@media (max-width: 900px) {
  .site-header {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 12px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    grid-column: 1 / -1;
    width: 100%;
    justify-content: flex-start;
    border-top: 1px solid var(--line);
    padding-top: 10px;
  }

  .nav.is-open {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .nav.is-open a {
    border: 1px solid var(--line);
    background: var(--surface-strong);
    padding: 10px 12px;
  }

  .hero,
  .workspace-grid,
  .workspace-grid.wide,
  .about-band {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .section-heading,
  .feature-block ul,
  .feature-points,
  .contact-grid,
  .contact-info-list,
  .footer {
    grid-template-columns: 1fr;
  }

  .tool-grid,
  .benefit-grid,
  .testimonial-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .section {
    width: min(100% - 24px, 1160px);
    padding: 38px 0;
  }

  .nav a {
    padding: 7px 8px;
    font-size: 0.86rem;
  }

  .nav.is-open {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .tool-grid,
  .benefit-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel div {
    min-height: 112px;
  }

  .inline-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .inline-controls .button,
  .inline-controls label {
    width: 100%;
  }

  .json-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .json-controls .json-indent-control {
    grid-template-columns: 1fr;
    grid-column: 1 / -1;
  }
}

@media (max-width: 420px) {
  .json-controls {
    grid-template-columns: 1fr;
  }
}