change font-size and margin to maintain hierarchy

Signed-off-by: PARTHIV PRATIM SAIKIA <parthivsaikia985@gmail.com>

Author: parthivsaikia

site/src/pages/index.js

@@ -47,10 +47,10 @@ const InstructionsContainer = styled.div`
 `;
 
 const SectionLabel = styled.h3`
-  font-size: 1rem;
-  font-weight: 600;
+  font-size: 2rem;
+  font-weight: 500;
   color: ${({ theme }) => (theme.mode === "light" ? "#111" : "#fff")}; /* Matched header contrast */
-  margin: 0 0 8px 0;
+  margin: 0 0 12px 0;
   text-align: center;
 `;