Simplify playground action separator

site/decodal-site/src/pages/playground.astro

@@ -15,6 +15,7 @@ import ManualLayout from '../layouts/ManualLayout.astro';
           </label>
           <button id="load-example" type="button">Load</button>
         </div>
+        <span class="action-separator" aria-hidden="true">|</span>
         <div class="action-group run-actions">
           <button id="format" disabled>Format</button>
           <label class="entry-picker">

site/decodal-site/src/style.css

@@ -299,16 +299,13 @@ main.playground {
 
 .action-group {
   align-items: center;
-  background: rgba(15, 23, 42, 0.55);
-  border: 1px solid var(--border);
-  border-radius: 12px;
   display: flex;
   gap: 8px;
-  padding: 6px;
 }
 
-.run-actions {
-  border-color: rgba(96, 165, 250, 0.35);
+.action-separator {
+  color: var(--border);
+  font-weight: 700;
 }
 
 .example-picker,