.seminarpanel{
    float: left;
    width: 300px;
    height: 250px;
    border: solid 1px black;
    border-radius: 10px;
    padding: 5px 10px 5px 10px;
    margin: 0 2% 20px 0;
    text-align: left;
}


@media screen and (max-width: 980px) , (max-device-aspect-ratio:1/1) {
    .seminarpanel {
        width: 90%;
    }
}