* {
    box-sizing: border-box;
}

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

img.humanDice,
img.computerDice {
    width: calc(100% / 6);
}

.winner {
    background-color: green;
    border: 1px solid blue;
    font-family: Cursive;
}

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

table,
tr,
td {
    border: 1px solid black;
}