:root {
	--backgroundColor: #e7a3a3;
}

* {
	margin: 0;
	padding: 0;
	-webkit-box-sizing: border-box;
	box-sizing: border-box;
	font-family: monospace;
}

body {
	background-color: #e7a3a3;
	background-color: var(--backgroundColor);
	display: grid;
	font-size: 5vmin;
	grid-row-gap: 5px;
	row-gap: 5px;
	grid-template-rows: 1.25em 1fr;
	width: 100vw;
	height: 100vh;
	padding: 15px;
	-webkit-transition: background-color 350ms;
	transition: background-color 350ms;
}

main {
	display: grid;
	justify-self: center;
	-ms-flex-line-pack: center;
	align-content: center;
	-webkit-box-pack: center;
	-ms-flex-pack: center;
	justify-content: center;
	width: 100%;
	height: 100%;
}

header {
	display: -webkit-box;
	display: -ms-flexbox;
	display: flex;
	-webkit-box-orient: horizontal;
	-webkit-box-direction: normal;
	-ms-flex-direction: row;
	flex-direction: row;
	-webkit-box-pack: justify;
	-ms-flex-pack: justify;
	justify-content: space-between;
	-webkit-box-align: center;
	-ms-flex-align: center;
	align-items: center;
	padding: 30px 30px 0 30px;
}
header a {
	position: relative;
	text-decoration: none;
	font-size: 36px;
	-webkit-transition: color 200ms;
	transition: color 200ms;
	color: #0583ff;
}
header a::after {
	-webkit-transition: width 130ms;
	transition: width 130ms;
	position: absolute;
	content: "";
	height: 3px;
	width: 0;
	left: 0;
	bottom: 0;
	z-index: 0;
	background-color: firebrick;
}
header a:hover {
	color: crimson;
}
header a:hover::after {
	width: 100%;
}