/* ============================================================
   VOLUM TECHNOLOGIES — Responsive / Media Queries
   ============================================================ */

@media (max-width: 900px) {
  .nav-center { display: none; flex-direction: column; }
  .nav-center.open {
    display: flex; position: fixed;
    top: 68px; left: 0; right: 0;
    background: rgba(2,4,7,0.98);
    padding: 2rem; gap: 1.5rem;
    border-bottom: 1px solid rgba(0,152,253,0.1);
    z-index: 999;
  }
  .nav-right .nav-btn { display: none; }
  .hamburger { display: flex; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3),
  .stat-item:nth-child(4) { border-top: 1px solid rgba(0,152,253,0.08); }

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

  .about-inner { grid-template-columns: 1fr; gap: 3rem; }
  .about-visual { height: 240px; }

  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .form-row { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 860px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-card:nth-child(2n) { border-right: none; }
  .prod-card:nth-child(-n+3) { border-bottom: 1px solid rgba(0,152,253,0.08); }
}

@media (max-width: 560px) {
  .products-grid { grid-template-columns: 1fr; }
  .prod-card { border-right: none; border-bottom: 1px solid rgba(0,152,253,0.08); }
  .prod-card:last-child { border-bottom: none; }
  .map-container { aspect-ratio: unset; height: 240px; }
}

/* ── Policy sidebar responsive ── */
@media (max-width: 900px) {
  .policy-layout {
    flex-direction: column; gap: 0;
  }
  .policy-sidebar {
    position: static; flex: unset;
    max-height: none; overflow-y: visible;
    background: rgba(0,152,253,0.04);
    border: 1px solid rgba(0,152,253,0.1);
    border-left: 3px solid var(--primary);
    border-radius: 0 8px 8px 0;
    padding: 1.25rem 1.5rem;
    margin-bottom: 2.5rem;
  }
  .policy-toc-nav { flex-direction: row; flex-wrap: wrap; gap: 0.25rem 0.15rem; padding-left: 0; }
  .policy-toc-nav::before { display: none; }
  .toc-link { padding: 0.25rem 0.55rem; font-size: 0.75rem; }
  .toc-link::before { display: none; }
  .toc-link.active { color: var(--primary); }
}