*{
	padding: 0;
	margin: 0;
	border: 0;
}
header{
	width: 100%;
}
.imgprincipal{
	height: 100px;
	width: 100%;
	opacity: 100%;
}
body{
	margin: 0;
}
main{
	float: left;
	width: 70%;
	height: 600px;
}
.h1{
	color: green;
	padding-left: 0px;
}
section{
	padding-bottom: 100px;
}
aside{
	float: right;
	width: 25%;
	height: 600px;
}
footer{
	position: fixed;
	bottom:0;
    width:100%;
    height:30px; 
	background-color: lightgreen;
	color: white;
	text-align: center;
}
.imagem{
	width: 300px;
	height: 200px;
}