@ms-track-size: var(--ms-track-size, 16px);
@ms-track-gutter: var(--ms-track-gutter, 2px);

.ms-track {
  position: absolute;
  background: transparent;
  opacity: 0;
  transition:
    background-color 0.3s ease-out,
    border 0.3s ease-out,
    opacity 0.3s ease-out;
  user-select: none;

  &.ms-track-show {
    opacity: 1;
  }

  &.ms-y {
    top: 0;
    right: 0;
    width: @ms-track-size;
    height: 100%;
    border-left: 1px solid transparent;

    &.ms-active,
    &:hover {
      .ms-thumb {
        width: calc(@ms-track-size - @ms-track-gutter * 2);
      }
    }

    .ms-thumb {
      top: 0;
      right: @ms-track-gutter;
      width: 6px;
      transition: width 0.3s ease-out;

      &:hover {
        width: calc(@ms-track-size - @ms-track-gutter * 2);
      }

      &:after {
        position: absolute;
        top: 0;
        right: calc(@ms-track-gutter * -1);
        width: @ms-track-size;
        height: 100%;
        content: '';
      }
    }
  }

  &.ms-x {
    bottom: 0;
    left: 0;
    width: 100%;
    height: @ms-track-size;
    border-top: 1px solid transparent;

    &.ms-active,
    &:hover {
      .ms-thumb {
        height: calc(@ms-track-size - @ms-track-gutter * 2);
      }
    }

    .ms-thumb {
      bottom: @ms-track-gutter;
      left: 0;
      height: 6px;
      transition: height 0.3s ease-out;

      &:hover {
        width: calc(@ms-track-size - @ms-track-gutter * 2);
      }

      &:after {
        position: absolute;
        bottom: calc(@ms-track-gutter * -1);
        left: 0;
        width: 100%;
        height: @ms-track-size;
        content: '';
      }
    }
  }

  &.ms-active,
  &:hover {
    background: var(--ms-track-background);
    border-color: var(--ms-track-border-color);
    opacity: 1;
  }

  &.ms-active {
    z-index: 20;
  }

  .ms-thumb {
    position: absolute;
    background: var(--ms-thumb-color);
    border-radius: 6px;
    user-select: none;
  }
}