main {
    padding: 25px;
}

table {
    position: relative;
}

table tr td {
    background-color: #acbff3;
    border-top: 2px solid #E0E0E0;
    border-left: 2px solid #E0E0E0;
    border-right: 3px solid #505050;
    border-bottom: 3px solid #505050;

    height: 75px;
    width: 75px;

    text-align: center;
    font-size: 200%;
    font-weight: bold;

    position: absolute;
}