*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

:root {
	--paper: #f5f3ef;
	--ink: #1a1a18;
	--muted: #8a8880;
	--border: #dddbd6;
}

html,
body {
	background: var(--paper);
	color: var(--ink);
	font-family: "Geist", ui-sans-serif, system-ui, sans-serif;
	min-height: 100vh;
}

/* ── HEADER ── */
header {
	padding: 2rem 2.5rem 1.5rem;
	border-bottom: 1px solid var(--border);
	display: flex;
	align-items: baseline;
	gap: 1.5rem;
}
header h1 {
	font-size: 1.1rem;
	font-weight: 500;
	letter-spacing: -0.01em;
}
header nav a {
	font-size: 0.85rem;
	color: var(--muted);
	text-decoration: none;
}
header nav a:hover {
	color: var(--ink);
}

/* ── PAGES ── */
.page {
	display: none;
}
.page.active {
	display: block;
}

/* ── HOME ── */
#home {
	padding: 2rem 2.5rem;
}

.collections {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
	gap: 1.25rem;
}

.card {
	cursor: pointer;
	border: 1px solid var(--border);
	background: #fff;
	overflow: hidden;
	transition: border-color 0.15s;
}
.card:hover {
	border-color: var(--ink);
}

.card-thumb {
	width: 100%;
	aspect-ratio: 3/2;
	overflow: hidden;
	background: var(--border);
}
.card-thumb img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.card-label {
	padding: 0.85rem 1rem;
	display: flex;
	justify-content: space-between;
	align-items: baseline;
}
.card-title {
	font-size: 0.95rem;
	font-weight: 500;
	letter-spacing: -0.01em;
}
.card-count {
	font-size: 0.78rem;
	color: var(--muted);
}

/* ── COLLECTION ── */
#collection-header {
	padding: 1.5rem 2.5rem;
	border-bottom: 1px solid var(--border);
	display: flex;
	align-items: baseline;
	gap: 1rem;
}
#collection-title {
	font-size: 1rem;
	font-weight: 500;
	letter-spacing: -0.01em;
}
#collection-count {
	font-size: 0.8rem;
	color: var(--muted);
}

.back {
	font-size: 0.82rem;
	color: var(--muted);
	cursor: pointer;
	user-select: none;
}
.back:hover {
	color: var(--ink);
}

/* ── JUSTIFIED GRID ── */
#photo-grid {
	padding: 1.25rem 2.5rem;
}

/* ── LIGHTBOX ── */
#lightbox {
	display: none;
	position: fixed;
	inset: 0;
	background: #111110;
	z-index: 200;
	flex-direction: column;
}
#lightbox.open {
	display: flex;
}

#lb-bar {
	flex: 0 0 auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 1rem 1.5rem;
}
#lb-info {
	font-size: 0.82rem;
	color: rgba(255, 255, 255, 0.4);
}
#lb-close-btn {
	font-size: 0.82rem;
	color: rgba(255, 255, 255, 0.5);
	cursor: pointer;
	padding: 0.25rem 0.6rem;
	border: 1px solid rgba(255, 255, 255, 0.15);
}
#lb-close-btn:hover {
	color: #fff;
	border-color: rgba(255, 255, 255, 0.4);
}

#lb-stage {
	flex: 1 1 auto;
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	overflow: hidden;
}
#lb-img {
	max-width: 100%;
	max-height: 100%;
	object-fit: contain;
	display: block;
	user-select: none;
	transition: opacity 0.1s;
}
#lb-img.fading {
	opacity: 0;
}

.lb-arrow {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	color: rgba(255, 255, 255, 0.5);
	font-size: 2.2rem;
	line-height: 1;
	cursor: pointer;
	user-select: none;
	padding: 1.5rem 1.25rem;
	z-index: 1;
	transition: color 0.1s;
}
.lb-arrow:hover {
	color: #fff;
}
#lb-prev {
	left: 0;
}
#lb-next {
	right: 0;
}

#lb-strip {
	flex: 0 0 auto;
	display: flex;
	gap: 4px;
	padding: 0.75rem 1.5rem;
	overflow-x: auto;
	scrollbar-width: none;
	justify-content: center;
}
#lb-strip::-webkit-scrollbar {
	display: none;
}

.lb-thumb {
	flex: 0 0 auto;
	width: 52px;
	height: 38px;
	object-fit: cover;
	cursor: pointer;
	opacity: 0.35;
	transition: opacity 0.15s;
	border: 1px solid transparent;
}
.lb-thumb:hover {
	opacity: 0.7;
}
.lb-thumb.active {
	opacity: 1;
	border-color: rgba(255, 255, 255, 0.55);
}

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
	header,
	#home,
	#collection-header {
		padding-left: 1.25rem;
		padding-right: 1.25rem;
	}
	#photo-grid {
		padding-left: 0.75rem;
		padding-right: 0.75rem;
	}
	.collections {
		grid-template-columns: 1fr;
	}
	#lb-strip {
		display: none;
	}
}