.scrollbar {
  position: relative;
  overflow: hidden;

  &__wrap {
    height: 100%;
    overflow: scroll;

    &--hidden-default {
      scrollbar-width: none;

      &::-webkit-scrollbar {
        width: 0;
        height: 0;
      }
    }
  }

  &__thumb {
    position: relative;
    display: block;
    width: 0;
    height: 0;
    cursor: pointer;
    background-color: rgba(144, 147, 153, 0.3);
    border-radius: inherit;
    transition: 0.3s background-color;

    &:hover {
      background-color: rgba(144, 147, 153, 0.5);
    }
  }

  &__bar {
    position: absolute;
    right: 2px;
    bottom: 2px;
    z-index: 1;
    border-radius: 4px;
    opacity: 0;
    -webkit-transition: opacity 80ms ease;
    transition: opacity 80ms ease;

    &.is-vertical {
      top: 2px;
      width: 5px;

      & > div {
        width: 100%;
      }
    }

    &.is-horizontal {
      left: 2px;
      height: 5px;

      & > div {
        height: 100%;
      }
    }
  }
}

.scrollbar:active > .scrollbar__bar,
.scrollbar:focus > .scrollbar__bar,
.scrollbar:hover > .scrollbar__bar {
  opacity: 1;
  transition: opacity 180ms ease;
}
