Fix StyleLint

Author: Joossensei

assets/scss/init/_mixins.scss

@@ -19,7 +19,7 @@
   border-color: var(--#{$color});
   // hover
   &.hover,
-  &:hover  {
+  &:hover {
     background-color: var(--#{$color}-600);
     border-color: var(--#{$color}-600);
   }

assets/scss/init/_variables.scss

@@ -11,7 +11,7 @@ $bolt-saturated: #003e7c; // Very saturated. Use with care
 $big-z-index: 1000;
 
 // Typography
-$font-family-base:            system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
+$font-family-base:            system-ui, -apple-system, blinkmacsystemfont, "Segoe UI", roboto, helvetica, arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
 $headings-font-family:        'Source Sans Variable', sans-serif;
 
 $font-size-base:              0.9rem;