#help-button-desktop {
    background-color: lightgray;
    margin: 10px;
    width: 1.5em;
    height: 1.5em;
    border-radius: 100%;
    text-align: center;
    float: right;
    font-weight: 900;
	font-size:1.5em;
	display:block;
}

#help-button-desktop:hover {
    background-color: white;
}

#help-button-mobile:hover {
	background-color:darkgrey;
}

@media only screen and (min-width: 991.97px) {

a #help-button-mobile {
	display:none;
	visibility: hidden;
}

}

@media only screen and (max-width: 991.98px) {

a #help-button-mobile {
    background-color: lightgray;
    margin: 10px;
    width: 1.5em;
    height: 1.5em;
    border-radius: 100%;
    text-align: center;
    float: right;
    font-weight: 900;
	font-size:1.5em;
	display:block;
}

a #help-button-desktop {
	display:none;
	visibility: hidden;	
}

}