.overlay {
  background: -webkit-linear-gradient(#2283C5,#2292E1); /* For Safari 5.1 to 6.0 */
  background: -o-linear-gradient(#2283C5,#2292E1); /* For Opera 11.1 to 12.0 */
  background: -moz-linear-gradient(#2283C5,#2292E1); /* For Firefox 3.6 to 15 */
  background: linear-gradient(#2283C5,#2292E1); /* Standard syntax */ 
}