@media (max-width: 1100px) {
  .grid-4,
  .product-grid,
  .document-grid,
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .production-layout,
  .innovation-hero,
  .contact-hero,
  .contact-layout,
  .split-section {
    grid-template-columns: 1fr;
  }

  .timeline-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .mobile-topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
  }

  .menu-toggle {
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: var(--radius-sm);
    background: var(--color-pink-100);
    color: var(--color-magenta);
  }

  .mobile-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-navy);
    font-weight: 900;
  }

  .mobile-brand .logo-placeholder {
    width: 46px;
    height: 36px;
    font-size: 0.8rem;
  }

  .mobile-brand .brand-logo {
    width: 46px;
    height: 36px;
  }

  .sidebar {
    inset: 0 0 0 auto;
    transform: translateX(105%);
    transition: transform 180ms ease;
    box-shadow: var(--shadow-soft);
  }

  body.nav-open .sidebar {
    transform: translateX(0);
  }

  .main {
    margin-left: 0;
  }

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

  .hero-media .placeholder {
    position: static;
    min-height: 280px;
    border-radius: var(--radius-lg);
    -webkit-mask-image: none;
    mask-image: none;
  }

  .hero-media .image-fill {
    position: static;
    height: auto;
    min-height: 280px;
    border-radius: var(--radius-lg);
    -webkit-mask-image: none;
    mask-image: none;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .home-features .feature-card:nth-child(2) {
    border-right: 0;
  }
}

@media (max-width: 620px) {
  .main {
    padding: var(--space-4);
  }

  .grid-4,
  .grid-3,
  .grid-2,
  .product-grid,
  .document-grid,
  .stats-grid,
  .form-grid,
  .timeline-grid {
    grid-template-columns: 1fr;
  }

  .home-features .feature-card {
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .home-features .feature-card:last-child {
    border-bottom: 0;
  }

  .cta-banner {
    grid-template-columns: 1fr;
  }

  .btn-row,
  .tabs {
    align-items: stretch;
    flex-direction: column;
  }

  .btn,
  .tab-btn {
    width: 100%;
  }

  .note-strip {
    align-items: flex-start;
  }
}