/*
# Before / After compare view

Usage:
  <div data-controller="before-after" data-before-after-target="container" class="compare">
    <div class="compare__layer">
      <img class="compare__image compare__image--after" src="..." alt="after">
    </div>
    <div class="compare__layer compare__layer--before" data-before-after-target="before">
      <img class="compare__image" src="..." alt="before">
    </div>
    <div class="compare__divider" data-before-after-target="divider">
      <button type="button" data-action="pointerdown->before-after#startDrag" class="compare__handle" aria-label="Drag to compare">
        <span>⇔</span>
      </button>
    </div>
  </div>

The two images must share identical intrinsic dimensions; the before layer is
clipped horizontally so both layers stay aligned underneath the handle.
*/

.compare {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  user-select: none;
  touch-action: none;
  background: var(--color-graphite);
}

.compare__layer {
  position: absolute;
  inset: 0;
}

.compare__layer--before {
  clip-path: inset(0 50% 0 0);
  will-change: clip-path;
}

.compare__image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.compare__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  margin-left: -1px;
  background: color-mix(in oklch, var(--color-paper) 85%, transparent);
  pointer-events: none;
}

.compare__handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: color-mix(in oklch, var(--color-ink) 85%, transparent);
  color: var(--color-paper);
  cursor: ew-resize;
  pointer-events: auto;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
}