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

body {
	background-color: #f7f7f7;
	font: 1.2rem Arial, Helvetica, sans-serif;
}

nav#navbar {
	position: fixed;
	top: 0;
}

section {
	width: 100%;
	height: 500px;
}

#welcome-section {
	height: 100vh;
	background-color: #333;
}

@media (max-width: 600px){
	body {
		background-color: red;
	}
}