  font-size: $font-size-small;
  max-width: 130px;
}

.Sidebar__header {
  display: flex;
  align-items: center;
  position: relative;
  flex-shrink: 0.2;
  font-weight: bold;
  justify-content: space-between;
}

.Sidebar__header-button-container {
  position: relative;
}

.Sidebar__header-change-indicator {
  position: absolute;
  right: -4px;
  bottom: 22px;
  width: 10px;
  height: 10px;
  background-image: radial-gradient(closest-corner at 4px 4px,
  $match-color 0%, $sidebar-highlight-color 100%);
  border-radius: 50%;
  display: inline-block;
  z-index: 1;
}

.Sidebar__filter-toggle {
  display: inline-block;
  padding: 1px 2px;
  vertical-align: middle;
  border-radius: $base-border-radius;
  min-width: 30px;
  font-weight: bold;
  height: fit-content;
  margin-right: calc($gutter-width / 2);
  font-size: $font-size-base;
  cursor: pointer;
  &:focus {
    outline: none;
  }
  &:disabled {
    cursor: not-allowed;
  }
}

.Sidebar__header-sort {
  font-weight: normal;
}

.Sidebar__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.Sidebar__awaiting-match {
  padding: $gutter-width;
  color: gray;
}

.Sidebar__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.Sidebar__list-item + .Sidebar__list-item {
  border-top: 1px solid $sidebar-border-color;
}

.LoadingBar {
  position: absolute;
  height: 3px;
  left: 0;
  bottom: 0;
  background-color: $sidebar-highlight-color;
  width: 100%;
  transition: width 0.3s, opacity 0.3s;
}

.LoadingBar__animated-background {
  animation-duration: 1.75s;
  animation-fill-mode: forwards;
  animation-iteration-count: infinite;
  animation-name: placeHolderShimmer;
  animation-timing-function: linear;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0) 10%,
    rgba(255, 255, 255, 0.5) 15%,
    rgba(255, 255, 255, 0) 20%
  );
  background-size: 800px 104px;
  height: 100%;
  position: relative;
}

@keyframes placeHolderShimmer {
  0% {
    background-position: -200px 0;
  }
  100% {
    background-position: 400px 0;
  }
}