/*
 * Before / After image comparison
 * Paired with includes/before-after.php and js/before-after.js
 */

.before-after {
	--ba-color: #db642f;
	--ba-split: 50%;
	--ba-handle: 44px;
	--ba-line: 3px;

	position: relative;
	display: block;
	width: 100%;
	max-width: 100%;
	margin: 1.5em 0;
	overflow: hidden;
	line-height: 0;
	user-select: none;
	-webkit-user-select: none;
	touch-action: pan-y;
}

/* The "after" image sets the box height. The "before" image sits on top and
   is clipped from the right by the current split. */
.before-after__img {
	display: block;
	width: 100%;
	height: auto;
	max-width: 100%;
	margin: 0;
	pointer-events: none;
}

.before-after__img--after {
	position: relative;
}

.before-after__img--before {
	position: absolute;
	top: 0;
	left: 0;
	height: 100%;
	object-fit: cover;
	clip-path: inset(0 calc(100% - var(--ba-split)) 0 0);
}

/* Labels, hidden until hover / focus, always shown where hover is unavailable */
.before-after__label {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	padding: 0.4em 0.75em;
	background: rgba(255, 255, 255, 0.3);
	color: var(--ba-color);
	font-size: 14px;
	font-weight: 700;
	line-height: 1.4;
	letter-spacing: 0.04em;
	border-radius: 2px;
	opacity: 0;
	transition: opacity 0.35s ease;
	pointer-events: none;
	z-index: 2;
}

.before-after__label--before {
	left: 10px;
}

.before-after__label--after {
	right: 10px;
}

.before-after:hover .before-after__label,
.before-after:focus-within .before-after__label {
	opacity: 1;
}

@media (hover: none) {
	.before-after__label {
		opacity: 1;
	}
}

/* Divider line with a circular grip in the middle */
.before-after__handle {
	position: absolute;
	top: 0;
	bottom: 0;
	left: var(--ba-split);
	width: var(--ba-line);
	margin-left: calc(var(--ba-line) / -2);
	background: var(--ba-color);
	pointer-events: none;
	z-index: 2;
}

.before-after__handle::before {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	width: var(--ba-handle);
	height: var(--ba-handle);
	margin: calc(var(--ba-handle) / -2) 0 0 calc(var(--ba-handle) / -2);
	border: var(--ba-line) solid var(--ba-color);
	border-radius: 50%;
	box-sizing: border-box;
	box-shadow: 0 0 12px rgba(51, 51, 51, 0.5);
	/* Punch the vertical line out inside the circle */
	background:
		linear-gradient(rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.35)) center / var(--ba-line) 100% no-repeat,
		rgba(0, 0, 0, 0.35);
}

/* Left / right arrows inside the grip */
.before-after__handle::after {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	width: 18px;
	height: 8px;
	margin: -4px 0 0 -9px;
	background:
		linear-gradient(var(--ba-color), var(--ba-color)) left / 6px 100% no-repeat,
		linear-gradient(var(--ba-color), var(--ba-color)) right / 6px 100% no-repeat;
	clip-path: polygon(0 50%, 6px 0, 6px 100%, 0 50%, 100% 50%, calc(100% - 6px) 0, calc(100% - 6px) 100%, 100% 50%);
}

/* The range input is invisible but covers the whole box, so drag / touch /
   keyboard all just work. */
.before-after__range {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 0;
	background: transparent;
	opacity: 0;
	cursor: ew-resize;
	-webkit-appearance: none;
	appearance: none;
	z-index: 3;
}

.before-after__range::-webkit-slider-thumb {
	-webkit-appearance: none;
	width: var(--ba-handle);
	height: 100%;
}

.before-after__range::-moz-range-thumb {
	width: var(--ba-handle);
	height: 100%;
	border: 0;
	border-radius: 0;
}

.before-after__range::-webkit-slider-runnable-track,
.before-after__range::-moz-range-track {
	width: 100%;
	height: 100%;
	background: transparent;
	border: 0;
}

.before-after:focus-within {
	outline: 2px solid var(--ba-color);
	outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
	.before-after__label {
		transition: none;
	}
}