/* ── Reset & Base ─────────────────────────────────────────
   Ryan Lafferty
   ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
	--bg:        #0a0a0a;
	--surface:   #111111;
	--text:      #e8e6e0;
	--muted:     #666660;
	--accent:    #c8b89a;
	--border:    rgba(255,255,255,0.07);
	--header-h:  52px;
	--gap:       6px;
	--col-min:   280px;
}

html { scroll-behavior: smooth; }

body {
	background: var(--bg);
	color: var(--text);
	font-family: 'Georgia', serif;
	min-height: 100vh;
	overflow-x: hidden;
}

/* ── Header ──────────────────────────────────────────────── */
#site-header {
	position: fixed;
	top: 0; left: 0; right: 0;
	height: var(--header-h);
	z-index: 100;
	background: rgba(10,10,10,0.85);
	-webkit-backdrop-filter: blur(12px);
	backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--border);
}

#site-header nav {
	max-width: 1800px;
	margin: 0 auto;
	height: 100%;
	display: flex;
	align-items: center;
	gap: 24px;
	padding: 0 20px;
}

.nav-brand {
	font-size: 14px;
	letter-spacing: 0.12em;
	color: var(--text);
	text-decoration: none;
	text-transform: lowercase;
	flex-shrink: 0;
}

.nav-filters {
	display: flex;
	gap: 4px;
	flex: 1;
}

.filter-btn {
	background: transparent;
	border: 1px solid transparent;
	color: var(--muted);
	font-size: 11px;
	letter-spacing: 0.08em;
	padding: 4px 10px;
	border-radius: 20px;
	cursor: pointer;
	transition: color 0.2s, border-color 0.2s;
	font-family: inherit;
	text-transform: lowercase;
}

.filter-btn:hover { color: var(--text); }

.filter-btn.active {
	color: var(--text);
	border-color: var(--border);
	background: rgba(255,255,255,0.05);
}

#viewer-count {
	font-size: 10px;
	color: var(--muted);
	letter-spacing: 0.08em;
	flex-shrink: 0;
	white-space: nowrap;
}

/* ── Main Grid ───────────────────────────────────────────── */
main {
	padding-top: calc(var(--header-h) + var(--gap));
	padding-bottom: 80px;
	max-width: 1800px;
	margin: 0 auto;
	padding-left: var(--gap);
	padding-right: var(--gap);
}

#gallery-grid {
	columns: var(--col-min);
	column-gap: var(--gap);
}

@media (min-width: 900px)  { #gallery-grid { columns: 3 var(--col-min); } }
@media (min-width: 1400px) { #gallery-grid { columns: 4 var(--col-min); } }
@media (min-width: 1800px) { #gallery-grid { columns: 5 var(--col-min); } }
@media (max-width: 600px)  { #gallery-grid { columns: 1; } }

/* ── Gallery Items ───────────────────────────────────────── */
.gallery-item {
	break-inside: avoid;
	display: block;
	margin-bottom: var(--gap);
	position: relative;
	overflow: hidden;
	cursor: pointer;
	background: var(--surface);
	/* LQIP: background-image set inline via JS, background-size covers */
	background-size: cover;
	background-position: center;
}

.gallery-item img {
	display: block;
	width: 100%;
	height: auto;
	transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
	            opacity 0.4s ease;
	opacity: 0;
}

.gallery-item img.loaded { opacity: 1; }

.gallery-item:hover img { transform: scale(1.03); }

.item-overlay {
	position: absolute;
	inset: 0;
	background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 50%);
	opacity: 0;
	transition: opacity 0.3s;
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	padding: 14px;
}

.gallery-item:hover .item-overlay { opacity: 1; }

.item-title {
	font-size: 12px;
	line-height: 1.4;
	color: #fff;
	margin-bottom: 2px;
}

.item-artist {
	font-size: 10px;
	color: rgba(255,255,255,0.6);
	letter-spacing: 0.05em;
}

.item-tag {
	position: absolute;
	top: 10px;
	right: 10px;
	font-size: 9px;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--accent);
	background: rgba(0,0,0,0.6);
	padding: 3px 7px;
	border-radius: 2px;
}

/* ── Loading ──────────────────────────────────────────────── */
#sentinel { height: 1px; }

#loading-indicator {
	display: flex;
	justify-content: center;
	gap: 6px;
	padding: 40px 0;
	opacity: 0;
	transition: opacity 0.3s;
}

#loading-indicator.visible { opacity: 1; }

.dot {
	width: 5px; height: 5px;
	border-radius: 50%;
	background: var(--muted);
	animation: pulse 1.2s ease-in-out infinite;
}

.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes pulse {
	0%, 80%, 100% { opacity: 0.2; transform: scale(0.8); }
	40%           { opacity: 1;   transform: scale(1); }
}

/* ── Lightbox ─────────────────────────────────────────────── */
#lightbox {
	position: fixed;
	inset: 0;
	background: rgba(0,0,0,0.96);
	z-index: 200;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 20px 60px;
}

#lightbox.hidden { display: none; }

#lightbox-close {
	position: fixed;
	top: 18px; right: 22px;
	background: transparent;
	border: none;
	color: var(--muted);
	font-size: 28px;
	cursor: pointer;
	line-height: 1;
	transition: color 0.2s;
	z-index: 201;
	font-family: inherit;
}

#lightbox-close:hover { color: var(--text); }

/* Prev / Next nav arrows */
.lb-nav {
	position: fixed;
	top: 50%;
	transform: translateY(-50%);
	background: transparent;
	border: 1px solid var(--border);
	color: var(--muted);
	font-size: 22px;
	width: 44px;
	height: 44px;
	border-radius: 50%;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: color 0.2s, border-color 0.2s, background 0.2s;
	z-index: 201;
}

.lb-nav:hover:not(:disabled) {
	color: var(--text);
	border-color: rgba(255,255,255,0.25);
	background: rgba(255,255,255,0.06);
}

.lb-nav:disabled {
	opacity: 0.2;
	cursor: default;
}

#lb-prev { left: 12px; }
#lb-next { right: 12px; }

/* Inner layout */
#lightbox-inner {
	display: flex;
	align-items: flex-start;
	gap: 32px;
	max-width: 1200px;
	width: 100%;
	max-height: 90vh;
}

#lb-img-wrap {
	flex-shrink: 0;
	max-width: 68%;
	display: flex;
	align-items: center;
	justify-content: center;
}

#lightbox-img {
	max-height: 85vh;
	max-width: 100%;
	object-fit: contain;
	display: block;
	opacity: 0;
	transition: opacity 0.4s ease;
}

#lightbox-img.loaded { opacity: 1; }

/* Metadata panel */
#lightbox-meta {
	flex: 1;
	padding-top: 8px;
	display: flex;
	flex-direction: column;
	gap: 10px;
	overflow-y: auto;
	max-height: 85vh;
}

#lb-title {
	font-size: 18px;
	line-height: 1.4;
	color: var(--text);
}

#lb-artist {
	font-size: 13px;
	color: var(--accent);
	letter-spacing: 0.04em;
	line-height: 1.5;
}

#lb-date, #lb-medium {
	font-size: 12px;
	color: var(--muted);
}

#lb-origin {
	font-size: 11px;
	color: var(--muted);
	letter-spacing: 0.04em;
	text-transform: uppercase;
}

#lb-dimensions {
	font-size: 11px;
	color: var(--muted);
}

#lb-description {
	font-size: 12px;
	color: rgba(232,230,224,0.55);
	line-height: 1.65;
	border-top: 1px solid var(--border);
	padding-top: 10px;
	margin-top: 4px;
}

.lb-footer {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-top: auto;
	padding-top: 14px;
	border-top: 1px solid var(--border);
	gap: 12px;
}

#lb-link {
	font-size: 11px;
	color: var(--muted);
	text-decoration: none;
	letter-spacing: 0.06em;
	transition: color 0.2s;
}

#lb-link:hover { color: var(--text); }

#lb-counter {
	font-size: 10px;
	color: var(--muted);
	letter-spacing: 0.06em;
	white-space: nowrap;
}

/* Mobile lightbox */
@media (max-width: 700px) {
	#lightbox { padding: 20px 12px; }
	#lb-prev  { left: 4px; }
	#lb-next  { right: 4px; }
	#lightbox-inner {
		flex-direction: column;
		align-items: center;
	}
	#lb-img-wrap { max-width: 100%; }
	#lightbox-img { max-height: 50vh; }
	#lightbox-meta { max-height: none; }
}

/* ── Fade-in for new grid items ──────────────────────────── */
@keyframes fadeUp {
	from { opacity: 0; transform: translateY(10px); }
	to   { opacity: 1; transform: translateY(0); }
}

.gallery-item { animation: fadeUp 0.45s ease both; }