/* Code adapted from "CSS Grid Layout #1: Responsive Masonry
" by Saief Al Emon on CodePen: https://codepen.io/iamsaief/pen/jObaoKo */

/* Reset CSS */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
:root{
	--bg-1: #190f2c;
	--bg-2: #200b30;
	--accent: #7ee7ff;
	--btn-bg: rgba(255,255,255,0.06);
	--btn-hover: rgba(255,255,255,0.12);
	--glass: rgba(255,255,255,0.04);
	--shadow: 0 10px 30px rgba(0,0,0,0.5);
	--ease: cubic-bezier(.2,.9,.3,1);
}
html,
body {
	background: linear-gradient(45deg, var(--bg-1), var(--bg-2));
	padding: 15px;
	font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
	color: #fff;
}
img {
	max-width: 100%;
	height: auto;
	vertical-align: middle;
	display: inline-block;
	-webkit-user-drag: none;
	user-select: none;
}

/* Main CSS */
.grid-wrapper > div {
	display: flex;
	justify-content: center;
	align-items: center;
	position: relative;
	overflow: hidden;
	border-radius: 6px;
	background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.02));
	transition: transform 320ms var(--ease), box-shadow 320ms var(--ease);
	will-change: transform;
	cursor: pointer;
}

/* Hover animations for tiles */
.grid-wrapper > div:hover {
	transform: translateY(-8px) scale(1.02);
	box-shadow: 0 18px 40px rgba(0,0,0,0.55);
}
.grid-wrapper > div:active {
	transform: translateY(-4px) scale(0.995);
}

/* subtle image reveal on hover */
.grid-wrapper > div > img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	border-radius: 5px;
	transform-origin: center;
	transition: transform 420ms var(--ease), filter 420ms var(--ease);
}
.grid-wrapper > div:hover > img {
	transform: scale(1.05) rotate(-0.5deg);
	filter: saturate(1.05) contrast(1.03);
}

/* overlay icon that appears on hover */
.grid-wrapper > div::after {
	content: "🔍";
	position: absolute;
	inset: auto;
	top: 10px;
	right: 10px;
	font-size: 18px;
	padding: 8px;
	border-radius: 8px;
	background: transparent;
	opacity: 0;
	transform: translateY(-6px) scale(.95);
	transition: opacity 240ms var(--ease), transform 240ms var(--ease), background 240ms var(--ease);
	backdrop-filter: blur(2px);
}
.grid-wrapper > div:hover::after {
	opacity: 0.95;
	transform: translateY(0) scale(1);
	background: var(--btn-bg);
}

/* grid layout (kept from original) */
.grid-wrapper {
	display: grid;
	grid-gap: 10px;
	grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	grid-auto-rows: 200px;
	grid-auto-flow: dense;
}
.grid-wrapper .wide {
	grid-column: span 2;
}
.grid-wrapper .tall {
	grid-row: span 2;
}
.grid-wrapper .big {
	grid-column: span 2;
	grid-row: span 2;
}

/* ---- Lightbox styles ---- */
.lb-overlay {
	position: fixed;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	background: radial-gradient(ellipse at center, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0.85) 60%), rgba(8,8,12,0.9);
	z-index: 9999;
	opacity: 0;
	pointer-events: none;
	transition: opacity 280ms var(--ease);
}

/* toggle class .open to show */
.lb-overlay.open {
	opacity: 1;
	pointer-events: auto;
}

/* lightbox content container */
.lb-content {
	position: relative;
	max-width: min(1100px, 95vw);
	max-height: 90vh;
	width: min(95vw, 1100px);
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 18px;
}

/* the displayed image */
.lb-image {
	max-width: 100%;
	max-height: 80vh;
	border-radius: 8px;
	box-shadow: var(--shadow);
	transition: transform 360ms var(--ease), opacity 260ms var(--ease);
	transform: translateY(6px) scale(.995);
	opacity: 0;
	object-fit: contain;
	background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.02));
}

/* when overlay is open, animate image in */
.lb-overlay.open .lb-image {
	transform: translateY(0) scale(1);
	opacity: 1;
}

/* Controls: prev / next / close / download */
.lb-btn {
	position: absolute;
	display: inline-grid;
	place-items: center;
	width: 48px;
	height: 48px;
	background: var(--btn-bg);
	color: #fff;
	border-radius: 999px;
	border: 1px solid rgba(255,255,255,0.06);
	box-shadow: 0 8px 20px rgba(0,0,0,0.45);
	transition: transform 200ms var(--ease), background 160ms, box-shadow 200ms;
	cursor: pointer;
	user-select: none;
}

/* hover/focus states for buttons */
.lb-btn:hover,
.lb-btn:focus {
	transform: translateY(-3px);
	background: var(--btn-hover);
	box-shadow: 0 14px 30px rgba(0,0,0,0.55);
	outline: none;
}

/* prev / next positions */
.lb-prev {
	left: 12px;
	top: 50%;
	transform: translateY(-50%);
}
.lb-next {
	right: 12px;
	top: 50%;
	transform: translateY(-50%);
}

/* close / download positions (corner) */
.lb-close {
	right: 12px;
	top: 12px;
	width: 40px;
	height: 40px;
}
.lb-download {
	right: 12px;
	bottom: 12px;
	width: 48px;
	height: 48px;
}

/* disabled state for prev/next */
.lb-btn.disabled {
	opacity: 0.45;
	pointer-events: none;
	transform: none;
}

/* caption area (optional) */
.lb-caption {
	position: absolute;
	left: 24px;
	bottom: 20px;
	right: 24px;
	color: rgba(255,255,255,0.85);
	font-size: 14px;
	text-align: center;
	pointer-events: none;
	opacity: 0.95;
}

/* small helper (keyboard hint) */
.lb-hint {
	position: absolute;
	left: 50%;
	transform: translateX(-50%);
	bottom: -36px;
	font-size: 12px;
	color: rgba(255,255,255,0.55);
}

/* responsive adjustments */
@media (max-width: 640px) {
	.lb-prev, .lb-next {
		display: none; /* rely on swipe/tap on mobile or the download/close controls */
	}
	.lb-content {
		padding: 8px;
	}
	.lb-download {
		right: 8px;
		bottom: 8px;
	}
}

/* accessibility focus ring for keyboard users */
.lb-btn:focus-visible {
	box-shadow: 0 0 0 3px rgba(126,231,255,0.12), 0 12px 30px rgba(0,0,0,0.6);
}

/* small fade for overlay background when toggling */
@keyframes lb-fade {
	from { opacity: 0; transform: scale(.995); }
	to { opacity: 1; transform: scale(1); }
}
.lb-overlay.open .lb-content {
	animation: lb-fade 240ms var(--ease) both;
}

/* Utility: visually hidden (for screen reader text in buttons) */
.sr-only {
	position: absolute !important;
	width: 1px; height: 1px;
	padding: 0; margin: -1px;
	overflow: hidden; clip: rect(0,0,0,0);
	white-space: nowrap; border: 0;
}