fuse-angular/src/@fuse/styles/overrides/perfect-scrollbar.scss

/* ----------------------------------------------------------------------------------------------------- */
/*  @ Perfect scrollbar overrides
/* ----------------------------------------------------------------------------------------------------- */
.ps {
    position: relative;

    &:hover,
    &.ps--focus,
    &.ps--scrolling-x,
    &.ps--scrolling-y {

        > .ps__rail-x,
        > .ps__rail-y {
            opacity: 1;
        }
    }

    > .ps__rail-x,
    > .ps__rail-y {
        z-index: 99999;
    }

    > .ps__rail-x {
        height: 14px;
        background: transparent !important;
        transition: none !important;

        &:hover,
        &:focus,
        &.ps--clicking {
            opacity: 1;

            .ps__thumb-x {
                height: 10px;
            }
        }

        .ps__thumb-x {
            background: rgba(0, 0, 0, 0.5);
            box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.15);
            height: 6px;
            transition: height 225ms cubic-bezier(0.25, 0.8, 0.25, 1);
        }
    }

    > .ps__rail-y {
        width: 14px;
        background: transparent !important;
        transition: none !important;
        left: auto !important;

        &:hover,
        &:focus,
        &.ps--clicking {
            opacity: 1;

            .ps__thumb-y {
                width: 10px;
            }
        }

        .ps__thumb-y {
            background: rgba(0, 0, 0, 0.5);
            box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.15);
            width: 6px;
            transition: width 225ms cubic-bezier(0.25, 0.8, 0.25, 1);
        }
    }
}