:where([data-part='captions'] [data-part='region']) {
  --anchor-x-percent: calc(var(--region-anchor-x) / 100);
  --anchor-x: calc(var(--region-width) * var(--anchor-x-percent));
  --anchor-y-percent: calc(var(--region-anchor-y) / 100);
  --anchor-y: calc(var(--region-height) * var(--anchor-y-percent));
  --vp-anchor-x: calc(var(--region-viewport-anchor-x) * 1%);
  --vp-anchor-y-percent: calc(var(--region-viewport-anchor-y) / 100);
  --vp-anchor-y: calc(var(--overlay-height) * var(--vp-anchor-y-percent));
  position: absolute;
  display: inline-flex;
  flex-flow: column;
  justify-content: flex-start;
  width: var(--region-width);
  height: var(--region-height);
  min-height: 0px;
  max-height: var(--region-height);
  writing-mode: horizontal-tb;
  top: var(--region-top, calc(var(--vp-anchor-y) - var(--anchor-y)));
  left: var(--region-left, calc(var(--vp-anchor-x) - var(--anchor-x)));
  right: var(--region-right);
  bottom: var(--region-bottom);
  overflow: hidden;
  overflow-wrap: break-word;
  box-sizing: border-box;
}

:where([data-part='captions'] [data-part='region'][data-active]) {
}

:where([data-part='captions'] [data-part='region'][data-scroll='up']) {
  justify-content: end;
}

:where([data-part='captions'] [data-part='region'][data-active][data-scroll='up']) {
  transition: top 0.433s;
}

:where([data-part='captions'] [data-part='region'] > [data-part='cue-display']) {
  position: relative;
  width: auto;
  left: var(--cue-offset);
  height: var(--cue-height, auto);
  text-align: var(--cue-text-align);
  unicode-bidi: plaintext;
  margin-top: 1px;
}

:where([data-part='captions'] [data-part='region'] [data-part='cue']) {
  position: relative;
  padding: calc(var(--cue-padding-y) / 2) var(--cue-padding-x);
  border-radius: 0px;
}