*	{
		margin:0;
		padding:0;
		font-family: 'Helevetica', Arial, sans-serif;
}	

h1, h2, h3 {
	font-weight: bold;
}

/* Title section */

header {
	text-align:center;
	margin-top:20px;
	margin-bottom:50px;
}

/* Main */

main {
	margin:20px;
	margin-top:50px;
	background-color:white;
}

/* Navigation */

nav {
	background-color:magenta; 
	width: 200px;
	padding:20px;
} 

ul {
	list-style-type: none; 
}

nav li {
	font-size: 18pt;
} 
#myDropdown {
	display:none;
}

/* Introduction */

div {
	background-color:yellow;
	padding:20px;
	margin-bottom:50px;
} 

img {
	width:25%;
} 

/* Article */

article {
	margin-bottom:50px;
}

/* Footer */

footer {
	background-color:red;
	padding:20px; 
	margin-top:20px; 
} 

footer p { 
	margin-bottom:50px; 
 }