.background {
    width: 100%;
    height: 100%;
    
    background-size: cover;
    background-color: #f9f9f9;
    background-position: center center;
    float: left;
    width: 100%;
}

.shadow3, .shadow300 {
    box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.3) inset;
    -moz-box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.3) inset;
    -webkit-box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.3) inset;
}

.shadow3, .shadow400 {
    box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.4) inset;
    -moz-box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.4) inset;
    -webkit-box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.4) inset;
}

.shadow6, .shadow600 {
    box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.6) inset;
    -moz-box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.6) inset;
    -webkit-box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.6) inset;
}

.shadow3, .shadow800 {
    box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.8) inset;
    -moz-box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.8) inset;
    -webkit-box-shadow: 0 10000px 0 0 rgba(0, 0, 0, 0.8) inset;
}