*
{
    box-sizing: border-box;
}

body
{
    font-family: arial;
    background: grey;
}

div.column
{
    background:darkgrey;
    float: left;
    width: 50%;
}

div#humanDice, div#computerDice 
{
    background: white;
    font-size: 0;

}

div#humanDice > img, div#computerDice > img
{
    width: calc(100% / 6);
    background: white;
}

table
{
    border-collapse: collapse;
    width: 100%;
}

table, tr, td
{
    margin-top: 20px;
    border: 1px solid black;
}