Update evaluation/eval_interfaces/reg_cot_eval_interface.html

evaluation/eval_interfaces/reg_cot_eval_interface.html

@@ -93,7 +93,7 @@ button:hover{opacity:.9}
 
     <!-- MAIN CONTROLS (now vertical on the right) -->
     <div class="controls" style="display:none">
-      
+      <button id="full_screen" style="visibility:hidden">Enter Full Screen</button>
       <p>Is the final answer correct or incorrect?</p>
       <button id="btn-correct">Correct</button>
       <button id="btn-wrong">Incorrect</button>
@@ -119,7 +119,42 @@ button:hover{opacity:.9}
 
 <!-- ──────────── SCRIPT ──────────── -->
 <script>
-  
+document.addEventListener("DOMContentLoaded", () => {
+    const btn = document.getElementById('full_screen');
+
+    function isFullscreen() {
+      return document.fullscreenElement || 
+             document.webkitFullscreenElement || 
+             document.mozFullScreenElement || 
+             document.msFullscreenElement;
+    }
+
+    // Show button only if NOT in fullscreen at start
+    if (!isFullscreen()) {
+         btn.style.visibility = 'visible';
+    }
+
+    btn.addEventListener('click', () => {
+        if (!isFullscreen()) {
+            document.documentElement.requestFullscreen?.() ||
+            document.documentElement.webkitRequestFullscreen?.() ||
+            document.documentElement.mozRequestFullScreen?.() ||
+            document.documentElement.msRequestFullscreen?.();
+        }
+    });
+
+    function toggleButton() {
+        if (isFullscreen()) {
+            btn.style.visibility = 'hidden'; // Hide in fullscreen
+        } else {
+            btn.style.visibility = 'visible'; // Show when not fullscreen
+        }
+    }
+    document.addEventListener('fullscreenchange', toggleButton);
+    document.addEventListener('webkitfullscreenchange', toggleButton);
+    document.addEventListener('mozfullscreenchange', toggleButton);
+    document.addEventListener('MSFullscreenChange', toggleButton);
+});
 /* utilities */
 const shuffle=a=>{for(let i=a.length-1;i>0;i--){const j=Math.floor(Math.random()*(i+1));[a[i],a[j]]=[a[j],a[i]];}return a;}
 const nowISO=()=>new Date().toISOString();