.advertisement {
    margin: 20px;
    padding: 20px;
    background-color: rgb(219, 219, 219);
    border-radius: 5px;
}

.advertisement iframe {
    width: 100%;
    height: 100%;
    border: none;

}

.advertisement img {
    width: 100%;
    height: auto;
    border-radius: 5px;
}