body {
    background: #E5ECF3 none repeat scroll 0 0;
    text-align: center;
}

div {
    display: inline;
    float:none;
    font-family: sans-serif;
}

div.container {
    margin-top:15%;
    margin-bottom:15%;
    margin-left:15%;
    margin-right:15%;
    height:70%;
    width:70%;
}

div a img {
    margin:10px;
    border-style:none;
    height:auto;
    max-height:400px;
    max-width:400px;
    vertical-align: middle;
}