@media (max-width: 1199px) {
  .services-grid,
  .products-grid,
  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .advantages-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero h1 {
    font-size: 2.8rem;
  }

  .hero-features {
    gap: 24px;
  }

  .equipment-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 991px) {
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--color-primary);
    padding: 100px 30px 30px;
    transition: right var(--transition);
    z-index: 999;
    overflow-y: auto;
  }

  .main-nav.open {
    right: 0;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .main-nav a {
    display: block;
    padding: 12px 16px;
    font-size: 1rem;
  }

  .main-nav .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: rgba(255,255,255,.05);
    border-radius: var(--radius);
    min-width: auto;
    display: none;
    padding: 4px 0;
  }

  .main-nav .has-dropdown.open .dropdown {
    display: block;
  }

  .main-nav .dropdown a {
    color: rgba(255,255,255,.7);
    padding: 10px 16px 10px 32px;
  }

  .main-nav .dropdown a:hover {
    background: rgba(255,255,255,.05);
    color: var(--color-accent);
  }

  .burger {
    display: flex;
  }

  .header-contacts {
    display: none;
  }

  .about-grid,
  .contacts-grid,
  .service-detail-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .service-sidebar {
    position: static;
  }

  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 767px) {
  html {
    font-size: 15px;
  }

  .section {
    padding: 60px 0;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }

  .hero {
    min-height: 90vh;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .hero-features {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .hero-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    text-align: left;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
    text-align: center;
  }

  .services-grid,
  .products-grid,
  .catalog-grid {
    grid-template-columns: 1fr;
  }

  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .advantage-item {
    padding: 20px 12px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-header {
    padding: 120px 0 40px;
  }

  .page-header h1 {
    font-size: 2rem;
  }

  .main-nav {
    width: 100%;
    right: -100%;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 1.7rem;
  }
}

/* Mobile nav overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 998;
}

.nav-overlay.active {
  display: block;
}