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

body {
	font-family: system-ui, sans-serif;
	background: #0f0f12;
	color: #fff;
	padding: 40px;
}

h1 {
	text-align: center;
	margin-bottom: 40px;
	font-weight: 600;
}

.collage {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
	gap: 16px;
	max-width: 1200px;
	margin: 0 auto;
}

.collage img {
	width: 100%;
	aspect-ratio: 4 / 3;
	object-fit: cover;
	border-radius: 14px;
	opacity: 0;
	transform: translateY(30px) scale(0.96);

	transition:
		opacity 0.6s ease,
		transform 0.6s cubic-bezier(.2,.8,.2,1),
		box-shadow 0.4s ease,
		filter 0.4s ease;

	will-change: transform, opacity;
	filter: grayscale(1);
}

.collage img.is-visible {
	opacity: 1;
	transform: translateY(0) scale(1);
}
.collage img:hover {
	transform: scale(1.06);
	box-shadow: 0 25px 50px rgba(0, 0, 0, 0.45);
	z-index: 2;
	filter: grayscale(0);
}
@media (max-width: 600px) {
	body { padding: 20px; }
	h1 { font-size: 1.4rem; }
}