Merge pull request #2904 from XhmikosR/mixins

site/_sass/_font-awesome.scss

@@ -20,24 +20,3 @@
 .fa-link:before {
   content: "\f0c1";
 }
-/*
- * This code is courtesy Ben Balter, modified by Parker Moore for jekyllrb.com
- * http://ben.balter.com/2014/03/13/pages-anchor-links/
- */
-.header-link {
-  position: relative;
-  left: 0.5em;
-  opacity: 0;
-  font-size: 0.8em;
-  -webkit-transition: opacity 0.2s ease-in-out 0.1s;
-  -moz-transition: opacity 0.2s ease-in-out 0.1s;
-  -o-transition: opacity 0.2s ease-in-out 0.1s;
-  transition: opacity 0.2s ease-in-out 0.1s;
-}
-h2:hover .header-link,
-h3:hover .header-link,
-h4:hover .header-link,
-h5:hover .header-link,
-h6:hover .header-link {
-  opacity: 1;
-}

site/_sass/_mixins.scss

@@ -0,0 +1,38 @@
+@mixin box-shadow($shadow...) {
+  -webkit-box-shadow: $shadow;
+     -moz-box-shadow: $shadow;
+          box-shadow: $shadow;
+}
+
+@mixin border-radius($radius...) {
+  -webkit-border-radius: $radius;
+     -moz-border-radius: $radius;
+          border-radius: $radius;
+}
+
+@mixin border-top-left-radius($radius...) {
+  -webkit-border-top-left-radius: $radius;
+     -moz-border-radius-topleft:  $radius;
+          border-top-left-radius: $radius;
+}
+
+@mixin border-top-right-radius($radius...) {
+  -webkit-border-top-right-radius: $radius;
+     -moz-border-radius-topright:  $radius;
+          border-top-right-radius: $radius;
+}
+
+@mixin transition($transition...) {
+  -webkit-transition: $transition;
+     -moz-transition: $transition;
+       -o-transition: $transition;
+          transition: $transition;
+}
+
+@mixin user-select($select...) {
+  -webkit-user-select: $select;    /* Chrome all / Safari all */
+     -moz-user-select: $select;    /* Firefox all */
+      -ms-user-select: $select;    /* IE 10+ */
+       -o-user-select: $select;
+          user-select: $select;
+}