$treePrefixCls: ui-tree;

.#{$treePrefixCls} {
  margin: 0;
  padding: 5px;

  li {
    padding: 3px 0;
    margin: 0;
    list-style: none;
    white-space: nowrap;
    outline: 0;

    .collapse {
      overflow: hidden;
      display: block;
    }

    .collapse-active {
      transition: height 0.2s ease-out;
    }

    ul {
      margin: 0;
      padding: 0 0 0 18px;
    }

    .#{$treePrefixCls}-node-content-wrapper {
      display: inline-block;
      cursor: pointer;
      text-decoration: none;
      vertical-align: top;
    }

    span {
      &.#{$treePrefixCls}-switcher {
        width: 24px;
        height: 24px;
        line-height: 24px;
        display: inline-block;
        vertical-align: top;
        cursor: pointer;

        &.#{$treePrefixCls}-switcher-open,
        &.#{$treePrefixCls}-switcher-close {
          &:after {
            width: 0;
            height: 0;
            content: '';
            display: inline-block;
            border: 4px solid #000;
            border-color: rgba(0, 0, 0, 0.65) transparent transparent;
            transition: transform .3s;
          }
        }

        &.#{$treePrefixCls}-switcher-open:after {
          transform: translate(8px, 0) rotate(0deg);
        }

        &.#{$treePrefixCls}-switcher-close:after {
          transform: translate(10px, -2px) rotate(-90deg);
        }

        &.#{$treePrefixCls}-switcher-noop {
          cursor: default;
        }
      }

      &.#{$treePrefixCls}-checkbox {
        width: 20px;
        height: 24px;
        line-height: 24px;
        display: inline-block;
        vertical-align: top;
        cursor: pointer;
        text-align: center;
      }

      &.#{$treePrefixCls}-node-content-wrapper {
        line-height: 24px;
        height: 24px;
        display: inline-block;
        color: rgba(0, 0, 0, 0.65);
        font-size: 12px;
      }
    }

    &-child-tree {
      display: none;

      &-open {
        display: block;
      }
    }

    &-treenode-disabled {
      > span:not(.#{$treePrefixCls}-switcher),
      > a,
      > a span {
        color: #767676;
        cursor: not-allowed;
      }
    }
  }
}