/* ============================================================
   RESPONSIVE — Mobile-first breakpoints
   ============================================================ */

/* ── Mobile base (< 640px) ──────────────────────────────────── */
.header-nav { display: none; }
.header-tg  { display: none; }
.header-burger { display: flex; }

/* Bottom sheet modal on mobile */
.modal-overlay {
  align-items: flex-end;
  padding: 0;
}
.modal {
  border-radius: 20px 20px 0 0;
  max-width: 100%;
  max-height: 92svh;
  padding: 0 20px 40px;
  transform: translateY(100%);
}
.modal-overlay.active .modal {
  transform: translateY(0);
}
.rfq-modal::before {
  content: '';
  display: block;
  width: 36px;
  height: 4px;
  background: var(--border-strong);
  border-radius: 2px;
  margin: 14px auto 20px;
}
.rfq-modal .modal-close { top: 14px; right: 16px; }

/* Bottom nav: show on mobile */
.bottom-nav { display: block; }
/* Ensure page content isn't hidden under bottom nav */
body { padding-bottom: var(--bottom-nav-h); }

.products-grid          { grid-template-columns: repeat(2, 1fr); gap: 12px; }
.products-grid--3       { grid-template-columns: repeat(2, 1fr); }
.categories-grid        { grid-template-columns: repeat(2, 1fr); }
.categories-grid--3     { grid-template-columns: repeat(1, 1fr); }
.categories-grid--4     { grid-template-columns: repeat(2, 1fr); }
.blog-grid              { grid-template-columns: 1fr; }
.features-grid          { grid-template-columns: 1fr; gap: 12px; }
.why-nexrc-grid         { grid-template-columns: 1fr; gap: 12px; }
.footer-inner           { grid-template-columns: 1fr; gap: 32px; }
.promo-block            { grid-template-columns: 1fr; }
.product-layout         { grid-template-columns: 1fr; gap: 32px; }

/* 44px minimum touch targets */
.btn-md, .btn-lg { min-height: 44px; }
.filter-pill     { min-height: 44px; }

/* Import promo — stack on mobile */
.import-promo           { grid-template-columns: 1fr; gap: 40px; padding: 40px 32px; }
.import-promo__right    { display: none; }

/* Tg CTA — stack on mobile */
.tg-cta-inner { flex-direction: column; text-align: center; }
.tg-cta-card  { flex-direction: column; text-align: center; padding: 28px 24px; }

.hero { padding: 48px 0 60px; }
.hero-title { font-size: 32px; letter-spacing: -0.8px; }
.hero-subtitle { font-size: 16px; }
.hero-cta { flex-direction: column; align-items: flex-start; }
.hero-cta .btn { width: 100%; justify-content: center; }
.hero-trust { gap: 12px; }

.section-title    { font-size: 26px; }
.section-title--lg{ font-size: 30px; }
.section-header   { flex-direction: column; align-items: flex-start; }
:root { --section-py: 56px; }

.tg-cta-inner h2 { font-size: 24px; }
.promo-card { padding: 28px 24px; }

/* ── Small Tablet (≥ 480px) ──────────────────────────────────── */
@media (min-width: 480px) {
  /* Restore centered modal on tablet+ */
  .modal-overlay { align-items: center; padding: 24px; }
  .modal { border-radius: 16px; max-width: 480px; padding: 32px; transform: translateY(16px) scale(0.99); max-height: 92vh; }
  .modal-overlay.active .modal { transform: translateY(0) scale(1); }
  .rfq-modal::before { display: none; }
  .categories-grid    { grid-template-columns: repeat(3, 1fr); }
  .categories-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .categories-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .hero-cta .btn   { width: auto; }
  .hero-title { font-size: 38px; }
}

/* ── Tablet (≥ 768px) ────────────────────────────────────────── */
@media (min-width: 768px) {
  .products-grid    { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .products-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .categories-grid    { grid-template-columns: repeat(6, 1fr); }
  .categories-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .categories-grid--4 { grid-template-columns: repeat(4, 1fr); }
  .blog-grid        { grid-template-columns: repeat(2, 1fr); }
  .features-grid    { grid-template-columns: repeat(3, 1fr); }
  .footer-inner     { grid-template-columns: 1fr 1fr; }
  .promo-block      { grid-template-columns: 1fr 1fr; }

  .hero-title { font-size: 48px; }
  .hero-cta   { flex-direction: row; }
  :root { --section-py: 72px; }
  .section-title    { font-size: 30px; }
  .tg-cta-inner h2  { font-size: 30px; }
  .header-tg { display: flex; }
}

/* ── Tablet (768+) extra overrides ──────────────────────────── */
@media (min-width: 768px) {
  .import-promo__right   { display: flex; }
  .tg-cta-inner          { flex-direction: row; text-align: left; }
  .tg-cta-card           { flex-direction: row; text-align: left; }
}

/* ── Desktop (≥ 1024px) ──────────────────────────────────────── */
@media (min-width: 1024px) {
  .header-nav    { display: flex; }
  .header-burger { display: none; }
  .bottom-nav    { display: none; }
  body           { padding-bottom: 0; }

  .hero-inner {
    grid-template-columns: 1fr 420px;
    gap: 64px;
  }
  .hero-visual { display: flex; align-items: center; justify-content: flex-end; }

  .products-grid   { grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .blog-grid       { grid-template-columns: repeat(3, 1fr); }
  .features-grid   { grid-template-columns: repeat(3, 1fr); }
  .why-nexrc-grid  { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .footer-inner    { grid-template-columns: 1.6fr 1fr 1fr; }
  .product-layout  { grid-template-columns: 1fr 1fr; gap: 64px; }

  .hero-title       { font-size: 56px; }
  :root { --section-py: 80px; }
  .section-title    { font-size: 32px; }
  .section-title--lg{ font-size: 40px; }
  .tg-cta-inner h2  { font-size: 32px; }
}

/* ── Large Desktop (≥ 1280px) ────────────────────────────────── */
@media (min-width: 1280px) {
  .hero-title { font-size: 64px; letter-spacing: -2px; }
  :root { --section-py: 96px; }
}

/* ── Reduce motion ───────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}