add classes visible-mac and visible-pc to enable platform agnostic styling

resources/css/app.css

@@ -190,3 +190,17 @@ @layer base {
         @apply bg-background text-foreground;
     }
 }
+
+@layer components {
+    .is-mac .visible-pc {
+        display: none !important;
+    }
+
+    .visible-mac {
+        display: none !important;
+    }
+
+    .is-mac .visible-mac {
+        display: inherit !important;
+    }
+}