Add a smooth, animated dot cursor that follows the mouse

Adds a custom cursor with smooth animation using JavaScript and CSS, updates card backgrounds to #0a0a0a, and increases navigation bar button margins.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 75bceff7-98f2-4f6e-ae8e-e735399a1fe8
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 20f129c4-266a-489a-9b78-af922ec1dcda
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/d0a1d46d-d203-4308-bc6a-312ac7c0243b/75bceff7-98f2-4f6e-ae8e-e735399a1fe8/mApn6AR

static/css/styles.css

@@ -32,6 +32,34 @@ body {
     line-height: 1.6;
     overflow-x: hidden;
     position: relative;
+    cursor: none;
+}
+
+.dot-cursor {
+    position: fixed;
+    width: 8px;
+    height: 8px;
+    background: #3b82f6;
+    border-radius: 50%;
+    pointer-events: none;
+    z-index: 999999;
+    transition: transform 0.15s ease, background 0.2s ease;
+    will-change: transform;
+}
+
+.dot-cursor.hover {
+    transform: scale(1.5);
+    background: #60a5fa;
+}
+
+@media (max-width: 768px) {
+    body {
+        cursor: auto;
+    }
+    
+    .dot-cursor {
+        display: none;
+    }
 }
 
 body::after {
@@ -87,7 +115,7 @@ body::after {
 
 .navbar-links {
     display: flex;
-    gap: 40px;
+    gap: 56px;
     align-items: center;
     justify-content: center;
     flex: 1;
@@ -856,7 +884,7 @@ hr {
 
 .card,
 .card-sponsors {
-    background: var(--gray-900);
+    background: #0a0a0a;
     border-radius: 20px;
     overflow: hidden;
     border: 1px solid var(--gray-700);