@media (max-width: 1080px) {
  .grid-4,
  .tech-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 880px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    background: var(--color-surface);
    border-top: 1px solid var(--color-line);
    box-shadow: var(--shadow-soft);
    display: none;
    gap: 0;
    grid-template-columns: 1fr;
    left: 0;
    padding: var(--space-4) var(--space-6);
    position: absolute;
    right: 0;
    top: 100%;
  }

  .nav-links.is-open {
    display: grid;
  }

  .nav-links a {
    border-bottom: 1px solid var(--color-line);
    padding: var(--space-4) 0;
  }

  .nav-actions .btn {
    display: none;
  }

  .grid-2,
  .grid-3,
  .footer-grid,
  .flow-line {
    grid-template-columns: 1fr;
  }

  .footer-bottom,
  .between {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .section-tight {
    padding: var(--space-12) 0;
  }

  .brand {
    min-width: auto;
  }

  .brand img {
    height: 40px;
    width: 40px;
  }

  .brand-name span {
    display: none;
  }

  .hero {
    padding-top: var(--space-10);
  }

  .hero-actions,
  .hero-actions .btn,
  .cluster .btn {
    width: 100%;
  }

  .metric-row,
  .grid-4,
  .tech-grid {
    grid-template-columns: 1fr;
  }

  .cta-band,
  .architecture-map {
    padding: var(--space-6);
  }

  .logo-card {
    min-height: 240px;
    padding: var(--space-5);
  }
}