div#qr-screen{z-index:200000;z-index:2147483647;width:100vw;height:100vh;display:none;position:fixed;top:0;left:0}#video{object-fit:cover;width:100%;height:100%;position:absolute;top:0;left:0}#corner-nw,#corner-no,#corner-so,#corner-sw{border:6px solid #fff;width:30px;height:30px;position:fixed}#corner-nw{border-bottom:0;border-right:0;-moz-border-top-left-radius:20px;border-top-left-radius:20px;top:20px;left:20px}#corner-no{border-bottom:0;border-left:0;-moz-border-top-right-radius:20px;border-top-right-radius:20px;top:20px;right:20px}#corner-so{border-top:0;border-left:0;-moz-border-bottom-right-radius:20px;border-bottom-right-radius:20px;bottom:20px;right:20px}#corner-sw{border-top:0;border-right:0;-moz-border-bottom-left-radius:20px;border-bottom-left-radius:20px;bottom:20px;left:20px}