body {
    margin: 0 2px 0 2px;
    max-width: 900px;
    min-width: 300px;
}

#board table {
    background-color: #070;
    width: 100%;
}

#board td {
    border-collapse: separate;
    border: 2px solid #070;
    padding-bottom: 15%; /* = width for a square aspect ratio */
    background: #ddd;
    border-radius: 50%;
}

#board td.red {
    background: #a00;
    border-width: 2px;
}

#board td.blue {
    background: #00a;
    border-width: 2px;
}

button {
    font-size: 30px !important;
    display: block;
    width: 100%;
    margin: 5px 0 5px 0;
}

input {
    font-size: 20px;
    width: 100%;
}

label {
    display: inline-block;
    width: 140px;
    font-size: 20px;
    margin: 5px 0 5px 0;
    text-align: left;
}

select {
    width: 900px;
}