Started on a GUI redesign of Snake.

resources/css/forSize.mixin.scss

@@ -0,0 +1,44 @@
+$smallScreen: 640px;
+$wideScreen: 1200px;
+$ultraWideScreen: 1600px;
+
+/** ### forSize
+  * This mixin allows us to apply some rules selectively based on the screen
+  * size. There are three primary sizes: `small`, `medium`, and `large`, which
+  * are mutually exclusive. Additionally there are two additional sizes:
+  * `notSmall` and `ultraLarge`. `notSmall`, as the name implies matches any
+  * value which is not the small screen size, so it overlaps with medium,
+  * large, and ultraLarge. `ultraLarge` defines a wider minimum screen size
+  * than large, but neither large nor ultraLarge specify maximum widths,
+  * so ultraLarge is a strict subset of large. A screen large enough to match
+  * ultraLarge will also match large (compare with medium and large: matching
+  * medium means it will not match large, and vice versa). */
+@mixin forSize($size) {
+
+    @if $size == small {
+        @media screen and (max-width: $smallScreen) { @content; } }
+    @else if $size == notSmall {
+        @media screen and (min-width: $smallScreen + 1) { @content; } }
+    @else if $size == medium {
+        @media screen and (min-width: $smallScreen + 1) and (max-width: $wideScreen - 1) { @content; } }
+    @else if $size == large {
+        @media screen and (min-width: $wideScreen) { @content; } }
+    @else if $size == ultraLarge {
+        @media screen and (min-width: $ultraWideScreen) { @content; } }
+}
+
+
+@mixin forAspect($aspect) {
+
+    @if $aspect == tall {
+        @media screen and (max-aspect-ratio: 1/2) { @content; } }
+    @else if $aspect == portrait {
+        @media screen and (min-aspect-ratio: 11/20) and (max-aspect-ratio: 5/6) { @content; } }
+    @else if $aspect == even {
+        @media screen and (min-aspect-ratio: 11/12) and (max-aspect-ratio: 6/5) { @content; } }
+    @else if $aspect == landscape {
+        @media screen and (min-aspect-ratio: 12/11) and (max-aspect-ratio: 31/18) { @content; } }
+    @else if $aspect == wide {
+        @media screen and (min-aspect-ratio: 16/9) { @content; } }
+
+}