body {
    color: black;
    font-family: 'Source Sans Pro', sans-serif;
}

.header { text-align: center; }

.header img { height: 100px; }

.background {
    -ms-background-size: cover;
    background: #fff url('/images/largebackgroundclouds.jpg') no-repeat;
    background-size: cover;
    bottom: 0;
    position: absolute;
    top: 100px;
    width: 100%;
}