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

html, body {
	height: 100%;
}

body {
	max-width: 1280px;
	margin: 0 auto;
	background: yellow;
	color: white;
	font-family: "Comic Relief", system-ui;
}

#grid-wrapper {
	display: grid;
	height: 100%;
	grid-template-rows: 5em auto 1fr;
	grid-template-columns: 200px 1fr;
}

header {
	grid-row: 1;
	grid-column: 1 / 3;
	display: flex;
	justify-content: center;
	align-items: center;
	background: brown;
}

header h1 {
	font-size: 2em;
	margin: 0;
}

nav {
	grid-row: 2;
	grid-column: 1 / 3;
	background: gray;
}

nav ul {
	margin: 0 1em;
	padding: 1.3em 0;
}

nav ul li {
	margin: 0.7em;
}

section {
	grid-row: 3;
	grid-column: 1 / 3;
	padding: 1.5em;
	background-color: darkblue;
}

section > h1, section > h2 {
	margin: 0;
}

#gallery {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
}

#gallery a {
	line-height: 0;
}

@media only screen and (min-width: 600px) {
	#grid-wrapper {
		grid-template-rows: 5em 1fr;
	}
	nav {
		grid-row: 2;
		grid-column: 1;
	}
	section {
		grid-row: 2;
		grid-column: 2;
	}
	#gallery img {
		width: 255px;
		height: auto;
	}
}