Style: Change prompt box border to dark cyan

assets/styles.css

@@ -175,10 +175,10 @@
 /* ==================== Input Area (GPT-Style Prompt Box) ==================== */
 .input-container {
     background: white !important;
-    border: 1px solid #d1d5db !important;
+    border: 2px solid #008b8b !important;
     border-radius: 12px !important;
     padding: 15px !important;
-    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08) !important;
+    box-shadow: 0 2px 8px rgba(0, 139, 139, 0.15) !important;
 }
 
 .prompt-input textarea {