body {
	margin: 60px auto;
	width: 100%;
}
nav ul li, footer ul li {
    display: inline;
    margin-right: 20px;
}
div.about, div.head {
    padding-left: 30%;
	padding-right: 15%;
}
a {
    text-decoration: none;
    color: #999;
}
a:hover {
    text-decoration: underline;
}
div#back_ground { 
	position:fixed; 
	top:0; 
	left:0; 
	bottom:0; 
	right:0; 
	z-index:-1; 
} 
div#back_ground > img { 
	height:100%; 
	width:100%; 
	border:0; 
} 
div#home > img {
	width:100px;
	height:100px;
	border-radius:100px
}
nav ul, footer ul {
    font-family:'Helvetica', 'Arial', 'Sans-Serif';
    padding: 0px;
    list-style: none;
    font-weight: bold;
}
h1 {
	font-family: 'Helvetica', 'Arial', 'Sans-Serif';
}
footer ul{
	margin: 20% auto 20px;
}