@media (max-width: 1080px) {
  .hero-grid,
  .profile-layout,
  .search-layout,
  .feature-split,
  .contact-grid,
  .admin-layout,
  .footer-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .three-column {
    grid-template-columns: repeat(2, 1fr);
  }

  .filter-panel,
  .sticky-card {
    position: static;
  }
}

@media (max-width: 820px) {
  .brand {
    align-items: flex-start;
  }

  .brand-mark {
    width: 44px;
    height: 44px;
  }

  .brand-title {
    font-size: 0.95rem;
  }

  .brand-tagline {
    font-size: 0.66rem;
    letter-spacing: 0.1em;
  }

  .site-nav {
    position: absolute;
    top: 78px;
    left: 1rem;
    right: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: white;
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
  }

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

  .nav-toggle {
    display: block;
  }

  .hero-stats,
  .two-column,
  .three-column,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .section,
  .hero-section,
  .page-hero {
    padding: 4rem 0;
  }
}

@media (max-width: 560px) {
  .navbar {
    min-height: 74px;
  }

  .brand {
    gap: 0.65rem;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .brand-title {
    font-size: 0.88rem;
  }

  .brand-tagline {
    display: none;
  }

  .container {
    width: min(100% - 1.25rem, var(--container));
  }

  .hero-copy h1,
  .page-hero h1 {
    font-size: 2rem;
  }

  .tutor-top,
  .profile-header,
  .lead-card-header,
  .button-row,
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn,
  .btn-sm {
    width: 100%;
  }
}