adjust font sizes, add transition and cursor states

style/helpers.scss

@@ -19,3 +19,14 @@
 @function pow($base, $exponent) {
   @return exponent($base, $exponent);
 }
+
+// Transition mixins
+@mixin transition($args...) {
+  -webkit-transition: $args;
+  -moz-transition: $args;
+}
+
+@mixin transition-property($args...) {
+  -webkit-transition-property: $args;
+  -moz-transition-property: $args;
+}