UI: simplify reveal animations to prevent flickering and late triggers

components/blocks/CertificatesBlock.tsx

@@ -93,7 +93,7 @@ export function CertificatesBlock({ badge, title, description, certificates = de
   };
 
   const itemVariants = {
-    hidden: { opacity: 0, y: 40 },
+    hidden: { opacity: 0, y: 20 },
     show: { opacity: 1, y: 0, transition: { duration: 1.0, ease: [0.16, 1, 0.3, 1] } },
   };
 
@@ -140,7 +140,7 @@ export function CertificatesBlock({ badge, title, description, certificates = de
           variants={containerVariants}
           initial="hidden"
           whileInView="show"
-          viewport={{ once: true, amount: 0.1 }}
+          viewport={{ once: true, margin: "-50px" }}
         >
           {certificates.map((cert, index) => {
             const isIso = cert.type === 'iso';