// #############################################################################
// BACK TO TOP LINK
// #############################################################################
// A purely client-side artefact. The link is a square populated by a single fa
// icon. Size of back-to-top link's 'icon' Should be big enough to hit on a
// mobile. Apple used to recommend ~44px square. The regular size is determined
// by the class fa-5x.
$wc-btt-small: 3rem !default;
