html,
body {
	margin: 0;
	padding: 0;
	font-family: Arial, Helvetica, sans-serif;
	height: 100vh;
}

body {
	background: linear-gradient(to bottom right, #15ffe0, #ff23ff) no-repeat;
}

h1 {
	text-align: center;
}

h1,
a {
	color: #ffffff;
}

a {
	text-decoration: none;
	border-bottom: 2px solid #007bff;
	transition: all 0.3s ease;
}

a:hover {
	color: #007bff;
	border-bottom: 2px solid #333;
}

nav {
	display: flex;
	justify-content: center;
}

ul {
	list-style: none;
	margin: 0;
	padding: 0;
}

li {
	margin: 0 10px;
}

li:first-child {
	margin-left: 0;
}

li:last-child {
	margin-right: 0;
}

header {
	position: absolute;
	transform: translate(-50%, -50%);
	top: 50%;
	left: 50%;
}