.button_with_bg{background-attachment:fixed;padding:300px 20px;position:relative;text-align:center}.button_with_bg:before{background:#000;content:"";height:100%;left:0;opacity:.5;position:absolute;top:0;width:100%}.button_with_bg .button-wrapper{position:relative}@media(max-width:767px){.button_with_bg{padding:150px 20px}}