body { font-family:sans-serif; text-align:center; margin:20px; }
button { font-size:20px; padding:10px 20px; margin:10px; }
.stats { margin:10px; font-weight:bold; }
.hidden { display:none; }
.modal { position:fixed; top:0; left:0; right:0; bottom:0; background:rgba(0,0,0,0.6); display:flex; align-items:center; justify-content:center; }
.modal .box { background:#fff; padding:20px; border-radius:10px; }