@media (max-width: 900px) {
  .hero-grid,
  .two-columns,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-illustration {
    min-height: 280px;
  }

  .stats-grid,
  .materials-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .header-inner {
    position: relative;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: none;
    padding: var(--space-4);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-neutral-200);
    box-shadow: var(--shadow-md);
  }

  .main-nav.is-open {
    display: block;
  }

  .main-nav ul {
    display: grid;
    gap: 0;
  }

  .main-nav a {
    display: block;
    padding: 0.8rem;
  }

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

  .hero-illustration {
    display: none;
  }

  .footer-bottom {
    display: grid;
  }
}

@media (max-width: 520px) {
  .section {
    padding-block: var(--space-10);
  }

  .button-group,
  .button {
    width: 100%;
  }

  .material-card {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: var(--space-5);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}