/* CSS */
body { background: black; }
.hide { display: none; }

#grid {    
    width: 900px;
    height: 500px;
    margin: 20px auto;
    border: 5px solid blue;
}

#box { 
    position: relative;
    width: 30px;
    height: 30px;
    top: 0;
    left: 0;
}

button {
    display: block;
    width: 400px;
    height: 100px;
    font-size: 3.0em;
    margin: 180px auto;
}

table {
    border-collapse: collapse;
    border: 3px solid yellow;
    margin: 20px auto;
    width: 700px;
}

td { 
    color: white;
    font-size: 2.5em;
    padding: 5px 10px;
    border: 1px solid white;
}

#about {
    text-align: center;
    color: white;
    font-size: 2.0em;
    width: 900px;
    margin: 0 auto;
}

#about a { color: #f99; }