Add parallax and reveal effects + performances on transitions

src/style/tools/_mixins.scss

@@ -28,19 +28,19 @@
 // Center vertically
 @mixin center-y {
     top: 50%;
-    transform: translate3d(0,-50%,0);
+    transform: translate(0, -50%);
 }
 
 // Center horizontally
 @mixin center-x {
     left: 50%;
-    transform: translate3d(-50%,0,0);
+    transform: translate(-50%, 0);
 }
 
 // Center vertically and horizontally
 @mixin center-xy {
     top: 50%; left: 50%;
-    transform: translate3d(-50%,-50%,0);
+    transform: translate(-50%, -50%);
 }
 
 // Smooth fonts