adjust margin for alphabet header and nav button for better spacing

Author: 1046prt

src/assets/styles/CardStack.css

@@ -70,6 +70,7 @@
   text-align: center;
   z-index: 100;
   margin: 2% 0;
+  margin-top: 30px;
 }
 
 .alphabet-title {
@@ -200,7 +201,7 @@
   border: none;
   width: 3.5rem;
   height: 3.5rem;
-  margin-top: 8%;
+  margin-top: 6%;
   border-radius: 50%;
   background: linear-gradient(135deg, rgba(129, 140, 248, 0.2), rgba(165, 180, 252, 0.1));
   color: #4f5ff0;