feat: hover micro-interactions on cards, steps and CTA arrow

Disciplinas cards and Mecanismo/ComoEmpezar steps get a subtle lift +
border intensify on hover; the CTA arrow slides right. All gated with
motion-reduce so prefers-reduced-motion users see no movement.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

components/sections/Disciplinas.tsx

@@ -18,7 +18,8 @@ export function Disciplinas() {
         <motion.ul variants={staggerContainer} initial="hidden" whileInView="visible" viewport={viewportOnce} {...motionProps(reduced)}
           className="mt-12 grid gap-8 md:grid-cols-3 list-none p-0">
           {disciplinas.items.map((item) => (
-            <motion.li key={item.name} variants={fadeInUp} className="border-t-2 border-gold pt-5">
+            <motion.li key={item.name} variants={fadeInUp}
+              className="border-t-2 border-gold pt-5 transition-all duration-300 ease-out hover:-translate-y-1.5 hover:border-gold-deep motion-reduce:transform-none motion-reduce:transition-none">
               <h3 className="font-serif italic font-bold text-2xl text-ink">{item.name}</h3>
               <p className="mt-3 text-muted leading-relaxed">{item.desc}</p>
             </motion.li>