style.css

table {
    border: 2px solid #333333;
}

table td, th {
    border: 1px solid #333333;
}

table.greyGridTable {
    border: 2px solid #ffffff;
    width: 100%;
    text-align: center;
    border-collapse: collapse;
}
table.greyGridTable td, table.greyGridTable th {
    border: 1px solid #FFFFFF;
    padding: 3px 4px;
    text-align: left;
}
table.greyGridTable tbody td {
    font-size: 13px;
}
table.greyGridTable td:nth-child(even) {
    background: #EBEBEB;
}
table.greyGridTable thead {
    background: #FFFFFF;
    border-bottom: 4px solid #333333;
}
table.greyGridTable thead th {
    font-size: 15px;
    font-weight: bold;
    color: #333333;
    text-align: center;
    border-left: 2px solid #333333;
}
table.greyGridTable thead th:first-child {
    border-left: none;
}

table.greyGridTable tfoot {
    font-size: 14px;
    font-weight: bold;
    color: #333333;
    border-top: 4px solid #333333;
}
table.greyGridTable tfoot td {
    font-size: 14px;
}