/**
 * DIA Photo Gallery — front end
 * Brand: navy #0F2A5F, red #C8102E, Montserrat / Open Sans
 */

.dia-gallery {
	--dia-cols: 3;
	--dia-gap: 16px;
	--dia-height: 260px;
	--dia-navy: #0f2a5f;
	--dia-red: #c8102e;
	--dia-radius: 4px;
	--dia-stack-gap: 20px;
	--dia-stack-max-height: none;
	--dia-stack-bleed: 16px;
}

/* ------------------------------------------------------------ Filters */

.dia-gallery__filters {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
	margin: 0 0 32px;
}

.dia-gallery__filter {
	appearance: none;
	background: transparent;
	border: 1px solid rgba(15, 42, 95, 0.25);
	border-radius: 2px;
	color: var(--dia-navy);
	cursor: pointer;
	font-family: "Montserrat", "Open Sans", system-ui, sans-serif;
	font-size: 14px;
	font-weight: 600;
	letter-spacing: 0.01em;
	line-height: 1.2;
	padding: 11px 20px;
	transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.dia-gallery__filter:hover,
.dia-gallery__filter:focus-visible {
	background: var(--dia-navy);
	border-color: var(--dia-navy);
	color: #fff;
}

.dia-gallery__filter:focus-visible {
	outline: 2px solid var(--dia-red);
	outline-offset: 2px;
}

.dia-gallery__filter.is-active {
	background: var(--dia-navy);
	border-color: var(--dia-navy);
	box-shadow: inset 0 -3px 0 var(--dia-red);
	color: #fff;
}

.dia-gallery__count {
	display: inline-block;
	font-size: 0.8em;
	margin-left: 6px;
	opacity: 0.65;
}

/* --------------------------------------------------------------- Grid */

.dia-gallery__grid {
	display: grid;
	grid-template-columns: repeat(var(--dia-cols), minmax(0, 1fr));
	gap: var(--dia-gap);
}

.dia-gallery--masonry .dia-gallery__grid {
	column-count: var(--dia-cols);
	column-gap: var(--dia-gap);
	display: block;
}

.dia-gallery--masonry .dia-gallery__item {
	break-inside: avoid;
	display: block;
	margin: 0 0 var(--dia-gap);
	width: 100%;
}

.dia-gallery__item {
	margin: 0;
	min-width: 0;
	transition: opacity 0.22s ease, transform 0.22s ease;
}

.dia-gallery__item.is-hiding {
	opacity: 0;
	transform: scale(0.97);
}

.dia-gallery__item.is-hidden {
	display: none;
}

.dia-gallery__link {
	display: block;
	text-decoration: none;
}

.dia-gallery__link:focus-visible {
	outline: 3px solid var(--dia-red);
	outline-offset: 3px;
}

.dia-gallery__frame {
	background: rgba(15, 42, 95, 0.06);
	border-radius: var(--dia-radius);
	display: block;
	overflow: hidden;
	position: relative;
}

.dia-gallery--grid .dia-gallery__frame {
	height: var(--dia-height);
}

.dia-gallery__img {
	display: block;
	height: 100%;
	object-fit: cover;
	transition: transform 0.4s ease, opacity 0.3s ease;
	width: 100%;
}

.dia-gallery--masonry .dia-gallery__img {
	height: auto;
}

/* Hover treatments */

.dia-gallery--hover-zoom .dia-gallery__item:hover .dia-gallery__img {
	transform: scale(1.06);
}

.dia-gallery--hover-lift .dia-gallery__item:hover .dia-gallery__frame {
	box-shadow: 0 14px 28px rgba(15, 42, 95, 0.22);
	transform: translateY(-4px);
}

.dia-gallery--hover-lift .dia-gallery__frame {
	transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.dia-gallery--hover-fade .dia-gallery__item:hover .dia-gallery__img {
	opacity: 0.75;
}

/* ----------------------------------------------------------- Captions */

.dia-gallery__overlay {
	align-items: flex-end;
	background: linear-gradient(to top, rgba(15, 42, 95, 0.92) 0%, rgba(15, 42, 95, 0.55) 45%, rgba(15, 42, 95, 0) 100%);
	bottom: 0;
	color: #fff;
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	left: 0;
	opacity: 0;
	padding: 18px;
	position: absolute;
	right: 0;
	top: 0;
	transition: opacity 0.25s ease;
}

.dia-gallery__item:hover .dia-gallery__overlay,
.dia-gallery__link:focus-visible .dia-gallery__overlay {
	opacity: 1;
}

.dia-gallery__caption {
	color: #fff;
	font-family: "Montserrat", system-ui, sans-serif;
	font-size: 16px;
	font-weight: 600;
	line-height: 1.35;
}

.dia-gallery__tag {
	border-top: 2px solid var(--dia-red);
	color: rgba(255, 255, 255, 0.85);
	display: inline-block;
	font-family: "Open Sans", system-ui, sans-serif;
	font-size: 12px;
	letter-spacing: 0.02em;
	margin-top: 8px;
	padding-top: 6px;
}

.dia-gallery--no-tag .dia-gallery__tag {
	display: none;
}

.dia-gallery__figcaption {
	color: var(--dia-navy);
	font-family: "Open Sans", system-ui, sans-serif;
	font-size: 14px;
	line-height: 1.5;
	padding: 10px 2px 0;
}

.dia-gallery__noresults,
.dia-gallery__empty {
	color: var(--dia-navy);
	font-family: "Open Sans", system-ui, sans-serif;
	padding: 24px 0;
	text-align: center;
}

/* ------------------------------------------------------- Small screens */

@media (max-width: 1024px) {
	.dia-gallery__grid {
		grid-template-columns: repeat(var(--dia-cols), minmax(0, 1fr));
	}

	/* Stacked view, starting at tablet width. */
	.dia-gallery--stack-tablet .dia-gallery__grid {
		column-count: initial;
		display: flex;
		flex-direction: column;
		gap: var(--dia-stack-gap);
	}

	.dia-gallery--stack-tablet .dia-gallery__item {
		margin: 0;
		width: 100%;
	}

	.dia-gallery--stack-tablet .dia-gallery__frame {
		height: auto;
	}

	.dia-gallery--stack-tablet .dia-gallery__img {
		height: auto;
		max-height: var(--dia-stack-max-height);
		width: 100%;
	}
}

@media (max-width: 767px) {
	.dia-gallery__filters {
		gap: 8px;
	}

	.dia-gallery__filter {
		font-size: 13px;
		padding: 9px 14px;
	}

	/* Captions can't rely on hover on touch devices. */
	.dia-gallery__overlay {
		opacity: 1;
	}

	/* One photo per row, at full width and full height — no cropping. */
	.dia-gallery--stack-mobile .dia-gallery__grid,
	.dia-gallery--stack-tablet .dia-gallery__grid {
		column-count: initial;
		display: flex;
		flex-direction: column;
		gap: var(--dia-stack-gap);
	}

	.dia-gallery--stack-mobile .dia-gallery__item,
	.dia-gallery--stack-tablet .dia-gallery__item {
		margin: 0;
		width: 100%;
	}

	.dia-gallery--stack-mobile .dia-gallery__frame,
	.dia-gallery--stack-tablet .dia-gallery__frame {
		height: auto;
	}

	.dia-gallery--stack-mobile .dia-gallery__img,
	.dia-gallery--stack-tablet .dia-gallery__img {
		height: auto;
		max-height: var(--dia-stack-max-height);
		object-fit: cover;
		width: 100%;
	}

	.dia-gallery--stack-mobile .dia-gallery__caption,
	.dia-gallery--stack-tablet .dia-gallery__caption {
		font-size: 15px;
	}

	/* Filter chips become a single swipeable row instead of stacking up
	   three rows deep above the photos. */
	.dia-gallery--stack-scroll .dia-gallery__filters {
		-webkit-overflow-scrolling: touch;
		flex-wrap: nowrap;
		justify-content: flex-start;
		margin-left: calc(var(--dia-stack-bleed) * -1);
		margin-right: calc(var(--dia-stack-bleed) * -1);
		overflow-x: auto;
		padding: 2px var(--dia-stack-bleed) 6px;
		scroll-snap-type: x proximity;
		scrollbar-width: none;
	}

	.dia-gallery--stack-scroll .dia-gallery__filters::-webkit-scrollbar {
		display: none;
	}

	.dia-gallery--stack-scroll .dia-gallery__filter {
		flex: 0 0 auto;
		scroll-snap-align: start;
	}
}

@media (prefers-reduced-motion: reduce) {
	.dia-gallery__item,
	.dia-gallery__img,
	.dia-gallery__overlay,
	.dia-gallery__frame,
	.dia-gallery__filter {
		transition: none !important;
	}

	.dia-gallery--hover-zoom .dia-gallery__item:hover .dia-gallery__img,
	.dia-gallery--hover-lift .dia-gallery__item:hover .dia-gallery__frame {
		transform: none;
	}
}