@media (max-width: 980px) {
  .header-inner {
    display: flex;
    justify-content: space-between;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    background: rgba(12, 13, 15, 0.97);
    display: none;
    padding: 1rem 1.25rem 1.3rem;
  }

  .site-header.is-open .nav {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    gap: 0.9rem;
  }

  .menu-toggle {
    display: grid;
    place-items: center;
  }

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

  .hero-grid,
  .project,
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 4.4rem 0;
  }

  .form,
  .form-actions {
    grid-template-columns: 1fr;
  }

  .hero-actions,
  .project-links {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}