/* RESPONSIVE */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
}
@media (max-width: 600px) {
  .section { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .mobile-bar { display: grid; }
  .float-whatsapp { bottom: 72px; }
  .hero-buttons { flex-direction: column; }
}