/* ═══════════════════════════════════════
   HELLENGINEERS — RESPONSIVE
═══════════════════════════════════════ */
@media (max-width: 1024px) {
  .feed-grid, .discuss-grid { grid-template-columns: 1fr; }
  .feed-right, .discuss-right { display: none; }
}

@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }
  .sidebar { transform: translateX(-240px); width: 240px; }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,.3); }
  .main { margin-left: 0; }
  .hamburger { display: flex; }
  .nav-search { display: none; }
  .nav-brand span { display: none; }
  .people-grid { grid-template-columns: repeat(auto-fill, minmax(160px,1fr)); }
  .explore-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .cta-row { flex-direction: column; }
  footer { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .profile-name-row { flex-direction: column; align-items: flex-start; }
  .auth-card { padding: 28px 20px; }
  .settings-row { flex-wrap: wrap; gap: 10px; }
}

@media (max-width: 480px) {
  .hero h1 { letter-spacing: -.025em; }
  .hero-stats { flex-wrap: wrap; justify-content: space-around; }
  .feat-grid { grid-template-columns: 1fr; }
  .btn-lg { padding: 12px 24px; font-size: 15px; }
  .proj-scroll { padding-left: 16px; }
}