table-demo {
    border: 1px solid #ddd;
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 2em;
}

.table-demo th,
.table-demo td {
    padding: 10px;
    border: 1px solid #ddd;
}

.table-demo th {
    background-color: #f5f5f5;
}

@media screen and (min-width: 600px) {
    .table-demo th {
        width: 20%;
    }

    .table-demo td {
        width: 80%;
    }
}