Move site files to under-construction directory

Relocate index.html and style.css to an under-construction subfolder to better organize the project structure. Update HTML to reference CSS with new relative path. This prepares for future site development while keeping current under-construction version intact.

under-construction/style.css

@@ -0,0 +1,59 @@
+body {
+    margin: 0;
+    padding: 0;
+    font-family: 'Poppins', sans-serif;
+    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
+    color: white;
+    height: 100vh;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    text-align: center;
+}
+
+.container {
+    padding: 2rem;
+    max-width: 800px;
+}
+
+h1 {
+    font-size: 3rem;
+    font-weight: 600;
+    margin-bottom: 1rem;
+    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
+}
+
+p {
+    font-size: 1.2rem;
+    margin-bottom: 2rem;
+    opacity: 0.9;
+}
+
+.progress-bar {
+    width: 100%;
+    height: 8px;
+    background: rgba(255,255,255,0.2);
+    border-radius: 4px;
+    margin: 2rem 0;
+    overflow: hidden;
+}
+
+.progress {
+    width: 65%;
+    height: 100%;
+    background: white;
+    border-radius: 4px;
+    animation: progress 2s ease-in-out infinite;
+}
+
+.contact {
+    font-size: 1rem;
+    margin-top: 3rem;
+    opacity: 0.7;
+}
+
+@keyframes progress {
+    0% { width: 65%; }
+    50% { width: 75%; }
+    100% { width: 65%; }
+}