fix: a11y (gold-deep token AA, Disciplinas ul/li, Cierre nav) + scaffold cleanup

- Add gold-deep #7A5F15 token (~5.97:1 on white, WCAG AA) for small-text eyebrows
- Apply text-gold-deep to 4 eyebrows (Hero, Disciplinas, ComoEmpezar, Estratega)
- Disciplinas: div grid → semantic ul/li for screen-reader consistency
- Cierre: wrap contact links in <nav aria-label="Contacto">
- Estratega: portrait gradient → Tailwind tokens (from-ink to-gold), drop inline hex
- Delete unused Geist fonts (app/fonts/, ~134KB)
- Replace default README with creeer README
- Tests: +2 structural (Disciplinas ul/li, Cierre nav aria-label)

components/sections/Disciplinas.tsx

@@ -10,20 +10,20 @@ export function Disciplinas() {
     <section className="bg-base">
       <Container className="py-24 md:py-32">
         <motion.p variants={fadeInUp} initial="hidden" whileInView="visible" viewport={viewportOnce} {...motionProps(reduced)}
-          className="text-xs tracking-[0.3em] uppercase font-semibold text-gold">{disciplinas.eyebrow}</motion.p>
+          className="text-xs tracking-[0.3em] uppercase font-semibold text-gold-deep">{disciplinas.eyebrow}</motion.p>
         <motion.h2 variants={fadeInUp} initial="hidden" whileInView="visible" viewport={viewportOnce} {...motionProps(reduced)}
           className="mt-4 font-serif italic font-bold text-3xl md:text-5xl text-ink">{disciplinas.title}</motion.h2>
         <motion.p variants={fadeInUp} initial="hidden" whileInView="visible" viewport={viewportOnce} {...motionProps(reduced)}
           className="mt-4 text-muted text-lg">{disciplinas.lead}</motion.p>
-        <motion.div variants={staggerContainer} initial="hidden" whileInView="visible" viewport={viewportOnce} {...motionProps(reduced)}
-          className="mt-12 grid gap-8 md:grid-cols-3">
+        <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.div 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">
               <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.div>
+            </motion.li>
           ))}
-        </motion.div>
+        </motion.ul>
       </Container>
     </section>
   );