.student-table {
    width: 90%;
    margin: 20px auto;
    border-collapse: separate;
    border-spacing: 0 8px; /* adds vertical spacing between rows */
    font-family: Arial, sans-serif;
}

.student-table th,
.student-table td {
    border: 1px solid #ccc;
    padding: 12px 20px; /* more horizontal padding */
    vertical-align: middle;
}

.student-table th {
    background-color: #f2f2f2;
    text-align: left;
}

.student-table td:nth-child(1) {
    text-align: center;
    font-weight: bold;
    width: 60px;
}

.student-table td:nth-child(2),
.student-table td:nth-child(3) {
    width: 200px;
}

.student-table td:nth-child(4) {
    width: 250px;
}