.tb{
    border-collapse: collapse;
    width: 80%;
    max-width: 1000px;
    background-color: white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.tb th {
    padding: 15px;
    text-align: left;
    font-size: 18px;
    border-bottom: 1px solid #e0e0e0;
}

.tb td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
    border-left: 1px solid #e0e0e0;
}

.tb tr:hover {
    background-color: #f1f1f1;
}

.tb td:first-child {
    background-color: #f7f7f7;
    font-weight: bold;
}

.tb tr:last-child td,th{
    border-bottom: none;
}