@media only screen and (orientation:portrait){
  body {
    height: 100vw;
    transform: rotate(90deg);
  }
}

table{
            width:100%;
            font-size:200%;
        }
        table{
                border-collapse: collapse;
        }
        td, th{
                border:1px solid black;
        }
	td 
	{
		text-align: center; 
		vertical-align: middle;
		}
        tr:nth-child(even) {background: #CCC}
        tr:nth-child(odd) {background: #FFF}