Convert the contact form to vanilla JS.

assets/sass/_zen.scss

@@ -258,17 +258,18 @@ figure {
 // Form
 
 .content {
+  label:has(+ :required) {
+    &::after {
+      content: '*';
+      color: var(--color-mark-highlight);
+    }
+  }
+
   input,
   textarea {
     @include margin-bottom(.75);
     width: 92%;
 
-    &:required + span::after {
-      content: ' *';
-      color: var(--color-mark-highlight);
-      vertical-align: top;
-    }
-
     &:not(:placeholder-shown):valid {
       background-color: var(--color-status-bg);
     }

assets/sass/mobile.scss

@@ -78,7 +78,7 @@
     display: inline-block;
     fill: var(--color-text);
     width: 1.6rem;
-    margin-left: 0.1rem;
+    margin-left: .1rem;
 
     rect {
       transform-origin: center;