input[type="button"]{
    width:200px;
    height:50px;
    font-size:24px;
}

table.main{
    font-size:24px;
}

table *.blue{
    background-color:#80ffff;
}

table *.yellow{
    background-color:#ffff80;
}

table *.red{
    background-color:#ff8080;
}