amis/scss/components/_nav.scss

.#{$ns}Nav {
  list-style: none;
  user-select: none;
  margin: 0;
  padding: 0;

  .#{$ns}Nav-itemIcon {
    margin-right: $gap-xs;
  }

  &--tabs {
    border-bottom: $Tabs-borderWidth solid $Tabs-borderColor;

    .#{$ns}Nav-item {
      margin-bottom: -$Tabs-borderWidth;
      display: inline-block;

      > a {
        font-size: $Tabs-linkFontSize;
        display: block;
        outline: none;
        border: $Tabs-borderWidth solid transparent;
        border-top-left-radius: $Tabs-borderRadius;
        border-top-right-radius: $Tabs-borderRadius;
        color: $Tabs-color;
        text-decoration: none;
        margin-right: px2rem(2px);
        padding: $gap-sm $gap-base;
        cursor: pointer;
      }

      &:hover > a,
      > a:focus {
        border-color: $Tabs-onHover-borderColor;
        text-decoration: none;
      }

      &.disabled > a,
      &.is-disabled > a {
        color: $Tabs-onDisabled-color;
        background-color: transparent;
        border-color: transparent;
        pointer-events: none;
      }

      &.active > a,
      &.is-active > a {
        color: $Tabs-onActive-color;
        background-color: $Tabs-onActive-bg;
        border-color: $Tabs-onActive-borderColor;
        border-bottom-color: $Tabs-content-bg;
      }
    }
  }

  &--stacked {
    .#{$ns}Nav-item {
      position: relative;

      > a {
        display: block;
        outline: none;
        color: $Nav-item-color;
        text-decoration: none;
        padding: $gap-sm $gap-base;
        cursor: pointer;
        background-color: $Nav-item-bg;
        border-radius: $Nav-item-borderRadius;
      }

      &:hover > a,
      > a:focus {
        border-color: $Nav-item-onHover-color;
        text-decoration: none;
        background-color: $Nav-item-onHover-bg;
      }

      &.disabled > a,
      &.is-disabled > a {
        color: $Nav-item-onDisabled-color;
        background-color: transparent;
        pointer-events: none;
      }

      &.active > a,
      &.is-active > a {
        color: $Nav-item-onActive-color;
        background-color: $Nav-item-onActive-bg;
        border-left: $Nav-item-onActive-borderLeft;
        padding-left: px2rem(12px);
      }

      &.is-unfolded {
        .#{$ns}Nav-itemToggler {
          transform: rotate(180deg) scale(0.8);
        }

        .#{$ns}Nav-subItems {
          display: block;
        }
      }

      .#{$ns}Nav-itemToggler {
        position: absolute;
        width: px2rem(30px);
        height: px2rem(30px);
        text-align: center;
        line-height: px2rem(30px);
        vertical-align: middle;
        top: px2rem(4px);
        right: px2rem(2px);
        cursor: pointer;
        transform: scale(0.8);
        transition: transform 0.3s;

        > svg {
          width: 10px;
          height: 10px;
          top: 0;
        }
      }

      .#{$ns}Nav-subItems {
        display: none;
        padding-left: 0;
        list-style: none;
      }

      .#{$ns}Nav-item {
        font-size: $Nav-subItem-fontSize;

        a:before {
          content: '';
          display: inline-block;
          width: px2rem(4px);
          height: px2rem(4px);
          background-color: #ccc;
          border-radius: px2rem(500px);
          margin-right: px2rem(8px);
          vertical-align: middle;
        }

        &.active > a:before,
        &.is-active > a:before {
          background-color: $Nav-subItem-onActiveBeforeBg;
        }
      }
    }
  }
}