@media (max-width: 980px) {
  .primary-nav,
  .nav-actions .language-switch,
  .nav-actions .button-primary {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .primary-nav.is-open {
    align-items: stretch;
    background: var(--color-dark-5);
    border-top: 1px solid rgba(13, 13, 13, 0.08);
    display: grid;
    gap: var(--space-2);
    left: 0;
    margin: 0;
    padding: var(--space-5);
    position: fixed;
    right: 0;
    top: var(--header-height);
    z-index: 99;
  }

  .primary-nav.is-open a {
    border-radius: var(--radius-button);
    min-height: 2.75rem;
    padding: var(--space-3);
  }

  .primary-nav.is-open .mobile-only {
    display: inline-flex;
  }

  .problem-grid,
  .workflow-header,
  .tab-panel,
  .founder-grid,
  .contact-grid,
  .footer-grid,
  .pilot-cta-inner {
    grid-template-columns: 1fr;
  }

  .founder-photo-wrap {
    max-width: 22rem;
  }

  .workflow-header {
    align-items: start;
  }

  .workflow-tabs {
    overflow-x: auto;
    width: 100%;
  }

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

@media (min-width: 981px) {
  .mobile-only {
    display: none;
  }
}

@media (max-width: 720px) {
  :root {
    --header-height: 3.5rem;
  }

  .hero {
    padding-top: var(--space-16);
  }

  .hero h1 {
    font-size: 2.7rem;
  }

  .hero-copy {
    font-size: 1rem;
  }

  .hero-visual-wrap {
    margin-top: var(--space-10);
  }

  .hero-visual {
    min-width: 640px;
    width: 640px;
  }

  .problem,
  .workflow-section,
  .features,
  .founder-section,
  .contact-section {
    padding-block: var(--space-16);
  }

  .problem-title,
  .founder-copy h2,
  .contact-intro h2,
  .pilot-cta h2 {
    font-size: 2.25rem;
  }

  .problem-copy p {
    font-size: 1.1rem;
  }

  .workflow-shell {
    border-radius: 0;
    margin-inline: calc(var(--space-5) * -1);
  }

  .workflow-header,
  .tab-panel {
    padding: var(--space-5);
  }

  .workflow-content h3 {
    font-size: 2rem;
  }

  .workflow-visual {
    min-height: 18rem;
  }

  .feature-card img {
    height: 12rem;
  }

  .footer-links,
  .footer-bottom {
    grid-template-columns: 1fr;
  }

  .footer-links {
    display: grid;
  }

  .footer-bottom {
    align-items: start;
    display: grid;
  }
}

@media (max-width: 420px) {
  .hero h1 {
    font-size: 2.35rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .audience-row {
    align-items: stretch;
    justify-content: flex-start;
  }

  .audience-list {
    justify-content: flex-start;
  }
}