@media all and (max-width:640px) {
    .header {
        height: 60px !important;
    }

    footer {
        /*position: absolute;*/
        bottom: 0 !important;
        width: 100%;
        /*display:none !important*/
    }
}

@media all and (max-width:480px) {
    .header {
        height: 60px !important;
    }
}