@media (max-width: 980px) {
  .hero,
  .split-section,
  .split-section.reverse,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 8rem;
  }

  .hero-card {
    max-width: 620px;
  }

  .trust-strip,
  .service-grid,
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .navbar {
    border-radius: 28px;
    align-items: center;
  }

  .nav-toggle {
    display: block;
    order: 3;
  }

  .theme-toggle {
    order: 2;
    margin-left: auto;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 0.75rem);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: var(--panel-solid);
    box-shadow: var(--shadow);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu a {
    display: block;
    padding: 0.7rem 0.8rem;
  }

  .hero h1 {
    font-size: clamp(2.6rem, 14vw, 4.6rem);
  }

  .hero-meta,
  .trust-strip,
  .demo-grid,
  .service-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .portrait-placeholder {
    min-height: 340px;
  }

  .section {
    padding: 4.5rem 0;
  }

  .resume-section {
    flex-direction: column;
    align-items: flex-start;
  }

  .spec-list div {
    display: grid;
  }

  .spec-list span {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .brand-mark {
    font-size: 0.78rem;
  }

  .brand-submark {
    font-size: 0.58rem;
  }

  .hero-actions .button {
    width: 100%;
  }

  .section h2,
  .resume-section h2 {
    font-size: 2.2rem;
  }
}