.pmc-settings {
    max-width: 800px;
}

.pmc-settings table.form-table th {
    width: 260px;
}

.pmc-settings input[type="text"],
.pmc-settings select {
    min-width: 260px;
}

@media (max-width: 782px) {
    .pmc-settings table.form-table th {
        width: auto;
    }
}