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/Estratega.tsx

@@ -13,13 +13,12 @@ export function Estratega() {
           className="grid gap-12 md:grid-cols-[auto_1fr] md:items-center">
           {/* Portrait — placeholder gradient until dueña provides a photo */}
           <motion.div variants={fadeInUp}
-            className="w-40 h-40 md:w-56 md:h-56 rounded-full flex-shrink-0"
-            style={{ background: 'linear-gradient(135deg, #0A1F44 0%, #B8901f 100%)' }}
+            className="w-40 h-40 md:w-56 md:h-56 rounded-full flex-shrink-0 bg-gradient-to-br from-ink to-gold"
             aria-label="Retrato de la estratega"
             role="img"
           />
           <div>
-            <motion.p variants={fadeInUp} className="text-xs tracking-[0.3em] uppercase font-semibold text-gold">{estratega.eyebrow}</motion.p>
+            <motion.p variants={fadeInUp} className="text-xs tracking-[0.3em] uppercase font-semibold text-gold-deep">{estratega.eyebrow}</motion.p>
             <motion.h2 variants={fadeInUp} className="mt-4 font-serif italic font-bold text-3xl md:text-5xl text-ink">{estratega.title}</motion.h2>
             <motion.p variants={fadeInUp} className="mt-6 text-lg text-muted leading-relaxed max-w-2xl">{estratega.bio}</motion.p>
             <motion.blockquote variants={fadeInUp} className="mt-6 font-serif italic text-xl md:text-2xl text-ink border-l-4 border-gold pl-4">