html * {box-sizing:border-box;}

body {
	margin: 0;
	font-family: Arial, sans-serif;
	background: #181818;
	color: #fff;
}

header {
	position: relative;
	background-color: #ddd;
	min-height: 180px;
	height: 35vw;
	max-height: 300px;
	display: flex;
	align-items: center;
	justify-content: center;
	overflow: hidden;
}

.header-collage {
	display: flex;
	gap: 10px;
	justify-content: center;
	align-items: center;
	background: #222;
	padding: 10px 0;
	position: absolute;
	top: 0; left: 0; right: 0; bottom: 0;
	width: 100%;
	height: 100%;
	display: flex;
	flex-direction: row;
	z-index: 1;
}

.header-collage img {
	width: 33.33%;
	height: 100%;
	object-fit: cover;
	opacity: 0.5;
}

header h1 {
	position: relative;
	z-index: 2;
	text-align: center;
	margin: 0.5em 0;
	font-size: 2.5rem;
	line-height: 1.2;
	padding: 1em 2em;
	background: rgba(255,255,255,0.8); /*semi-transparent white background*/
	border-radius: 1em;
	box-shadow: 0 2px 16px rgba(0,0,0,0.2);
	color: #222 !important;
	display: block !important;
	visibility: visible !important;
	max-width: 80%;
}

.main-nav {
	display: flex;
	justify-content: center;
	gap: 1em;
	margin-bottom: 1em;
}

.main-nav a {
	background: #444;
	color: #fff;
	padding: 0.5em 1em;
	border-radius: 4px;
	text-decoration: none;
	transition: background 0.2s;
}
.main-nav a:hover {
	background: #666;
}

.grid-container {
    display: grid;
    grid-gap: 5px;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: repeat(4, minmax(220px, auto));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2em 1em;
}

.grid-item {
	position: relative;
	display: flex;
	flex-direction: column;
	justify-content: center;
	padding: 1.5em;
	border-radius: 12px;
	min-height: 220px;
	box-sizing: border-box;
}

.details-bg {
	color: #fff;
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
	background-blend-mode: multiply;
	background-color: rgba(30, 30, 30, 0.7);
	box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.details-bg details {
	background: rgba(20, 20, 20, 0.85);
	padding: 1em;
	border-radius: 8px;
}

.image-cell {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	background: #232323;
	border-radius: 12px;
	box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.image-cell img {
	max-width: 100%;
	height: auto;
	border-radius: 8px;
	cursor: pointer;
	transition: transform 0.2s;
}
.image-cell img:hover {
	transform: scale(1.04);
}
.image-cell figcaption {
	margin-top: 0.5em;
	color: #ccc;
	font-size: 0.95em;
	text-align: center;
}

@media (max-width: 900px) {

	header {
		min-height: 100px;
		height: 40vw;
		max-height: 180px;
		padding: 1em;
	}
	
	.header-collage img {
		width: 100%;
		height: auto;
	}
	
	.header-collage {
		flex-direction: column;
		gap: 5px;
	}
	
	header h1 {
		font-size: 1.3rem;
		padding: 0.6em 1 em;
		max-width: 95%;
		color: #222 !important;
		display: block !important;
		visibility: visible !important;
	}

	.grid-container {
		grid-template-columns: 1fr;
		grid-template-rows: none;
	}
	.image-cell, .details-bg {
		min-height: 180px;
	}
})


/*
.item-1 {
    grid-area: 1 / 1 / 2 / 2;
}

.item-2 {
    grid-area: 1 / 2 / 2 / 3;
}

.item-3 {
    grid-area: 1 / 3 / 2 / -1;
}

/*.grid-item-4 {
    grid-area: ;
}

.item-5 {
    grid-area: 2 / 1 / 3 / 3;
}

.item-6 {
    grid-area: 2 / 2 / 3 / -1;
}

/*.item-7 {
    grid-area: ;
}

.item-8 {
    grid-area: 3 / 1 / 4 / 3;
}

.item-9 {
    grid-area: 3 / 3 / 4 / -1;
}

/*.item-10 {
    grid-area: ;
}

.item-11 {
    grid-area: 4 / 1 / -1 / 3;
}

.item-12 {
    grid-area: 4 / 2 / -1 / -1;
}