@use 'sass:math';

.os-scrollbar {
  contain: strict;
  transition: opacity 0.3s, visibility 0.3s, top 0.3s, right 0.3s, bottom 0.3s, left 0.3s;
  pointer-events: none;
  position: absolute;
  opacity: 0;
  visibility: hidden;
}
body > .os-scrollbar {
  position: fixed;
  z-index: 99999;
}
.os-scrollbar-transitionless {
  transition: none;
}
.os-scrollbar-track {
  position: relative;
  direction: ltr !important;
  padding: 0 !important;
  border: none !important;
}
.os-scrollbar-handle {
  position: absolute;
}
.os-scrollbar-track,
.os-scrollbar-handle {
  pointer-events: none;
  width: 100%;
  height: 100%;
}
.os-scrollbar.os-scrollbar-track-interactive .os-scrollbar-track,
.os-scrollbar.os-scrollbar-handle-interactive .os-scrollbar-handle {
  pointer-events: auto;
  touch-action: none;
}
.os-scrollbar-horizontal {
  bottom: 0;
  left: 0;
}
.os-scrollbar-vertical {
  top: 0;
  right: 0;
}
.os-scrollbar-rtl.os-scrollbar-horizontal {
  right: 0;
}
.os-scrollbar-rtl.os-scrollbar-vertical {
  right: auto;
  left: 0;
}
.os-scrollbar-visible,
.os-scrollbar-interaction.os-scrollbar-visible {
  opacity: 1;
  visibility: visible;
}
.os-scrollbar-auto-hidden {
  opacity: 0;
  visibility: hidden;
}
.os-scrollbar-unusable,
.os-scrollbar-unusable *,
.os-scrollbar-wheel,
.os-scrollbar-wheel * {
  pointer-events: none !important;
}
.os-scrollbar-unusable .os-scrollbar-handle {
  opacity: 0 !important;
}
.os-scrollbar.os-scrollbar-horizontal.os-scrollbar-cornerless,
.os-scrollbar.os-scrollbar-horizontal.os-scrollbar-cornerless.os-scrollbar-rtl {
  left: 0;
  right: 0;
}
.os-scrollbar.os-scrollbar-vertical.os-scrollbar-cornerless,
.os-scrollbar.os-scrollbar-vertical.os-scrollbar-cornerless.os-scrollbar-rtl {
  top: 0;
  bottom: 0;
}

/* NONE THEME: */
[data-overlayscrollbars~='updating'] > .os-scrollbar,
.os-theme-none.os-scrollbar {
  display: none !important;
}
/* DARK & LIGHT THEME: */
.os-theme-dark.os-scrollbar-horizontal,
.os-theme-light.os-scrollbar-horizontal {
  right: 10px;
  height: 10px;
}
.os-theme-dark.os-scrollbar-vertical,
.os-theme-light.os-scrollbar-vertical {
  bottom: 10px;
  width: 10px;
}
.os-theme-dark.os-scrollbar-rtl.os-scrollbar-horizontal,
.os-theme-light.os-scrollbar-rtl.os-scrollbar-horizontal {
  left: 10px;
  right: 0;
}
.os-theme-dark.os-scrollbar,
.os-theme-light.os-scrollbar {
  padding: 2px;
  box-sizing: border-box;
  background: transparent;
}
.os-theme-dark.os-scrollbar-unusable,
.os-theme-light.os-scrollbar-unusable {
  background: transparent;
}
.os-theme-dark.os-scrollbar > .os-scrollbar-track,
.os-theme-light.os-scrollbar > .os-scrollbar-track {
  background: transparent;
}
.os-theme-dark.os-scrollbar-horizontal > .os-scrollbar-track > .os-scrollbar-handle,
.os-theme-light.os-scrollbar-horizontal > .os-scrollbar-track > .os-scrollbar-handle {
  min-width: 30px;
}
.os-theme-dark.os-scrollbar-vertical > .os-scrollbar-track > .os-scrollbar-handle,
.os-theme-light.os-scrollbar-vertical > .os-scrollbar-track > .os-scrollbar-handle {
  min-height: 30px;
}
.os-theme-dark.os-scrollbar-transition > .os-scrollbar-track > .os-scrollbar-handle,
.os-theme-light.os-scrollbar-transition > .os-scrollbar-track > .os-scrollbar-handle {
  transition: background-color 0.3s;
}
.os-theme-dark.os-scrollbar > .os-scrollbar-track > .os-scrollbar-handle,
.os-theme-light.os-scrollbar > .os-scrollbar-track > .os-scrollbar-handle,
.os-theme-dark.os-scrollbar > .os-scrollbar-track,
.os-theme-light.os-scrollbar > .os-scrollbar-track {
  border-radius: 10px;
}
.os-theme-dark.os-scrollbar > .os-scrollbar-track > .os-scrollbar-handle {
  background:var(--bm-scrollbar);
}
.os-theme-light.os-scrollbar > .os-scrollbar-track > .os-scrollbar-handle {
  background: rgba(255, 255, 255, 0.4);
}
.os-theme-dark.os-scrollbar:hover > .os-scrollbar-track > .os-scrollbar-handle {
  background: var(--bm-scrollbar-active);
}
.os-theme-light.os-scrollbar:hover > .os-scrollbar-track > .os-scrollbar-handle {
  background: rgba(255, 255, 255, 0.55);
}
.os-theme-dark.os-scrollbar > .os-scrollbar-track > .os-scrollbar-handle.active {
  background: var(--bm-scrollbar-focus);
}
.os-theme-light.os-scrollbar > .os-scrollbar-track > .os-scrollbar-handle.active {
  background: rgba(255, 255, 255, 0.7);
}
.os-theme-dark.os-scrollbar-horizontal .os-scrollbar-handle:before,
.os-theme-dark.os-scrollbar-vertical .os-scrollbar-handle:before,
.os-theme-light.os-scrollbar-horizontal .os-scrollbar-handle:before,
.os-theme-light.os-scrollbar-vertical .os-scrollbar-handle:before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: block;
}
.os-theme-dark.os-host-scrollbar-hidden > .os-scrollbar-handle:before {
  display: none;
}
.os-theme-dark.os-scrollbar-horizontal .os-scrollbar-handle:before,
.os-theme-light.os-scrollbar-horizontal .os-scrollbar-handle:before {
  top: -6px;
  bottom: -2px;
}
.os-theme-dark.os-scrollbar-vertical .os-scrollbar-handle:before,
.os-theme-light.os-scrollbar-vertical .os-scrollbar-handle:before {
  left: -6px;
  right: -2px;
}
.os-theme-dark.os-scrollbar-rtl.os-scrollbar-vertical .os-scrollbar-handle:before,
.os-theme-light.os-scrollbar-rtl.os-scrollbar-vertical .os-scrollbar-handle:before {
  right: -6px;
  left: -2px;
}

$inflate-margin: 133px;
$shrink-scale: 0.1;

.os-size-observer,
.os-size-observer-listener {
  direction: inherit;
  pointer-events: none;
  overflow: hidden;
  visibility: hidden;
  box-sizing: border-box;
}

.os-size-observer,
.os-size-observer-listener,
.os-size-observer-listener-item,
.os-size-observer-listener-item-final {
  writing-mode: horizontal-tb;
  position: absolute;
  left: 0;
  top: 0;
}

.os-size-observer {
  z-index: -1;
  contain: strict;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  padding: inherit;
  border: inherit;
  box-sizing: inherit;
  margin: -$inflate-margin;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transform: scale($shrink-scale);

  &::before {
    content: '';
    flex: none;
    box-sizing: inherit;
    padding: 10px;
    width: 10px;
    height: 10px;
  }
}

.os-size-observer-appear {
  // "forwards" is important for older browsers
  animation: os-size-observer-appear-animation 1ms forwards;
}

.os-size-observer-listener {
  box-sizing: border-box;
  position: relative;
  flex: auto;
  padding: inherit;
  border: inherit;
  margin: -$inflate-margin;
  transform: scale(
                  math.div(1, $shrink-scale)
  ); // scale(calc(1 / #{$shrink-scale})) not supported in ie11

  &.ltr {
    margin-right: -$inflate-margin * 2;
    margin-left: 0;
  }
  &.rtl {
    margin-left: -$inflate-margin * 2;
    margin-right: 0;
  }

  &:empty::before {
    content: '';
    width: 100%;
    height: 100%;
  }

  &:empty::before,
  & > .os-size-observer-listener-item {
    display: block;
    position: relative;
    padding: inherit;
    border: inherit;
    box-sizing: content-box;
    flex: auto;
  }
}

.os-size-observer-listener-scroll {
  box-sizing: border-box;
  display: flex;
}

.os-size-observer-listener-item {
  right: 0;
  bottom: 0;
  overflow: hidden;
  direction: ltr;
  flex: none;
}

.os-size-observer-listener-item-final {
  transition: none;
}

// choose the most lightweight animatable css prop: https://csstriggers.com/
@keyframes os-size-observer-appear-animation {
  from {
    cursor: auto;
  }
  to {
    cursor: none;
  }
}

/**
 * environment setup
 */

.os-environment {
  --os-custom-prop: -1;
  position: fixed;
  opacity: 0;
  visibility: hidden;
  overflow: scroll;
  height: 200px;
  width: 200px;
  z-index: var(--os-custom-prop);

  div {
    width: 200%;
    height: 200%;
    margin: 10px 0;
  }

  &.os-environment-flexbox-glue {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    height: auto;
    width: auto;
    min-height: 200px;
    min-width: 200px;

    div {
      flex: auto;
      width: auto;
      height: auto;
      max-height: 100%;
      max-width: 100%;
      margin: 0;
    }
  }

  &.os-environment-flexbox-glue-max {
    max-height: 200px;

    div {
      overflow: visible;

      &::before {
        content: '';
        display: block;
        height: 999px;
        width: 999px;
      }
    }
  }
}

/**
 * hide native scrollbars
 */

.os-environment,
.os-viewport {
  -ms-overflow-style: scrollbar !important;
}
[data-overlayscrollbars-initialize],
[data-overlayscrollbars~='scrollbarHidden'],
.os-viewport-scrollbar-hidden.os-environment,
.os-viewport-scrollbar-hidden.os-viewport {
  scrollbar-width: none !important;
}
[data-overlayscrollbars-initialize]::-webkit-scrollbar,
[data-overlayscrollbars-initialize]::-webkit-scrollbar-corner,
[data-overlayscrollbars~='scrollbarHidden']::-webkit-scrollbar,
[data-overlayscrollbars~='scrollbarHidden']::-webkit-scrollbar-corner,
.os-viewport-scrollbar-hidden.os-environment::-webkit-scrollbar,
.os-viewport-scrollbar-hidden.os-environment::-webkit-scrollbar-corner,
.os-viewport-scrollbar-hidden.os-viewport::-webkit-scrollbar,
.os-viewport-scrollbar-hidden.os-viewport::-webkit-scrollbar-corner {
  appearance: none !important;
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

/**
 * elements wont suddenly crop after initialization is done
 */

[data-overlayscrollbars-initialize] {
  overflow: auto;
}

/**
 * applied to body
 */

html[data-overlayscrollbars],
html.os-viewport-scrollbar-hidden,
html.os-viewport-scrollbar-hidden > body {
  box-sizing: border-box;
  margin: 0;
  width: 100%;
  height: 100%;
}
html[data-overlayscrollbars] > body {
  overflow: visible;
}

/**
 * structure setup
 */

[data-overlayscrollbars~='host'] {
  position: relative;
}
[data-overlayscrollbars~='host'],
.os-padding {
  display: flex;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
}

.os-padding,
.os-viewport {
  box-sizing: inherit;
  flex: auto !important;
  height: auto;
  width: 100%;
  padding: 0;
  margin: 0;
  border: none;
  z-index: 0;
}

.os-viewport {
  --os-vaw: 0;
  --os-vah: 0;

  &.os-viewport-arrange {
    position: relative;
  }

  &.os-viewport-arrange::before {
    content: '';
    position: absolute;
    pointer-events: none;
    z-index: -1;
    min-width: 1px;
    min-height: 1px;
    width: var(--os-vaw);
    height: var(--os-vah);
  }
}

[data-overlayscrollbars~='host'],
[data-overlayscrollbars~='viewport'] {
  overflow: hidden;
}
[data-overlayscrollbars~='overflowVisible'] {
  overflow: visible;
}
[data-overlayscrollbars-overflow-x='hidden'] {
  overflow-x: hidden;
}
[data-overlayscrollbars-overflow-x='scroll'] {
  overflow-x: scroll;
}
[data-overlayscrollbars-overflow-x='hidden'] {
  overflow-y: hidden;
}
[data-overlayscrollbars-overflow-y='scroll'] {
  overflow-y: scroll;
}

.os-padding,
.os-viewport {
  overflow: hidden;
}

.os-overflow-visible {
  overflow: visible;
}

.os-content {
  box-sizing: inherit;
}

/**
 * optional & experimental grid mode
 */

[data-overlayscrollbars-grid],
[data-overlayscrollbars-grid] .os-padding {
  display: grid;
  grid-template: 1fr / 1fr;
}
[data-overlayscrollbars-grid] > .os-padding,
[data-overlayscrollbars-grid] > .os-viewport,
[data-overlayscrollbars-grid] > .os-padding > .os-viewport {
  height: auto !important;
  width: auto !important;
}

.os-trinsic-observer {
  flex: none;
  box-sizing: border-box;
  position: relative;
  max-width: 0px;
  max-height: 1px;
  padding: 0;
  margin: 0;
  border: none;
  overflow: hidden;
  z-index: -1;
  height: 0;
  top: calc(100% + 1px);
  contain: strict;

  &:not(:empty) {
    height: calc(100% + 1px);
    top: -1px;

    & > .os-size-observer {
      width: 1000%;
      height: 1000%;
      min-height: 1px;
      min-width: 1px;
    }
  }
}