.ptd-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 14px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.ptd-table th,
.ptd-table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}

.ptd-table th {
    background-color: #4a90e2;
    color: #fff;
    font-weight: 600;
    text-align: center;
}

.ptd-table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

.ptd-table tbody tr:hover {
    background-color: #f0f7ff;
    transition: background-color 0.2s ease;
}

.ptd-table td {
    vertical-align: top;
}

/* レスポンシブ対応 */
@media screen and (max-width: 768px) {
    .ptd-table {
        font-size: 12px;
    }
    
    .ptd-table th,
    .ptd-table td {
        padding: 8px 4px;
    }
    
    .ptd-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}