@media (max-width: 1024px) {
  .card-grid,
  .calc-grid,
  .step-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid,
  .about-grid,
  .contact-split {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: var(--header-h);
    background: var(--color-deep-green);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.25rem;
    gap: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    gap: 0.75rem;
  }

  .hero {
    padding: 4rem 0 3rem;
  }

  .hero-art,
  .growth-shape {
    opacity: 0.35;
  }

  .card-grid,
  .calc-grid,
  .step-row,
  .product-grid,
  .footer-grid,
  .about-grid,
  .contact-split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 360px) {
  .header-inner,
  .container {
    width: min(100% - 1.2rem, var(--max-width));
  }

  .btn {
    width: 100%;
  }
}