@media (max-width: 1100px) {
  .hero-grid,
  .dashboard-grid {
    grid-template-columns: 1fr;
  }

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

  .dashboard-preview {
    transform: none;
  }
}

@media (max-width: 768px) {
  .app {
    grid-template-columns: 1fr;
  }

  .sidebar {
    height: auto;
    position: relative;
  }

  .stats-grid,
  .preview-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 24px;
  }

  .nav {
    gap: 20px;
  }

  .main {
    padding: 18px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
}