style.css

body { font-family: 'sans'; background-color: #000; color: #fff; text-align: center; padding: 0px; overflow-y: hidden; }
circle { background-color: #aaa; color: #000; border-radius: 50%; position: fixed; }
menu { position: absolute; width: 400px; height: 95%; left: 50%; margin-left: -200px; text-align: left; padding: 0px; top: 0px; }
slab { background-color: #777; color: #000; font-size: 210px; position: absolute; top: 50%; cursor: pointer; width: 100%; }
slab:hover { background-color: #aaa; }
slab:active { background-color: #fff; }
.inactive slab { background-color: #222; cursor: none; }
score { font-size: 16px; color: #000; }
score.new { color: #fff; animation: blinker 0.4s linear infinite; }
@keyframes blinker { 20% { color: #888; } }
.lb { position: absolute; left: -1px; bottom: -3px;}
.lt { position: absolute; left: -1px; top: -3px;}
.rb { position: absolute; right: -1px; bottom: -3px;}
.rt { position: absolute; right: -1px; top: -3px;}