.btn-flotante {
    padding: 18px 28px;
    position: fixed;
    bottom: 80px;
    right: 0px;
    transition: all 300ms ease 0ms;
    z-index: 99;
}

@media only screen and (max-width: 600px) {
 	.btn-flotante {
		font-size: 14px;
		padding: 12px 20px;
		bottom: 80px;
		right: -6px;
	}
}