/* ==========================================================================
   7DNA Analytica v2 — Responsive Rules
   ========================================================================== */

/* ---------- 1200px ---------- */
@media (max-width: 1200px) {
  .container { padding: 0 24px; }
  .hero-inner { gap: 48px; }
  .footer-inner { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
  .cta-band { padding: 48px; }
}

/* ---------- 1024px ---------- */
@media (max-width: 1024px) {
  h1 { font-size: clamp(2.2rem, 4vw, 3rem); }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; max-width: 480px; margin: 0 auto; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .insight-feature { grid-template-columns: 1fr; gap: 28px; padding: 40px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .footer-brand { grid-column: 1 / -1; }
  .stats-inner { flex-wrap: wrap; }
  .stat-item { flex: 0 0 50%; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
  .stat-item:nth-child(2n) { border-right: none; }
  .stat-item:nth-last-child(-n+2) { border-bottom: none; }
}

/* ---------- 900px / nav breakpoint ---------- */
@media (max-width: 900px) {
  .main-nav {
    position: fixed;
    inset: 72px 0 0 0;
    background: var(--bg);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 40px;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 280ms cubic-bezier(.4,0,.2,1);
    z-index: 800;
    border-top: 1px solid var(--border);
  }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav > ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-link {
    padding: 13px 8px;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    font-size: 1rem;
  }
  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    display: none;
    padding: 4px 0 8px 16px;
    background: transparent;
  }
  .nav-item.is-open .dropdown { display: block; }
  .caret { margin-left: auto; }
  .nav-cta { margin-top: 18px; }
  .nav-cta .btn-outline { display: none; }
  .hamburger { display: flex; }
}

/* ---------- 768px / mobile ---------- */
@media (max-width: 768px) {
  :root { --container: 100%; }
  .section { padding: 64px 0; }
  .section--tight { padding: 48px 0; }
  .hero { padding: 72px 0 56px; }
  .page-hero { padding: 56px 0 48px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 36px 28px; }
  .form-grid { grid-template-columns: 1fr; }
  .workflow { flex-direction: column; }
  .workflow-arrow { transform: rotate(90deg); margin: 6px 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
  .hero-inner { gap: 32px; }
  .data-table { display: block; overflow-x: auto; white-space: nowrap; }
  .stats-inner { flex-wrap: wrap; }
  .stat-item { flex: 0 0 50%; }
  .pub-item { gap: 12px; }
  .pub-num { display: none; }
  .form-shell { padding: 28px 20px; }
  .discipline-card { flex-direction: column; gap: 12px; }
}

/* ---------- 480px / small mobile ---------- */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.15rem; }
  .btn { padding: 12px 22px; }
  .btn-row { flex-direction: column; width: 100%; }
  .btn-row .btn { width: 100%; justify-content: center; }
  .card, .product-card, .insight-card { padding: 22px 20px; }
  .cta-band { padding: 28px 20px; }
  .stat-item { flex: 0 0 100%; border-right: none; }
  .insight-feature { padding: 28px 20px; }
  .footer-inner { gap: 24px; }
  .hero-badge { font-size: 0.65rem; padding: 5px 12px; }
}

/* ---------- 360px ---------- */
@media (max-width: 360px) {
  .logo-tagline { display: none; }
  .logo-name { font-size: 0.95rem; }
  .nav-cta .btn-sm { padding: 8px 14px; font-size: 0.8rem; }
}