form#twhfc-settings {
    float: left;
    width: 65%;
}

.twhfc-infos {
    float: right;
    width: 30%;
    max-width: 280px;
    min-width: auto !important;
    margin-left: 5%;
}

@media only screen and (max-width: 800px) {
    form#twhfc-settings {
        float: none;
        width: 100%;
    }

    .twhfc-infos {
        float: none;
        width: 100%;
        max-width: 100%;
        margin-top: 30px;
        margin-left: 0;
    }
}