$social-link-size: floor($line-height-base * 1.5) !default;

$social-links: () !default;
$social-links: map-merge((
  facebook:     #3B5998,
  twitter:      #00ACED,
  linkedin:     #007BB6,
  youtube:      #CD201F,
  // google-plus is actually #DD4B39, but we're using gray instead
  google-plus:  #4B4B4B
), $social-links);