Optimise CSS (#17)

* Installs Sass

* installs concurrently

* Ports CSS to SCSS

* Gitignores CSS build output

* Moves public/main.css to scss/index.scss

* Fixes port to SCSS

* Use-ifies base styles

* Use-ifies layout styles

* Use-ifies modules styles

* Use-ifies variables

* Use-ifies utils

* Moves normalize to scss

* Implements a CSS minifying step with CSSO

---------

Co-authored-by: Joe Carstairs <jcarstairs@scottlogic.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/scss/variables/spacing.scss b/scss/variables/spacing.scss
new file mode 100644
index 0000000..a4d1d91
--- /dev/null
+++ b/scss/variables/spacing.scss
@@ -0,0 +1,47 @@
+:root {
+  --margin-inline-md: calc(2 * var(--relative-eighth-rem));
+  --margin-block-lg: calc(16 * var(--relative-eighth-rem));
+  --margin-block-md: calc(10 * var(--relative-eighth-rem));
+  --margin-block-sm: calc(5 * var(--relative-eighth-rem));
+
+  --padding-inline-lg: calc(4 * var(--relative-eighth-rem));
+  --padding-inline-md: calc(2 * var(--relative-eighth-rem));
+  --padding-inline-sm: calc(1 * var(--relative-eighth-rem));
+  --padding-block-lg: calc(12 * var(--relative-eighth-rem));
+  --padding-block-md: calc(8 * var(--relative-eighth-rem));
+  --padding-block-sm: calc(5 * var(--relative-eighth-rem));
+
+  --grid-padding: calc(var(--grid-padding-relative-eighth-rem) * var(--relative-eighth-rem));
+  --grid-column-width: calc(var(--grid-column-width-relative-eighth-rem) * var(--relative-eighth-rem));
+  --grid-gutter-width: calc(var(--grid-gutter-width-relative-eighth-rem) * var(--relative-eighth-rem));
+  
+  --grid-total-relative-eighth-rem-width: calc(
+    var(--grid-padding-relative-eighth-rem) * 2 +
+    var(--grid-column-width-relative-eighth-rem) * var(--grid-column-count) + 
+    var(--grid-gutter-width-relative-eighth-rem) * (var(--grid-column-count) - 1)
+  );
+  --relative-eighth-rem: calc(
+    var(--grid-total-width) / var(--grid-total-relative-eighth-rem-width)
+  );
+  --width-prose: calc(
+    var(--grid-column-width) * var(--grid-prose-column-count) +
+    var(--grid-gutter-width) * (var(--grid-prose-column-count) - 1)
+  );
+
+  --grid-column-width-relative-eighth-rem: 32;
+  --grid-gutter-width-relative-eighth-rem: 4;
+
+  /***********************************************************
+   * Generally, we will use columns to keep things laid out  *
+   * nicely. However, on screens narrower than xs, this gets *
+   * pretty much impossible. So for those screens, we use a  *
+   * single-column layout taking up 100vw. In effect, this   *
+   * is just default CSS layout plus a wee bit padding. From *
+   * xs widewards, we use multiple columns on a fixed width. *
+   ***********************************************************/
+
+  --grid-total-width: 100vw;
+  --grid-padding-relative-eighth-rem: 8;
+  --grid-column-count: 1;
+  --grid-prose-column-count: 1;
+}