Improved styles

src/utils/mixins/border-radius.scss

@@ -1,4 +0,0 @@
-@mixin border-radius($radius) {
-  border-radius: $radius;
-  -webkit-border-radius: $radius;
-}

src/utils/mixins/box-shadow.scss

@@ -1,4 +0,0 @@
-@mixin box-shadow($shadow) {
-  -webkit-box-shadow: $shadow;
-  box-shadow: $shadow;
-}

src/utils/mixins/fit-with-margin.scss

@@ -0,0 +1,8 @@
+@mixin fit-with-margin($margin) {
+  $offset: $margin * 2;
+
+  width: calc(100% - #{$offset});
+  max-width: calc(100% - #{$offset});
+  height: calc(100% - #{$offset});
+  margin: $margin;
+}