/**
 * Variant CSS: gallery--trio-overlap-cascade
 *
 * Three frames (4:5) cascading on a diagonal — each next photo slightly overlaps
 * the previous and steps lower, like prints laid out on a desk (hover lifts a
 * frame to the front). Unlike even-trio-row / passe-partout (even gapped grid)
 * and full-bleed-band (touching, no overlap): here the photos OVERLAP on the
 * diagonal, with shadow and a faint tilt — a dynamic, hand-arranged rhythm.
 * Unlike stagger (gridded vertical offsets) and podium (symmetric centre): this
 * is directional, down-and-right motion. Built on a flex row (no wrap needed at
 * desktop); children overlap via negative inline margin + translateY step. Text
 * stays --ink (polarity aware); kicker + the em take --accent; images carry
 * --photo-filter. Image src are swapped by the photo system. Dedicated to exactly
 * three photos. Part of the `gallery` role.
 */

body.aibt-universal .universal-gallery--trio-overlap-cascade {
	padding-block: calc(clamp(3rem, 7vw, 5.5rem) * var(--density, 1));
	background: var(--background);
	color: var(--text-primary);
}

/* Intro. */
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__intro {
	margin-bottom: clamp(2.4rem, 5vw, 3.6rem);
}

body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__kicker {
	font-family: var(--font-body) !important;
	font-size: var(--text-xs) !important;
	font-weight: 600 !important;
	letter-spacing: var(--tracking-widest) !important;
	text-transform: uppercase !important;
	color: var(--accent) !important;
	margin: 0 0 var(--space-sm) 0 !important;
}

body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__headline {
	font-family: var(--font-display) !important;
	color: var(--ink) !important;
	margin: 0 !important;
}

body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__headline em {
	color: var(--accent) !important;
	font-style: italic;
}

/* The cascade: a flex row anchored at the top. Each tile is ~38% wide; tiles 2
   and 3 pull left to overlap the prior frame and translate down to step along the
   diagonal. Extra bottom padding on the container reserves room for the lowest
   step + its shadow so nothing clips. */
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__cascade {
	display: flex;
	flex-direction: row;
	flex-wrap: nowrap;
	align-items: flex-start;
	justify-content: center;
	gap: 0;
	padding-bottom: calc(clamp(2.5rem, 6vw, 4.5rem) * var(--density, 1));
}

body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item {
	margin: 0 !important;
	flex: 0 0 38%;
	max-width: 38%;
	overflow: hidden;
	border-radius: var(--decor-radius, 14px);
	box-shadow: 0 18px 40px -22px rgba(0, 0, 0, 0.5);
	transition: transform var(--duration-base, 300ms) var(--ease-default, ease),
		box-shadow var(--duration-base, 300ms) var(--ease-default, ease);
	position: relative;
	z-index: 1;
}

/* Step 1: highest, slight counter-clockwise tilt. */
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(1) {
	transform: translateY(0) rotate(-1.5deg);
	z-index: 1;
}

/* Step 2: overlaps step 1, drops a step, sits above. */
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(2) {
	margin-inline-start: -6% !important;
	transform: translateY(clamp(1.6rem, 4vw, 3rem)) rotate(1deg);
	z-index: 2;
}

/* Step 3: overlaps step 2, drops furthest, on top. */
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(3) {
	margin-inline-start: -6% !important;
	transform: translateY(clamp(3.2rem, 8vw, 6rem)) rotate(-0.5deg);
	z-index: 3;
}

/* Hover/focus lifts the hovered frame above its neighbours and straightens it. */
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:hover,
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:focus-within {
	z-index: 4;
	box-shadow: 0 26px 54px -22px rgba(0, 0, 0, 0.58);
}
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(1):hover,
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(1):focus-within {
	transform: translateY(-6px) rotate(0deg) scale(1.02);
}
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(2):hover,
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(2):focus-within {
	transform: translateY(calc(clamp(1.6rem, 4vw, 3rem) - 6px)) rotate(0deg) scale(1.02);
}
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(3):hover,
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(3):focus-within {
	transform: translateY(calc(clamp(3.2rem, 8vw, 6rem) - 6px)) rotate(0deg) scale(1.02);
}

body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
	filter: var(--photo-filter, none);
}

/* Keyboard focus parity with hover (image becomes focusable when a client links it). */
body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item a:focus-visible {
	outline: 3px solid var(--accent);
	outline-offset: 3px;
	border-radius: var(--decor-radius, 14px);
}

/* Tablet: keep the cascade but widen tiles + soften the diagonal so the lowest
   step does not push the section too tall. */
@media (min-width: 641px) and (max-width: 959px) {
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item {
		flex-basis: 42%;
		max-width: 42%;
	}
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(2) {
		transform: translateY(clamp(1.2rem, 3vw, 2.2rem)) rotate(1deg);
	}
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(3) {
		transform: translateY(clamp(2.4rem, 6vw, 4.4rem)) rotate(-0.5deg);
	}
}

/* Mobile: an overlapping diagonal row gets too narrow and tall — drop the overlap,
   tilt and step entirely, and stack into a clean single column. Reset transforms,
   negative margins and the reserved bottom padding. */
@media (max-width: 640px) {
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__cascade {
		flex-direction: column;
		align-items: stretch;
		gap: clamp(0.7rem, 3vw, 1.1rem);
		padding-bottom: 0;
	}
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item {
		flex-basis: auto;
		max-width: 100%;
		margin-inline-start: 0 !important;
	}
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(1),
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(2),
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(3) {
		transform: none;
	}
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__kicker {
		letter-spacing: var(--tracking-wide) !important;
	}
}

@media (prefers-reduced-motion: reduce) {
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item {
		transition: none;
	}
	/* Keep the static cascade transforms (they are layout, not motion), but disable
	   the hover scale/lift so nothing animates. */
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(1):hover,
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(1):focus-within {
		transform: translateY(0) rotate(-1.5deg);
	}
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(2):hover,
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(2):focus-within {
		transform: translateY(clamp(1.6rem, 4vw, 3rem)) rotate(1deg);
	}
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(3):hover,
	body.aibt-universal .universal-gallery--trio-overlap-cascade .universal-gallery__item:nth-child(3):focus-within {
		transform: translateY(clamp(3.2rem, 8vw, 6rem)) rotate(-0.5deg);
	}
}