Style adjustments for forms.

assets/sass/_zen.scss

@@ -11,7 +11,7 @@ body {
 }
 
 .footer {
-  border-top: 2px solid var(--color-brand);
+  border-top: 2px solid var(--color-border);
 }
 
 // Apply smaller text to blocks, footer etc.
@@ -202,11 +202,6 @@ figure {
 
 // Search
 
-.search-input {
-  // Add vertical rhythm margins.
-  @include margin-block(1);
-}
-
 .search-text {
   font-size: var(--fs-l);
   max-width: 80%;

assets/sass/base/forms/_forms.scss

@@ -18,6 +18,7 @@ select {
   @include margin-bottom(.75);
 }
 
+// Mark field as required if needed.
 label {
   &:has(+ :required) {
     &::after {
@@ -44,9 +45,17 @@ textarea {
   width: Min(30em, 100%);
 }
 
+// For forms with multibple fields show submit button below the form.
 input:not(:only-of-type),
 textarea {
   & + [type='submit'] {
     display: block;
   }
 }
+
+// For forms with single field add space between it and the submit button.
+input:only-of-type {
+  &:has(+ [type='submit']) {
+    margin-right: .5rem;
+  }
+}