fix: center-align flow steps in how-it-works cards

Author: jimmdd

client/src/Landing.css

@@ -388,10 +388,11 @@
     display: flex;
     flex-direction: column;
     gap: 0.6rem;
+    align-items: center;
 }
 
 .flow-step {
-    display: flex;
+    display: inline-flex;
     align-items: center;
     gap: 0.7rem;
     font-size: 0.85rem;