/* Urban Spark Gallery 2.0
   Themeable via CSS custom properties. Override any --usg-* value in your
   theme to restyle without touching this file. */

.usg {
	--usg-gap: 12px;
	--usg-ratio: 4 / 3;
	--usg-radius: 10px;
	--usg-caption-color: #5a5a5a;
	--usg-caption-size: 14px;
	--usg-overlay: rgba(0, 0, 0, 0.35);
	--usg-zoom-bg: rgba(255, 255, 255, 0.94);
	--usg-zoom-color: #111;
	--usg-focus: currentColor;
	margin-block: 0 1.5rem;
}

.usg__list {
	list-style: none;
	margin: 0;
	padding: 0;
}

.usg__figure { margin: 0; }

.usg__link {
	position: relative;
	display: block;
	overflow: hidden;
	border-radius: var(--usg-radius);
	background: #f2f2f2;
	text-decoration: none;
	isolation: isolate;
}

.usg__img {
	display: block;
	width: 100%;
	height: auto;
	border-radius: var(--usg-radius);
	background: #f2f2f2;
}

.usg__caption {
	margin-top: 8px;
	font-size: var(--usg-caption-size);
	line-height: 1.4;
	color: var(--usg-caption-color);
}

.usg--no-captions .usg__caption { display: none; }

/* Zoom affordance, replaces the old scale-on-hover that bled over neighbors */
.usg__zoom {
	position: absolute;
	inset-block-end: 12px;
	inset-inline-end: 12px;
	display: grid;
	place-items: center;
	width: 40px;
	height: 40px;
	border-radius: 50%;
	background: var(--usg-zoom-bg);
	color: var(--usg-zoom-color);
	opacity: 0;
	transform: translateY(6px);
	transition: opacity .2s ease, transform .2s ease;
	pointer-events: none;
}
.usg__zoom svg { width: 20px; height: 20px; }

.usg__link::after {
	content: "";
	position: absolute;
	inset: 0;
	background: var(--usg-overlay);
	opacity: 0;
	transition: opacity .2s ease;
	pointer-events: none;
}

.usg__link:hover::after,
.usg__link:focus-visible::after { opacity: 1; }

.usg__link:hover .usg__zoom,
.usg__link:focus-visible .usg__zoom {
	opacity: 1;
	transform: translateY(0);
}

.usg__link:focus-visible {
	outline: 3px solid var(--usg-focus);
	outline-offset: 3px;
}

/* ---------- Grid: uniform tiles ---------- */
.usg--grid .usg__list,
.usg--mosaic .usg__list {
	display: grid;
	gap: var(--usg-gap);
}

.usg--grid.usg--cols-1 .usg__list { grid-template-columns: repeat(1, 1fr); }
.usg--grid.usg--cols-2 .usg__list { grid-template-columns: repeat(2, 1fr); }
.usg--grid.usg--cols-3 .usg__list { grid-template-columns: repeat(3, 1fr); }
.usg--grid.usg--cols-4 .usg__list { grid-template-columns: repeat(4, 1fr); }
.usg--grid.usg--cols-5 .usg__list { grid-template-columns: repeat(5, 1fr); }
.usg--grid.usg--cols-6 .usg__list { grid-template-columns: repeat(6, 1fr); }

.usg--grid .usg__link,
.usg--mosaic .usg__link {
	aspect-ratio: var(--usg-ratio);
}

.usg--grid .usg__img,
.usg--mosaic .usg__img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

/* ---------- Masonry: genuine, via CSS columns ---------- */
.usg--masonry .usg__list {
	column-gap: var(--usg-gap);
	columns: 3;
}
.usg--masonry.usg--cols-1 .usg__list { columns: 1; }
.usg--masonry.usg--cols-2 .usg__list { columns: 2; }
.usg--masonry.usg--cols-3 .usg__list { columns: 3; }
.usg--masonry.usg--cols-4 .usg__list { columns: 4; }
.usg--masonry.usg--cols-5 .usg__list { columns: 5; }
.usg--masonry.usg--cols-6 .usg__list { columns: 6; }

.usg--masonry .usg__item {
	break-inside: avoid;
	margin-bottom: var(--usg-gap);
	display: inline-block;
	width: 100%;
}

/* ---------- Mosaic: first image spans a 2x2 block ---------- */
.usg--mosaic.usg--cols-3 .usg__list { grid-template-columns: repeat(3, 1fr); }
.usg--mosaic.usg--cols-4 .usg__list { grid-template-columns: repeat(4, 1fr); }
.usg--mosaic.usg--cols-2 .usg__list { grid-template-columns: repeat(2, 1fr); }

.usg--mosaic .usg__item:first-child {
	grid-column: span 2;
	grid-row: span 2;
}
.usg--mosaic .usg__item:first-child .usg__link { aspect-ratio: auto; height: 100%; }

/* ---------- Lightbox ---------- */
.usg-lb {
	position: fixed;
	inset: 0;
	z-index: 99999;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(8, 8, 8, .94);
	opacity: 0;
	transition: opacity .2s ease;
}
.usg-lb[hidden] { display: none; }
.usg-lb.is-open { opacity: 1; }

.usg-lb__stage {
	position: relative;
	max-width: min(92vw, 1600px);
	max-height: 84vh;
	display: flex;
	align-items: center;
	justify-content: center;
}
.usg-lb__img {
	max-width: 92vw;
	max-height: 84vh;
	width: auto;
	height: auto;
	display: block;
	border-radius: 6px;
	box-shadow: 0 24px 70px rgba(0, 0, 0, .55);
}

.usg-lb__btn {
	position: absolute;
	display: grid;
	place-items: center;
	width: 52px;
	height: 52px;
	border: 0;
	border-radius: 50%;
	background: rgba(255, 255, 255, .12);
	color: #fff;
	cursor: pointer;
	transition: background .18s ease;
	z-index: 2;
}
.usg-lb__btn:hover { background: rgba(255, 255, 255, .26); }
.usg-lb__btn:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }
.usg-lb__btn svg { width: 24px; height: 24px; }

.usg-lb__close { top: 18px; right: 18px; }
.usg-lb__prev { left: 18px; top: 50%; transform: translateY(-50%); }
.usg-lb__next { right: 18px; top: 50%; transform: translateY(-50%); }

.usg-lb__bar {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 18px;
	display: grid;
	gap: 4px;
	justify-items: center;
	padding-inline: 90px;
	color: #fff;
	font-size: 15px;
	text-align: center;
	pointer-events: none;
}
.usg-lb__counter { opacity: .6; font-size: 13px; letter-spacing: .04em; }

.usg-lb__spinner {
	position: absolute;
	width: 34px;
	height: 34px;
	border: 3px solid rgba(255, 255, 255, .25);
	border-top-color: #fff;
	border-radius: 50%;
	animation: usg-spin .7s linear infinite;
}
.usg-lb__spinner[hidden] { display: none; }
@keyframes usg-spin { to { transform: rotate(360deg); } }

body.usg-lb-open { overflow: hidden; }

.usg-notice {
	padding: 10px 14px;
	border-left: 3px solid #d4a017;
	background: #fdf6e3;
	color: #6b5410;
	font-size: 14px;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
	.usg--grid.usg--cols-4 .usg__list,
	.usg--grid.usg--cols-5 .usg__list,
	.usg--grid.usg--cols-6 .usg__list { grid-template-columns: repeat(3, 1fr); }
	.usg--masonry.usg--cols-4 .usg__list,
	.usg--masonry.usg--cols-5 .usg__list,
	.usg--masonry.usg--cols-6 .usg__list { columns: 3; }
	.usg-lb__bar { padding-inline: 70px; }
}

@media (max-width: 680px) {
	.usg--grid .usg__list { grid-template-columns: repeat(2, 1fr) !important; }
	.usg--masonry .usg__list { columns: 2 !important; }
	.usg--mosaic .usg__list { grid-template-columns: repeat(2, 1fr) !important; }
	.usg--mosaic .usg__item:first-child { grid-column: span 2; grid-row: span 1; }
	.usg-lb__btn { width: 46px; height: 46px; }
	.usg-lb__prev { left: 8px; }
	.usg-lb__next { right: 8px; }
	.usg-lb__close { top: 10px; right: 10px; }
	.usg-lb__bar { padding-inline: 16px; bottom: 12px; }
}

@media (max-width: 420px) {
	.usg--grid .usg__list { grid-template-columns: 1fr !important; }
	.usg--masonry .usg__list { columns: 1 !important; }
}

@media (prefers-reduced-motion: reduce) {
	.usg__link::after,
	.usg__zoom,
	.usg-lb { transition: none; }
	.usg-lb__spinner { animation: none; }
}