.phpfb-popover-backdrop{position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,.7);transition:opacity 500ms ease-in-out;z-index:999}.phpfb-popover-backdrop[data-hidden="true"]{display:none;opacity:0}.phpfb-popover-backdrop[data-hidden="false"]{display:block;opacity:1}