.table-demo {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
}
.table-demo th {
    background-color: #2196f3;
    color: white;
    padding: 12px;
    text-align: left;
}
.table-demo td {
    padding: 12px;
    border-bottom: 1px solid #e0e0e0;
}
.table-demo tr:nth-of-type(odd) {
    background-color: #f8f9fa;
}
.table-demo tr:nth-of-type(even) {
    background-color: #ffffff;
}
.table-demo tr:nth-of-type(5n) {
    background-color: #fff3e0;
    border-left: 4px solid #ff9800;
    font-weight: bold;
}