.block {
    background-color: dodgerblue;
    width: 600px;
    height: 250px;
    position: absolute;
    left: 400px;
    top: 200px;
}

.btn {
    background-color: DodgerBlue;
    border: none;
    color: white;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 20px;
    text-decoration: none;
}


/* Darker background on mouse-over */

.btn:hover {
    background-color: RoyalBlue;
}

.btn2 {
    background-color: DodgerBlue;
    border: none;
    color: white;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 20px;
    text-decoration: none;
}


/* Darker background on mouse-over */

.btn2:hover {
    background-color: RoyalBlue;
}

.btn3 {
    background-color: DodgerBlue;
    border: none;
    color: white;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 20px;
    text-decoration: none;
}


/* Darker background on mouse-over */

.btn3:hover {
    background-color: RoyalBlue;
}

@media screen and (max-width: 1200px) {
    .block {
        display: none;
    }
    .btn2 {
        display: none;
    }
}