Update index.html

index.html

@@ -652,12 +652,15 @@
                         
                         // 거리에 따른 위협 레벨
                         if (distance < 2000) {
+                            threat.classList.add('level-high');
                             threat.classList.add('missile-lock');
-                            threat.textContent = '!';
+                            threat.textContent = '◆';
                         } else if (distance < 5000) {
+                            threat.classList.add('level-medium');
                             threat.textContent = '◆';
                         } else {
-                            threat.textContent = '▲';
+                            threat.classList.add('level-low');
+                            threat.textContent = '◆';
                         }
                         
                         threat.style.left = `${x}px`;