#pagewrap {
margin: 0 auto;
width: 600px;
padding-left: 150px;
position: relative;
}
/*Back to top button*/
#back-top {
position: fixed;
bottom: 30px;
margin-left: -150px;
}
#back-top a {
width: 108px;
display: block;
text-align: center;
font: 11px/100% Arial, Helvetica, sans-serif;
text-transform: uppercase;
text-decoration: none;
color: #bbb;
/* background color transition */
-webkit-transition: 1s;
-moz-transition: 1s;
transition: 1s;
}
#back-top a:hover {
color: #000;
}
/* arrow icon (span tag) */
#back-top span {
width: 108px;
height: 108px;
display: block;
margin-bottom: 7px;
background: #ddd url(up-arrow.png) no-repeat center center;
/* rounded corners */
-webkit-border-radius: 15px;
-moz-border-radius: 15px;
border-radius: 15px;
/* background color transition */
-webkit-transition: 1s;
-moz-transition: 1s;
transition: 1s;
}
#back-top a:hover span {
background-color: #777;
}