.header {
    color: white;
    background: black; /*fallback for non-CSS3 browsers*/
    background: -webkit-gradient(linear, 0 0, 0 100%, from(#000000) to(#ffffff)); /*old webkit*/
    background: -webkit-linear-gradient(left, #000000, #ffffff); /*newer webkit*/
    background: -moz-linear-gradient(left, #000000, #ffffff); /*old gecko*/
    background: -o-linear-gradient(left, #000000, #ffffff); /*opera 11.10+*/
    background: linear-gradient(to right, #000000, #ffffff); /*firefox 16+, chrome 26+, IE10+, opera 12.10+, future browsers*/
    -pie-background: linear-gradient(left, #000000, #ffffff); /*ie 6-9 via PIE*/
}