resolve installation issue on vercel sandbox + refine search feature with instruction capabilities

styles/main.css

@@ -216,6 +216,59 @@
       transform: translateX(-50%);
     }
   }
+
+  /* Loading state animations */
+  @keyframes fade-in-up {
+    from {
+      opacity: 0;
+      transform: translateY(20px);
+    }
+    to {
+      opacity: 1;
+      transform: translateY(0);
+    }
+  }
+
+  @keyframes pulse-subtle {
+    0%, 100% {
+      opacity: 1;
+    }
+    50% {
+      opacity: 0.95;
+    }
+  }
+
+  @keyframes text-shimmer {
+    0% {
+      background-position: -200% center;
+    }
+    100% {
+      background-position: 200% center;
+    }
+  }
+
+  .animate-fade-in-up {
+    animation: fade-in-up 0.6s ease-out forwards;
+    opacity: 0;
+  }
+
+  .animate-pulse-subtle {
+    animation: pulse-subtle 2s ease-in-out infinite;
+  }
+
+  .animate-text-shimmer {
+    background: linear-gradient(
+      90deg,
+      rgb(156 163 175) 0%,
+      rgb(229 231 235) 50%,
+      rgb(156 163 175) 100%
+    );
+    background-size: 200% auto;
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+    background-clip: text;
+    animation: text-shimmer 3s linear infinite;
+  }
 }
 
 .grecaptcha-badge { visibility: hidden; }