.wave-header{background-color:#bfdbfee6;min-height:96px;position:relative;z-index:50}.wave-header:before{background-image:url(../images/wave/wave.png);background-position:50%;background-repeat:repeat-x;background-size:auto 100%;bottom:0;content:"";height:40px;left:0;opacity:.5;position:absolute;right:0;top:20px;z-index:-1}