// Appearance
//
// The appearance property is used to display an element using a platform-native styling based on the users' operating system's theme.
//
// Values: auto | none
// Default: auto
//
// http://www.w3.org/TR/css3-ui/#appearance
@mixin appearance($value: auto) {
  -webkit-appearance: $value;
     -moz-appearance: $value;
          appearance: $value;
}