Added animate.css & changed sass libraries import

resources/sass/app.scss

@@ -1,18 +1,7 @@
-// 1. Your custom variables and variable overwrites.
-// $global-link-color: #DA7D02;
+@import "./uikit";
 
-// 2. Import default variables and available mixins.
-@import "~uikit/src/scss/variables-theme.scss";
-@import "~uikit/src/scss/mixins-theme.scss";
-
-// 3. Your custom mixin overwrites.
-// @mixin hook-card() { color: #000; }
-
-// 4. Import UIkit.
-@import "~uikit/src/scss/uikit-theme.scss";
-
-// uikit overrides, mainly fixes of colors due to dark theme
-@import "uikitOverrides";
+// TODO import only the used animations
+@import "./animate-css";
 
 @import "./components/toggle";
 
@@ -25,3 +14,7 @@ $footer-height: 80px;
 footer {
     line-height: $footer-height;
 }
+
+.flex-grow {
+    flex-grow: 1;
+}