feat: public site landing page with header, footer, styles

- Header with fixed navbar, responsive mobile menu, services dropdown
- Landing page with hero, services grid, value propositions, testimonials, contact
- Comprehensive CSS (1300+ lines): navy/gold brand colors, custom properties,
  responsive breakpoints, card hover effects, form styles, print & a11y
- Footer with 3-column layout, contact info, social links
- JS: hamburger toggle, smooth scroll, navbar scroll effect, scroll animations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

includes/footer.php

@@ -0,0 +1,67 @@
+</main>
+
+<!-- Footer -->
+<footer class="footer">
+    <div class="container">
+        <div class="footer__grid">
+            <!-- About Column -->
+            <div class="footer__col">
+                <h3 class="footer__heading">
+                    <i class="fa-solid fa-scale-balanced"></i> Gestoría LP
+                </h3>
+                <p class="footer__text">
+                    Somos una gestoría profesional especializada en trámites migratorios.
+                    Te acompañamos en cada paso de tu proceso para que obtengas tus documentos
+                    de manera segura, rápida y sin complicaciones.
+                </p>
+            </div>
+
+            <!-- Contact Column -->
+            <div class="footer__col">
+                <h3 class="footer__heading">Contacto</h3>
+                <ul class="footer__contact-list">
+                    <li>
+                        <i class="fa-solid fa-phone"></i>
+                        <a href="tel:+521XXXXXXXXXX">(+52) 1 XXX XXX XXXX</a>
+                    </li>
+                    <li>
+                        <i class="fa-solid fa-envelope"></i>
+                        <a href="mailto:contacto@gestorialp.com">contacto@gestorialp.com</a>
+                    </li>
+                    <li>
+                        <i class="fa-solid fa-location-dot"></i>
+                        <span>La Paz, Baja California Sur, México</span>
+                    </li>
+                    <li>
+                        <i class="fa-brands fa-whatsapp"></i>
+                        <a href="https://wa.me/521XXXXXXXXXX" target="_blank" rel="noopener">WhatsApp</a>
+                    </li>
+                </ul>
+            </div>
+
+            <!-- Social & Links Column -->
+            <div class="footer__col">
+                <h3 class="footer__heading">Síguenos</h3>
+                <div class="footer__social">
+                    <a href="https://facebook.com/" target="_blank" rel="noopener" class="footer__social-link" aria-label="Facebook">
+                        <i class="fa-brands fa-facebook-f"></i>
+                    </a>
+                </div>
+                <h3 class="footer__heading footer__heading--mt">Horario</h3>
+                <p class="footer__text">
+                    Lunes a Viernes: 9:00 AM — 6:00 PM<br>
+                    Sábado: 9:00 AM — 2:00 PM
+                </p>
+            </div>
+        </div>
+
+        <div class="footer__bottom">
+            <p>&copy; 2026 Gestoría LP. Todos los derechos reservados.</p>
+        </div>
+    </div>
+</footer>
+
+<!-- Main JS -->
+<script src="assets/js/main.js"></script>
+</body>
+</html>