Cross-browser transition support in SCSS plus the Google bezier curve for transitions.

transition-mixin.scss

@mixin transition($args...) {
  -webkit-transition: $args;
  -moz-transition: $args;
  -o-transition: $args;
  transition: $args;
}

.google-bezier {
  @include transition(all 0.5s cubic-bezier(0.4, 0.0, 0.2, 1));
}