fix mobile screen issue

src/components/optimization/OptimizationSection.tsx

@@ -1011,7 +1011,9 @@ const styles = `
 
   .dm-opt-mobile {
     position: relative;
-    margin: 0 10px;
+    /* Top gap separates this card from the hero stats bar above; sides stay 10px
+       and bottom stays flush so the Performance card butts against it below. */
+    margin: 16px 10px 0;
     padding: 24px 13px 22px;
     display: flex;
     flex-direction: column;