/* =========================================================
   Responsive overrides
   ========================================================= */

/* ── Laptop / tablet: 1024px ──────────────────────────────── */
@media (max-width: 1024px) {
  .pipeline-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── Nav collapse + card grids: 900px ─────────────────────── */
@media (max-width: 900px) {
  .site-header { padding: 14px 20px; }

  .nav { flex: none; margin-left: auto; }
  .nav__toggle { display: flex; }
  .nav__cta { display: none; }

  .nav__menu {
    position: fixed;
    top: 66px;
    left: 0;
    right: 0;
    background: var(--nero-black-2);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 16px;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.25s ease, opacity 0.2s ease;
  }
  .nav.is-open .nav__menu {
    max-height: calc(100svh - 66px);
    overflow-y: auto;
    opacity: 1;
    padding-block: 12px;
  }

  .nav__group { width: 100%; }
  .nav__group-label {
    width: 100%;
    justify-content: space-between;
    padding: 16px 8px;
    border-bottom: 1px solid var(--border-faint);
    font-size: 0.875rem;
  }
  .nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    border: none;
    background: none;
    padding: 4px 0 12px 8px;
    display: none;
  }
  .nav__group.is-open .nav__dropdown { display: flex; }
  .nav__group.is-open .nav__caret { transform: rotate(180deg); }
  .nav__item { padding: 10px 6px; }

  .nav__cta--mobile { display: flex; justify-content: center; margin: 16px 0 4px; }

  .hw-grid { grid-template-columns: 1fr; }
  .model-grid { grid-template-columns: 1fr; }
}

/* ── Tablet portrait: 768px ───────────────────────────────── */
@media (max-width: 768px) {
  .stat-grid { grid-template-columns: 1fr; }
  .pipeline-grid { grid-template-columns: repeat(2, 1fr); }
  .hero__hud { display: none; }
}

/* ── Mobile: 560px ─────────────────────────────────────────── */
@media (max-width: 560px) {
  .container { padding-inline: 1.25rem; }
  .hero__content { padding-inline: 20px; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { text-align: center; }
  .flow { flex-wrap: wrap; row-gap: 0.5rem; }
  .pipeline-flow { row-gap: 0.75rem; }
  .pipeline-flow__arrow { margin: 0 10px; }
  .site-footer__inner { flex-direction: column; align-items: flex-start; }
}

/* ── Motion preferences ────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .nav__dropdown, .nav__menu { transition: none; }
}