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

.grades-table, td, th {
    border: 1px solid black;
}

.grades-table :nth-of-type(1) {
    padding-left: 5px;
    background-color: #f2f2f2;
}

.grades-table td:nth-of-type(2) {
    padding-left: 5px;
    background-color: #cccccc;
}