body{
    font-family: 'Orbitron', sans-serif;
    background-color: #000;
    color:#fff;
    }

    .column {
           
            width: 100%;
            text-align: center;
            }

        .row {
    display: table;
    clear: both;
    text-align: center;
}

#start{
    font-size:40px;
    font-weight: bold;
    text-align: center;
}

#rules{
    text-align: center;
    font-size:25px;
    letter-spacing: 1px;
}

div.a {
    text-align: center;
    clear: auto;
    margin-top:25px;
    letter-spacing: 1px;
}
div.b {
    text-align: center;
}
div.c {
    font-size: 30px;
    text-align: center;
    color: yellow;
    letter-spacing: 1px;
}