Add back to top in Genesis

backToTop.css

/* ## Back to top
--------------------------------------------- */
.eemi-top:hover {
    color: #fff !important;
    background-color: rgba(0,0,0,0.8);
    text-decoration: none;
}

.eemi-top {
    display: none;
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    width: 3.2rem;
    height: 3.2rem;
    line-height: 3.2rem;
    font-size: 1.4rem;
    color: #fff;
    background-color: rgba(0,0,0,0.3);
    text-decoration: none;
    border-radius: 3.2rem;
    text-align: center;
    cursor: pointer;
}

backToTop.js

jQuery(document).ready(function ($) {
    // Back to top
    var offset = 220;
    var duration = 500;
    $(window).scroll(function() {
        if ($(this).scrollTop() > offset) {
            $('.eemi-top').fadeIn(duration);
        } else {
            $('.eemi-top').fadeOut(duration);
        }
    });

    $('.eemi-top').click(function(event) {
        event.preventDefault();
        $('html, body').animate({scrollTop: 0}, duration);
        return false;
    })

});

functions.php

<?php
/**
 * Back to top
 */
add_action( 'genesis_before', 'eemi_backToTop');
function eemi_backToTop()
{
	if( !is_front_page() )
		echo '<a href="#" class="eemi-top">↑</a>';
}