body { 
	font-family: Arial, sans-serif; 
	line-height: 1.6; 
	margin: 0; 
	padding: 0; 
} 

header { 
	background-color: green; 
	color: #fff; 
	text-align: center; 
	padding: 1rem; 
} 

nav { 
	background-color: #555; 
	text-align: center; 
} 

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

nav li { 
	display: inline-block; 
	padding: 1rem; 
} 

nav a { 
	color: #fff; 
	text-decoration: none; 
} 

main { 
	padding: 2rem; 
} 

section { 
	margin-bottom: 2rem; 
} 

footer { 
	background-color: #333; 
	color: #fff; 
	text-align: center; 
	padding: 1rem; 
}