doc/themes/learn4/scss/theme/_simplebar.scss

[data-simplebar] {
    position: relative;
    flex-direction: column;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-content: flex-start;
    align-items: flex-start;
    width: inherit;
    height: inherit;
    max-width: inherit;
    max-height: inherit;
}

.simplebar-wrapper {
    overflow: hidden;
    width: inherit;
    height: inherit;
    max-width: inherit;
    max-height: inherit;
}

.simplebar-mask {
    direction: inherit;
    position: absolute;
    overflow: hidden;
    padding: 0;
    margin: 0;
    left: 0;
    top: 0;
    bottom: 0;
    right: 0;
    width: auto !important;
    height: auto !important;
    z-index: 0;
}

.simplebar-offset {
    direction: inherit !important;
    box-sizing: inherit !important;
    resize: none !important;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    padding: 0;
    margin: 0;
    -webkit-overflow-scrolling: touch;
}

.simplebar-content-wrapper {
    direction: inherit;
    box-sizing: border-box !important;
    position: relative;
    display: block;
    height: 100%; /* Required for horizontal native scrollbar to not appear if parent is taller than natural height */
    width: auto;
    visibility: visible;
    overflow: auto; /* Scroll on this element otherwise element can't have a padding applied properly */
    max-width: 100%; /* Not required for horizontal scroll to trigger */
    max-height: 100%; /* Needed for vertical scroll to trigger */
}

.simplebar-content:before,
.simplebar-content:after {
    content: " ";
    display: table;
}

.simplebar-placeholder {
    max-height: 100%;
    max-width: 100%;
    width: 100%;
    pointer-events: none;
}

.simplebar-height-auto-observer-wrapper {
    box-sizing: inherit !important;
    height: 100%;
    width: inherit;
    max-width: 1px;
    position: relative;
    float: left;
    max-height: 1px;
    overflow: hidden;
    z-index: -1;
    padding: 0;
    margin: 0;
    pointer-events: none;
    flex-grow: inherit;
    flex-shrink: 0;
    flex-basis: 0;
}

.simplebar-height-auto-observer {
    box-sizing: inherit;
    display: block;
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    height: 1000%;
    width: 1000%;
    min-height: 1px;
    min-width: 1px;
    overflow: hidden;
    pointer-events: none;
    z-index: -1;
}

.simplebar-track {
    z-index: 1;
    position: absolute;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

[data-simplebar].simplebar-dragging .simplebar-track {
    pointer-events: all;
}

.simplebar-scrollbar {
    position: absolute;
    right: 2px;
    width: 7px;
    min-height: 10px;
}

.simplebar-scrollbar:before {
    position: absolute;
    content: "";
    background: rgba(#fff, 0.5);
    border-radius: 7px;
    left: 0;
    right: 0;
    opacity: 0;
    transition: opacity 0.2s linear;
}

.simplebar-track .simplebar-scrollbar.simplebar-visible:before {
    /* When hovered, remove all transitions from drag handle */
    opacity: 0.5;
    transition: opacity 0s linear;
}

.simplebar-track.simplebar-vertical {
    top: 0;
    width: 11px;
}

.simplebar-track.simplebar-vertical .simplebar-scrollbar:before {
    top: 2px;
    bottom: 2px;
}

.simplebar-track.simplebar-horizontal {
    left: 0;
    height: 11px;
}

.simplebar-track.simplebar-horizontal .simplebar-scrollbar:before {
    height: 100%;
    left: 2px;
    right: 2px;
}

.simplebar-track.simplebar-horizontal .simplebar-scrollbar {
    right: auto;
    left: 0;
    top: 2px;
    height: 7px;
    min-height: 0;
    min-width: 10px;
    width: auto;
}

/* Rtl support */
[data-simplebar-direction="rtl"] .simplebar-track.simplebar-vertical {
    right: auto;
    left: 0;
}

.hs-dummy-scrollbar-size {
    direction: rtl;
    position: fixed;
    opacity: 0;
    visibility: hidden;
    height: 500px;
    width: 500px;
    overflow-y: hidden;
    overflow-x: scroll;
}