.a11y-scroll-cue {
  --a11y-scroll-cue-background: Canvas;
  --a11y-scroll-cue-color: CanvasText;
  --a11y-scroll-cue-border-color: currentColor;
  --a11y-scroll-cue-hint-background: Canvas;
  --a11y-scroll-cue-hint-color: CanvasText;
  --a11y-scroll-cue-shadow: 0.25rem 0.25rem 0 currentColor;
  --a11y-scroll-cue-radius: 0;
  --a11y-scroll-cue-z-index: 2;

  --_background: var(--a11y-scroll-cue-background, Canvas);
  --_color: var(--a11y-scroll-cue-color, CanvasText);
  --_border-color: var(--a11y-scroll-cue-border-color, currentColor);
  --_hint-background: var(--a11y-scroll-cue-hint-background, Canvas);
  --_hint-color: var(--a11y-scroll-cue-hint-color, CanvasText);
  --_shadow: var(--a11y-scroll-cue-shadow, 0.25rem 0.25rem 0 currentColor);
  --_radius: var(--a11y-scroll-cue-radius, 0);
  --_z-index: var(--a11y-scroll-cue-z-index, 2);
  --_opacity: 0;
  --_visibility: hidden;

  position: relative;
  color: var(--_color);
  background: var(--_background);
}

.a11y-scroll-cue__scrollport {
  max-inline-size: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-gutter: stable;
}

.a11y-scroll-cue__scrollport:focus-visible {
  outline: 0.1875rem solid currentColor;
  outline-offset: 0.25rem;
}

.a11y-scroll-cue__edge,
.a11y-scroll-cue__hint {
  opacity: var(--_opacity);
  visibility: var(--_visibility);
  pointer-events: none;
  transition:
    opacity 160ms ease,
    visibility 160ms ease;
}

.a11y-scroll-cue[data-a11y-scroll-cue-visible="true"] {
  --_opacity: 1;
  --_visibility: visible;
}

.a11y-scroll-cue__edge {
  display: none;
}

.a11y-scroll-cue__hint {
  position: static;
  z-index: calc(var(--_z-index) + 1);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  inline-size: fit-content;
  max-inline-size: min(18rem, calc(100% - 1.5rem));
  margin-block-start: 0.75rem;
  margin-inline-start: auto;
  padding: 0.5rem 0.7rem;
  border: 0.125rem solid var(--_border-color);
  border-radius: var(--_radius);
  color: var(--_hint-color);
  background: var(--_hint-background);
  box-shadow: var(--_shadow);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 800;
  line-height: 1.2;
  user-select: none;
}

:dir(rtl) .a11y-scroll-cue__hint {
  margin-inline: 0 auto;
}

.a11y-scroll-cue__hint::after {
  content: "";
  flex: 0 0 auto;
  inline-size: 1.15em;
  block-size: 0.15em;
  background: currentColor;
}

.a11y-scroll-cue__hint[hidden],
.a11y-scroll-cue__edge[hidden] {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .a11y-scroll-cue *,
  .a11y-scroll-cue *::before,
  .a11y-scroll-cue *::after {
    animation-duration: 0.001ms;
    animation-iteration-count: 1;
    scroll-behavior: auto;
    transition-duration: 0.001ms;
  }
}

@media (forced-colors: active) {
  .a11y-scroll-cue__hint {
    border-color: CanvasText;
    color: CanvasText;
    background: Canvas;
    box-shadow: none;
  }
}