.side-collapsed() {
  @{menu-item} {
    i {
      margin-right: 0;
      + span {
        display: none;
      }
    } 
  }
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
  &::-webkit-scrollbar {
    width: 5px;
  }
  &::-webkit-scrollbar-thumb {
    background: transparent; 
  }
  &::-webkit-scrollbar-track {
    background: transparent;
  }
  &:hover {
    scrollbar-color: fade(@color-white, 50%) transparent;
    &::-webkit-scrollbar-thumb {
      background: fade(@color-white, 50%); 
    }
  }
}

.side-expanded() {
}

.side-expanded-full() {
}

.side-hovered() {
}

.side-focused() {

}

.side-open-style() {
  width: @side-collapse-width * 0.66666;
  height: @side-collapse-width * 0.66666;
  line-height: @side-collapse-width * 0.66666;
  text-align: center;
  cursor: pointer;
  border-radius: 100%;
  margin: 0.4rem;
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.2);
  background-color: @color-primary;
  i {
    color: @color-white;
  }
}

.side-open-left-style() {
  bottom: 0;
  left: 0;
  margin: 0 0 1rem 1rem;
}
.side-open-right-style() {
  top: 0;
  right: 0;
  margin: 0 1rem 1rem 0;
}
.side-open-top-style() {
  top: 0;
  left: 0;
}
.side-open-bottom-style() {
  bottom: 0;
  left: 0;
}

& when(@include-core-layout-side = true) {
  .@{side-backdrop} {
    background-color: @side-backdrop-color;
    opacity: @side-backdrop-opacity;
  }
  .@{side-close} {
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    font-size: 1.4rem;
    cursor: pointer;
  }

  @{side} {
    background-color: darken(@color-primary, 10);
    color: #fff;
    &.@{side-top}, &.@{side-bottom} {
      .@{side-close} {
        top: 0.85rem;
      }
    }
    @{menu-item} {
      i {
        font-size: 1.4rem;
        margin-right: 0.5em;
        margin-left: 0.1em;
      }
    }
  }
}