/*
 * Slider
 *
 *   header  label (Field's label) and the value, on one line
 *   track   24px tall — the hit area — around a 4px rail, radius/full
 *   knob    20px, surface/default, a 2px surface/primary ring, shadow/xs,
 *           centred in a 24px thumb box so the target clears WCAG 2.5.8
 *   fill    surface/primary, from the start (or the low thumb) to the thumb
 *
 * The fill's ends arrive as custom properties, the same way ProgressBar's
 * width does, so the only inline values are percentages on token-named
 * properties. The thumbs' inline `left` and transform are React Aria's.
 */
.ion-slider {
  --ion-slider-rail: var(--spacing-4);
  --ion-slider-thumb: var(--spacing-24);
  --ion-slider-knob: var(--spacing-20);
  --ion-slider-fill: var(--surface-primary);
  --ion-slider-from: 0%;
  --ion-slider-to: 0%;

  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
  min-width: calc(var(--ion-slider-thumb) * 4);
  font-family: var(--font-family-sans);
}

.ion-slider__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--spacing-8);
  font-size: var(--type-body-sm);
  line-height: var(--type-body-sm-line-height);
}

.ion-slider__label {
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
}

.ion-slider__value {
  color: var(--text-default);
  font-variant-numeric: tabular-nums;
}

/*
 * The track is inset by half a thumb on each side, so a thumb at 0% or 100%
 * sits inside the component rather than hanging half over its edge — the
 * thumb is positioned by its centre.
 */
.ion-slider__track {
  position: relative;
  height: var(--ion-slider-thumb);
  margin-inline: calc(var(--ion-slider-thumb) / 2);
  touch-action: none;
  cursor: pointer;
}

.ion-slider__rail,
.ion-slider__fill {
  position: absolute;
  top: 50%;
  height: var(--ion-slider-rail);
  border-radius: var(--radius-full);
  transform: translateY(-50%);
}

.ion-slider__rail {
  inset-inline: 0;
  background-color: var(--surface-muted);
}

.ion-slider__fill {
  /* stylelint-disable-next-line property-disallowed-list -- Slider.tsx has
     already mirrored `from` and `to` for right-to-left, so these are
     fractions from the physical left. */
  left: var(--ion-slider-from);
  width: calc(var(--ion-slider-to) - var(--ion-slider-from));
  background-color: var(--ion-slider-fill);
}

/* React Aria sets `left` and `translate(-50%, -50%)`; `top` is ours. */
.ion-slider__thumb {
  top: 50%;
  display: grid;
  place-items: center;
  width: var(--ion-slider-thumb);
  height: var(--ion-slider-thumb);
  border-radius: var(--radius-full);
  cursor: grab;
}

.ion-slider__thumb::before {
  content: '';
  box-sizing: border-box;
  width: var(--ion-slider-knob);
  height: var(--ion-slider-knob);
  background-color: var(--surface-default);
  border: var(--border-width-thick) solid var(--ion-slider-fill);
  border-radius: var(--radius-full);
  box-shadow: var(--ion-shadow-shadow-xs);
  transition: transform var(--ion-duration-fast) var(--ion-ease-out);
}

.ion-slider__thumb[data-dragging='true'] {
  cursor: grabbing;
}

.ion-slider__thumb[data-dragging='true']::before {
  transform: scale(1.1);
}

/* The ring goes round the whole 24px target, not the knob inside it. */
.ion-slider__thumb[data-focus-visible='true'] {
  outline: var(--border-width-thick) solid var(--border-focus);
  outline-offset: 0;
}

.ion-slider__helper {
  color: var(--text-tertiary);
  font-size: var(--type-body-sm);
  line-height: var(--type-body-sm-line-height);
}

/*
 * The fill goes to border/disabled, not surface/disabled: surface/disabled is
 * a shade off the rail's surface/muted, and a disabled slider whose fill
 * vanished would stop showing its value. The knob's ring follows the fill.
 */
.ion-slider[data-disabled='true'] {
  --ion-slider-fill: var(--border-disabled);
}

.ion-slider[data-disabled='true'] .ion-slider__track,
.ion-slider[data-disabled='true'] .ion-slider__thumb {
  cursor: not-allowed;
}

.ion-slider[data-disabled='true'] .ion-slider__label,
.ion-slider[data-disabled='true'] .ion-slider__value {
  color: var(--text-disabled);
}

.ion-slider[data-disabled='true'] .ion-slider__thumb::before {
  box-shadow: none;
}

@media (forced-colors: active) {
  .ion-slider__rail {
    background-color: CanvasText;
  }

  .ion-slider__fill {
    background-color: Highlight;
  }

  .ion-slider__thumb::before {
    background-color: Canvas;
    border-color: Highlight;
  }

  .ion-slider[data-disabled='true'] .ion-slider__fill,
  .ion-slider[data-disabled='true'] .ion-slider__thumb::before {
    background-color: GrayText;
    border-color: GrayText;
  }
}