Update index.html: increase registration button width for better aesthetics.

Author: junchaoIU

index.html

@@ -160,7 +160,8 @@
         align-items: center;
         justify-content: center;
         text-decoration: none;
-        padding: 12px 16px;
+        padding: 12px 40px;
+        min-width: 140px;
         border-radius: 999px;
         background: rgba(255, 255, 255, 0.95);
         color: #0b5fff;