Vulcan/packages/telescope-theme-base/lib/client/scss/specific/_dropdown.scss

// ------------------------------------ Base ------------------------------------ //
.dropdown{
  .dropdown-item{
    padding: 5px;
    margin: 0;
    a{
      font-size:14px;
    }
  }
  .menu-label{
    display: block;
  }
  .menu-description{
    display: block;
    font-weight: normal;
    font-size: 12px;
    margin-top: 2px;
    color: $medium-text;
  }
  .item-admin{
    .menu-label:after{
      content: "[A]";
      font-size: 10px;
      color: $red;
      display: inline-block;
      margin-left: 3px;
    }
  }
  .item-active{
    .dark-bg &, .medium-dark-bg &{
      background: white(0.1);
    }
    .light-bg &, .medium-light-bg &, white-bg &{
      background: black(0.1);
    }
  }
  .item-active.item-never-active{
    background: none;
  }
  .dropdown-top-label{
    cursor: pointer;
  }
}
// ------------------------------------ List ------------------------------------ //

.dropdown-list{
  .show-more{
    display: none;
  }
}
// ------------------------------------ Hover ------------------------------------ //

.dropdown-hover{
  position:relative;
  &.dropdown-has-items{
    .dropdown-top-level{
      cursor: pointer;
      &:after{
        display:inline-block;
        position:relative;
        top:-1px;
        margin-left:4px;
        content:"▼";
        font-size:8px;
      }
    }
    &:hover{
      .dropdown-menu{
        display:block;
      }
    }
  }
  .dropdown-menu{
    display:none;
    top:10px;
    left:10px;
    position:absolute;
    padding-top:20px;
    z-index: 10000;
    &, a, a:link, a:visited{
      color: $text;
    }
    a.button{
      color: white;
    }
    .dropdown-contents{
      background:white;
      padding: 10px;
      min-width:180px;
      border-radius: 3px;
      box-shadow: 0 1px 3px black(0.35);
      list-style-type: none;
    }
  }
  .show-more{
    display: none;
  }
}

// ------------------------------------ Accordion ------------------------------------ //

.dropdown-accordion{
  .dropdown-top-level{
    cursor: default;
    display: block;
    padding: 5px;
    position: relative;
    /* note: we use a pseudo-element for the border so we can control the opacity indepdently from the color */
    &:after{
      content: " ";
      display: block;
      position: absolute;
      width: 100%;
      height: 1px;
      background: currentColor;
      bottom: 0px;
      left: 0px;
      opacity: 0.5;
    }
  }
  /* ------- Show More Button ------- */
  .show-more{
    // border-top: 1px solid #ccc;
    position: relative;
    /* note: we use a pseudo-element for the border so we can control the opacity indepdently from the color */
    &:before{
      content: " ";
      display: block;
      position: absolute;
      width: 100%;
      height: 1px;
      background: currentColor;
      top: 0px;
      left: 0px;
      opacity: 0.5;
    }
    padding: 8px 0;
    display: none;
    text-align: center;
    .icon{
      display: block;
      height: 20px;
      width: 20px;
      opacity: 0.5;
      margin: 0 auto;
    }
    &:hover{
      background: white(0.2);
      .show-more-icon{
        opacity: 1;
      }
    }
    .icon-close{
      display: none;
    }
  }
  &.dropdown-long .show-more{
    display: block; // only show the "show more" button if the dropdown has more than three items
  }
  &.dropdown-open{
    .icon-close{
      display: block;
    }
    .icon-open{
      display: none;
    }    
  }

  /* expand/collapse animation */
  .dropdown-contents{
    max-height: 93px;
    overflow: hidden;
    @include animate(max-height);
  }
  &.dropdown-open .dropdown-contents{
    max-height: 999px !important;
  }
}