src/style.scss

$anim-duration: 0.3s;

.code {
  padding-bottom: 40px;
  .editor {
    height: 100%;
  }
  .bottom-bar {
    height: 40px;
    background: var(--darker-background);
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    font-size: 0;
    border-top: 1px solid var(--border);
    .btn {
      cursor: pointer;
      text-align: center;
      color: var(--foreground);
      font-size: 14px;
      line-height: 40px;
      width: 25%;
      border-right: 1px solid var(--border);
      display: inline-block;
      transition: background-color $anim-duration, color $anim-duration;
      &:active {
        background: var(--highlight);
        color: var(--select-foreground);
      }
      &.active {
        color: var(--select-foreground);
      }
    }
  }
}