.overlay{position:fixed;top:0;bottom:0;left:0;right:0;background:rgba(0,0,0,.7);transition:opacity 500ms;visibility:hidden;opacity:0}.overlay:target{visibility:visible;opacity:1}.popup{margin:70px auto;padding:20px;background:#fff;border-radius:5px;width:30%;position:relative;transition:all 5s ease-in-out}.popup h2{margin-top:0;color:#333;font-family:Tahoma,Arial,sans-serif}.popup .close{position:absolute;top:20px;right:30px;transition:all 200ms;font-size:30px;font-weight:bold;text-decoration:none;color:#333}.popup .close:hover{color:#ffa500}.popup .content{position:relative;max-height:30%;overflow:auto}