.dropdown {
  position: absolute;
  top: 0;
  right: 0;
}

.dropdown-menu {
  z-index: 1000;
  box-shadow: 2px 2px 30px rgba(black, 0.3);

  @include susy-breakpoint($mobile) {
    position: fixed;
    top: 75px;
    right: 0;
    left: 0;
  }

  @include susy-breakpoint($tablet) {
    position: absolute;
    left: 0;
    right: 0;
    margin: 20px 0;
    padding: 3px 0 0 0;
    background: $white;

    // tip
    &:before {
      display: block;
      width: 20px;
      height: 20px;
      position: absolute;
      left: 50%;
      top: -8px;
      margin-left: -10px;
      transform: rotate(45deg);
      background: $white;
      content: '';
    }
  }

  .dropdown-menu-backdrop {
    display: none;
    position: fixed;
    top: 75px;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    background: rgba(black, 0.5);

    @include susy-breakpoint($mobile) {
      display: block;
    }
  }

  ul {
    display: block;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  li {
    display: block;
    position: relative;
    z-index: 1;
    border-bottom: 1px solid $lightGray;
  }

  a,
  button {
    display: inline-block;
    padding: 10px 15px;
    color: $charcoal;
    line-height: 1.6em;
    border: none;
    background: transparent;
    text-decoration: none;
    background: $white;
    width: 100%;
    text-align: left;

    &:hover,
    &:focus {
      text-decoration: underline;
    }
  }
}