/* ============================================
   RESPONSIVE — Midnight Math
   ============================================ */

/* ── Tablet (1024px) ── */
@media (max-width: 1024px) {
  .container { padding: 0 var(--s-5); }
  .section { padding: var(--s-20) 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: var(--s-10); }
  .hero { min-height: 80vh; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .stepper { flex-wrap: wrap; gap: var(--s-4); }
  .step:not(:last-child)::after { display: none; }
  .page-header { padding: var(--s-16) 0 var(--s-12); }
}

/* ── Mobile Nav ── */
.mobile-nav {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(10, 10, 18, .95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: var(--s-2);
  opacity: 0; visibility: hidden;
  transition: opacity var(--t-base), visibility var(--t-base);
  padding-top: var(--navbar-h);
}
.mobile-nav.active { opacity: 1; visibility: visible; }
.mobile-nav a {
  padding: 14px 32px; font-size: 1.25rem; font-weight: 500;
  color: rgba(255,255,255,.85);
  font-family: var(--font-display);
  border-radius: var(--r-md);
  transition: all var(--t-fast);
  width: 84%; text-align: center;
  letter-spacing: -0.01em;
}
.mobile-nav a:hover, .mobile-nav a.active {
  background: var(--brand-gradient-soft);
  color: white;
}

/* ── Mobile (768px) ── */
@media (max-width: 768px) {
  html { font-size: 15px; }
  .section { padding: var(--s-16) 0; }
  .section-header { margin-bottom: var(--s-10); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--s-8); }
  .footer-bottom { flex-direction: column; gap: var(--s-2); text-align: center; }
  .hero { min-height: 70vh; padding: var(--s-12) 0; }
  .hero h1 { font-size: clamp(2rem, 8vw, 3.25rem); }
  .hero-content p { font-size: 1.0625rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .stat-card { padding: var(--s-4); text-align: center; }
  .page-header { padding: var(--s-12) 0 var(--s-8); }
  .carousel-track .card { min-width: 280px; }
  .map-container { height: 320px; }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .modal { width: 95%; padding: var(--s-6); }
  th, td { padding: 12px; font-size: 0.875rem; }
  .filter-group { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; -webkit-overflow-scrolling: touch; }
  .filter-btn { white-space: nowrap; flex-shrink: 0; }
  .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; }
  .timeline { padding-left: var(--s-8); }
  .timeline::before { left: 10px; }
  .timeline-item::before { left: -29px; width: 10px; height: 10px; }
  .lightbox-prev, .lightbox-next { display: none; }
  .contact-grid-2 { grid-template-columns: 1fr; }
  .navbar { height: 64px; }
  :root { --navbar-h: 64px; }
}

/* ── Small Mobile (480px) ── */
@media (max-width: 480px) {
  .container { padding: 0 var(--s-4); }
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.125rem; }
  .btn { padding: 12px 22px; font-size: 0.9375rem; }
  .btn-lg { padding: 14px 28px; font-size: 1rem; }
  .card { padding: var(--s-5); }
  .gallery-grid { grid-template-columns: 1fr 1fr; gap: var(--s-2); }
  .hero-eyebrow { font-size: 0.6875rem; padding: 6px 12px; }
}

/* ── Large Desktop (1400px+) ── */
@media (min-width: 1400px) {
  :root { --container-w: 1320px; --container-max: 1320px; }
}

/* ── Ultra-wide (1920px+) ── */
@media (min-width: 1920px) {
  html { font-size: 17px; }
}