.bt,body,input{color:#fff}.sm{text-shadow:2px 2px #000}body{background:#212121;font-family:arial}input{background:#000;border:1px solid gray;padding:5px;border-radius:3px}h2{color:#ff0}.xc{text-align:center}.bt{background:green;padding:10px;border-radius:3px;font-weight:600;margin:3px;border:1px solid #000}.bt:hover{background:red}.bt:disabled{color:maroon;background:gray}