#floatBtn {
    position: fixed;
    bottom: 45px;
    right: 17px;
    height: 50px;
    border-radius: 25px;
    font-size: 28px;
}

@media (max-width: 992px) {
    #floatBtn {
        bottom: 50px;
        right: 10px;
        height: 45px;
        border-radius: 20px;
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    #floatBtn {
        bottom: 57px;
        right: 5px;
        height: 43px;
        border-radius: 15px;
        font-size: 20px;
    }
}