/**
 * 画像比較 — フロント
 */

.arc-image-compare {
  --arc-ic-pos: 50;
  --arc-ic-handle-size: 2.75rem;
  --arc-ic-divider-width: 3px;
  --arc-ic-label-bg: rgba(0, 0, 0, 0.62);
  --arc-ic-label-color: #ffffff;
  margin: 0 0 1.5rem;
  max-width: 100%;
  text-align: left;
}

.arc-image-compare--empty {
  padding: 1rem;
  font-size: 0.9375rem;
  color: #666666;
}

.arc-image-compare__frame {
  position: relative;
  overflow: hidden;
  border-radius: 0.25rem;
  background: #111111;
  touch-action: none;
  user-select: none;
}

.arc-image-compare__layer {
  position: relative;
}

.arc-image-compare__layer--after {
  z-index: 1;
}

.arc-image-compare__img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.arc-image-compare__layer--before {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  overflow: hidden;
  pointer-events: none;
}

.arc-image-compare--horizontal .arc-image-compare__layer--before {
  width: calc(var(--arc-ic-pos, 50) * 1%);
  height: 100%;
}

.arc-image-compare--vertical .arc-image-compare__layer--before {
  width: 100%;
  height: calc(var(--arc-ic-pos, 50) * 1%);
}

.arc-image-compare__layer--before .arc-image-compare__img {
  position: absolute;
  top: 0;
  left: 0;
  max-width: none;
  width: 100%;
  height: auto;
}

.arc-image-compare__label {
  position: absolute;
  z-index: 3;
  padding: 0.35rem 0.65rem;
  border-radius: 0.2rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
  color: var(--arc-ic-label-color);
  background: var(--arc-ic-label-bg);
  pointer-events: none;
}

.arc-image-compare__label--before,
.arc-image-compare__label--after {
  top: 0.75rem;
}

.arc-image-compare__label--before {
  left: 0.75rem;
}

.arc-image-compare__label--after {
  right: 0.75rem;
}

.arc-image-compare__divider {
  position: absolute;
  z-index: 4;
  pointer-events: none;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
}

.arc-image-compare--horizontal .arc-image-compare__divider {
  top: 0;
  bottom: 0;
  left: calc(var(--arc-ic-pos, 50) * 1%);
  width: 0;
  transform: translateX(-50%);
  border-left: var(--arc-ic-divider-width) solid #ffffff;
}

.arc-image-compare--vertical .arc-image-compare__divider {
  left: 0;
  right: 0;
  top: calc(var(--arc-ic-pos, 50) * 1%);
  height: 0;
  transform: translateY(-50%);
  border-top: var(--arc-ic-divider-width) solid #ffffff;
}

.arc-image-compare__handle {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--arc-ic-handle-size);
  height: var(--arc-ic-handle-size);
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0.15rem 0.75rem rgba(0, 0, 0, 0.28);
}

.arc-image-compare--horizontal .arc-image-compare__handle,
.arc-image-compare--vertical .arc-image-compare__handle {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.arc-image-compare--horizontal .arc-image-compare__handle::before,
.arc-image-compare--horizontal .arc-image-compare__handle::after {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-top: 0.35rem solid transparent;
  border-bottom: 0.35rem solid transparent;
}

.arc-image-compare--horizontal .arc-image-compare__handle::before {
  margin-right: 0.15rem;
  border-right: 0.45rem solid #222222;
}

.arc-image-compare--horizontal .arc-image-compare__handle::after {
  margin-left: 0.15rem;
  border-left: 0.45rem solid #222222;
}

.arc-image-compare--vertical .arc-image-compare__handle::before,
.arc-image-compare--vertical .arc-image-compare__handle::after {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-left: 0.35rem solid transparent;
  border-right: 0.35rem solid transparent;
}

.arc-image-compare--vertical .arc-image-compare__handle::before {
  margin-bottom: 0.15rem;
  border-bottom: 0.45rem solid #222222;
}

.arc-image-compare--vertical .arc-image-compare__handle::after {
  margin-top: 0.15rem;
  border-top: 0.45rem solid #222222;
}

/* 透明 range：キーボード操作・タッチ用 */
.arc-image-compare__input {
  position: absolute;
  z-index: 5;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  opacity: 0;
  appearance: none;
  -webkit-appearance: none;
}

.arc-image-compare--horizontal .arc-image-compare__input,
.arc-image-compare--vertical .arc-image-compare__input {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.arc-image-compare--horizontal .arc-image-compare__input {
  cursor: ew-resize;
}

.arc-image-compare--vertical .arc-image-compare__input {
  cursor: ns-resize;
  writing-mode: vertical-lr;
  direction: rtl;
}

.arc-image-compare__caption {
  margin: 0.65rem 0 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: inherit;
}

/* 横長 + 縦長の混在時：横長の比率に合わせ、縦長は上下クロップ */
.arc-image-compare--crop-landscape .arc-image-compare__frame {
  aspect-ratio: var(--arc-ic-aspect-w, 16) / var(--arc-ic-aspect-h, 9);
}

.arc-image-compare--crop-landscape .arc-image-compare__layer--after {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.arc-image-compare--crop-landscape .arc-image-compare__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.arc-image-compare--crop-landscape .arc-image-compare__layer--before {
  height: 100%;
}

.arc-image-compare--crop-landscape .arc-image-compare__layer--before .arc-image-compare__img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  max-width: none;
}

@media (prefers-reduced-motion: reduce) {
  .arc-image-compare__divider,
  .arc-image-compare__layer--before {
    transition: none !important;
  }
}