FIX: updates variables for HTML to use `em` instead of `px` in font-size (#9883)

FIX: updates variables for HTML to use em instead of px in font-size (#9883)

diff --git a/app/assets/stylesheets/common/foundation/variables.scss b/app/assets/stylesheets/common/foundation/variables.scss
index 22da7ac..961a7f1 100644
--- a/app/assets/stylesheets/common/foundation/variables.scss
+++ b/app/assets/stylesheets/common/foundation/variables.scss
@@ -35,10 +35,10 @@ $bronze: #cd7f32 !default;
 // Fonts
 // --------------------------------------------------
 
-$base-font-size-smaller: 14px !default;
-$base-font-size: 15px !default;
-$base-font-size-larger: 17px !default;
-$base-font-size-largest: 19px !default;
+$base-font-size-smaller: 0.875em !default; // eq. to 14px
+$base-font-size: 0.938em !default; // eq. to 15px
+$base-font-size-larger: 1.063em !default; // eq. to 17px
+$base-font-size-largest: 1.118em !default; // eq. to 19px
 $base-font-family: Helvetica, Arial, sans-serif !default;
 
 // Font-size defintions, multiplier ^ (step / interval)

GitHub sha: 5f61deff

This commit appears in #9883 which was approved by awesomerobot. It was merged by jordanvidrine.