body{position:relative;margin-bottom:25px}img{max-width:100%}.img-block{text-align:center;margin:auto;display:block}header{background:#E8E8E8;background-size:cover;background-position:center 10%;padding:50px 0;color:#555;margin-bottom:50px}header h1{font-weight:300}header p,header small{opacity:.8;margin:0}header small{font-family:monospace}#nav{padding-top:15px}.nav{width:100%}.nav>li+li{margin:0}.nav>li>a{display:block;padding:5px 0;font-size:13px;color:#999;border-right:1px solid #ddd}.nav>li>a:hover,.nav>li>a:focus{background:transparent;color:#333}.nav>li>.nav{display:none;padding-left:15px}.nav>li.active>a{font-weight:bold;color:#333;border-right:1px solid #555}.nav>li.active>.nav{display:block}.nav-title{margin-bottom:10px;text-transform:uppercase;font-size:13px;cursor:default}.affix{top:0;width:255px}@media only screen and (max-width: 768px){#nav{position:static !important}}section{line-height:1.8;font-size:14px;margin-bottom:100px}section img{border-radius:4px}section h1,section h2,section h3{margin-top:0;padding-top:21px}section h2{font-size:40px;font-weight:300;text-align:center;padding-top:50px}section h2+p,section h2+strong{display:block;margin:auto;text-align:center}section h3{font-size:25px;font-weight:600;padding-bottom:15px;margin-bottom:15px;border-bottom:1px solid #ddd;color:#3F51B5}section a{color:#18967E;border-bottom:1px solid #18967E}section a:hover,section a:focus{color:#18967E;text-decoration:none;background-color:#F1F9FB}.subgroup{margin-top:100px}.steps li{margin-bottom:15px}#customize .img-block{border:1px solid #aaa;border-radius:0}