bigcapital/client/src/style/views/Sidebar.scss

$sidebar-background: #01194e;
$sidebar-text-color: #fff;
$sidebar-width: 220px;
$sidebar-menu-item-color: rgba(255, 255, 255, 0.85);
$sidebar-popover-submenu-bg: rgb(1, 20, 62);
$sidebar-menu-label-color: rgba(255, 255, 255, 0.5);
$sidebar-submenu-item-color: rgba(255, 255, 255, 0.55);
$sidebar-submenu-item-hover-color: rgba(255, 255, 255, 0.8);
$sidebar-logo-opacity: 0.55;
$sidebar-submenu-item-bg-color: #01287d;

.sidebar {
  background: $sidebar-background;
  width: $sidebar-width;
  color: $sidebar-text-color;
  position: fixed;
  height: 100%;
  z-index: $sidebar-zindex;

  .ScrollbarsCustom-Track {
    &.ScrollbarsCustom-TrackY,
    &.ScrollbarsCustom-TrackX{
      background: rgba(0, 0, 0, 0);
    }
  }
  .ScrollbarsCustom-Thumb{
    &.ScrollbarsCustom-ThumbX,
    &.ScrollbarsCustom-ThumbY {
      background: rgba(0, 0, 0, 0);
    }
  }

  &:hover {
    .ScrollbarsCustom-Thumb{
      &.ScrollbarsCustom-ThumbX,
      &.ScrollbarsCustom-ThumbY {
        background: rgba(255, 255, 255, 0.25);
      }      
    }
  }
  &__head{
    padding: 16px 12px;
   
    &-logo{
      position: relative;
      top: 2px;

      svg{
        opacity: $sidebar-logo-opacity;
      }
    }
  }

  &__scroll-wrapper{
    height: 100%;
  }

  &-menu {
    background: transparent;
    padding: 0;
    min-width: $sidebar-width;
    border-radius: 0;
    padding-bottom: 2rem;

    .#{$ns}-menu-item {
      color: $sidebar-menu-item-color;
      border-radius: 0;
      padding: 8px 16px;
      font-size: 15px;
      font-weight: 400;

      &:hover,
      &.bp3-active {
        background: $sidebar-submenu-item-bg-color;
        color: $sidebar-menu-item-color;
      }
      &:focus,
      &:active {
        background: #01143e;
      }

      > .#{$ns}-icon {
        color: #767b9b;
        margin-right: 16px;
        margin-top: 0;
      }
      > .#{$ns}-icon-caret-right {
        margin-right: -4px;
        margin-top: 3px;
        color: rgba(255, 255, 255, 0.2);
      }
      &-label{
        display: block;
        color: $sidebar-menu-label-color;
        font-size: 12px;
        padding: 6px 16px;
        margin-top: 4px;
      }
    }

    .#{$ns}-submenu {
      .#{$ns}-collapse {

        &-body {
          background-color: rgb(11, 34, 85);
          padding-bottom: 6px;
          padding-top: 6px;
        }

        .#{$ns}-menu-item {
          padding: 7px 16px 7px 18px;
          font-size: 15px;
          color: $sidebar-submenu-item-color;

          &:hover,
          &.bp3-active {
            background: transparent;
            color: $sidebar-submenu-item-hover-color;
          }

          &.bp3-active{
            font-weight: 500;
          }
        }
      }
      .#{$ns}-popover {
        padding: 0;

        &-content {
          box-shadow: 0 0 0;
        }
      }
    }
    .#{$ns}-popover-target.#{$ns}-popover-open .#{$ns}-menu-item {
      color: $sidebar-menu-item-color;
    }
    .#{$ns}-menu-divider {
      border-top-color: rgba(255, 255, 255, 0.125);
      color: #6b708c;
      margin: 4px 0;
    }
    .#{$ns}-menu-spacer{
      margin: 4px 0;
      height: 1px;
    }
  }

  &--mini-sidebar{
    white-space: nowrap;
    width: 50px;

    // Hide text of bigcapital logo.
    .sidebar__head-logo{

      .bp3-icon-bigcapital{
        path{
          transition: opacity 0.3s ease-in-out;
        }
        path:not(.path-1):not(.path-2) {
          opacity: 0;
        }
      }
    }

    .sidebar__menu{
      transition: opacity 0.3s ease-in-out;
      opacity: 0;
    }

    .sidebar__scroll-wrapper{
      background: $sidebar-background;
      transition: min-width 0.15s ease-in-out;
      min-width: 50px;

      &:hover{
        min-width: $sidebar-width;

        .sidebar__head-logo{

          .bp3-icon-bigcapital{
            path:not(.path-1):not(.path-2) {
              opacity: 1;
            }
          }
        }
        .sidebar__menu{
          opacity: 1;
        }
      }      
    }
  }
}