/* ═══════════════════════════════════════════
   RESPONSIVE.CSS — Mobile & tablet breakpoints
   Import this in every HTML page after all other CSS
═══════════════════════════════════════════ */

/* ── DESKTOP: hide mobile-only elements ── */
.nav-mobile-menu { display: none; }
.nav-menu-btn    { display: none; }

/* ── GALLERY: prevent resize blowout ── */
.gallery { width: 100%; min-width: 0; }
.gallery-main { width: 100%; min-width: 0; overflow: hidden; }
.gallery-main img { width: 100%; height: 100%; max-width: 100%; max-height: 100%; object-fit: contain; }

/* ── TABLET: 768px – 1024px ── */
@media (max-width: 1024px) {
  :root {
    --page-px: 32px;
  }

  /* Nav */
  .nav-logo-text { display: none; }

  /* Hero */
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 52px var(--page-px) 60px;
    gap: 40px;
  }
  .hero-visual { order: -1; }
  .hero-product-showcase { max-width: 340px; margin: 0 auto; }
  .hero-title { font-size: 2.2rem; }

  /* Categories */
  .cat-grid { grid-template-columns: repeat(2, 1fr); }

  /* Features */
  .features-inner { grid-template-columns: repeat(2, 1fr); gap: 32px; }

  /* Products grid */
  .prod-grid { grid-template-columns: repeat(3, 1fr); }

  /* Detail */
  .detail-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .gallery { position: static; width: 100%; }

  /* About */
  .about-hero {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .about-logo-wrap { display: none; }
  .about-values { grid-template-columns: repeat(2, 1fr); }

  /* Contact */
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* ── MOBILE: up to 767px ── */
@media (max-width: 767px) {
  :root {
    --page-px: 20px;
  }

  /* ── NAV ── */
  nav {
    padding: 0 var(--page-px);
    height: 56px;
    position: sticky;
  }
  .nav-logo-text { display: none; }
  .nav-links {
    display: none; /* hidden — hamburger menu below */
  }
  .nav-right { gap: 6px; }
  .lang-toggle { padding: 5px 8px; font-size: 0.62rem; }
  .theme-btn { width: 30px; height: 30px; }

  /* Mobile nav menu toggle */
  .nav-menu-btn {
    width: 34px; height: 34px;
    border-radius: 7px;
    border: 1px solid var(--border-mid);
    background: var(--surface);
    color: var(--text-2);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: all var(--t);
  }
  .nav-menu-btn svg { width: 16px; height: 16px; }

  /* Mobile nav dropdown */
  .nav-mobile-menu {
    display: none;
    position: fixed;
    top: 56px; left: 0; right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: 12px var(--page-px) 16px;
    flex-direction: column;
    gap: 4px;
    z-index: 199;
  }
  .nav-mobile-menu.open { display: flex; }
  .nav-mobile-menu .nav-link {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.88rem;
    border-radius: 8px;
  }

  /* ── PAGE WRAP ── */
  .page-wrap {
    padding: 32px var(--page-px) 60px;
  }

  /* ── HERO ── */
  .hero {
    grid-template-columns: 1fr;
    padding: 36px var(--page-px) 48px;
    gap: 32px;
    min-height: auto;
  }
  .hero-visual { order: -1; }
  .hero-product-showcase {
    max-width: 260px;
    margin: 0 auto;
  }
  .hero-badge { display: none; }
  .hero-title { font-size: 1.9rem; }
  .hero-body { font-size: 0.88rem; }
  .hero-ctas { flex-direction: column; gap: 10px; }
  .hero-ctas .btn-primary,
  .hero-ctas .btn-secondary { width: 100%; justify-content: center; }
  .hero-stats { gap: 20px; }
  .stat-num { font-size: 1.3rem; }

  /* ── CATEGORIES ── */
  .cats-section { padding-bottom: 48px; }
  .cats-header { flex-direction: column; align-items: flex-start; gap: 12px; }
  .cat-grid { grid-template-columns: 1fr; gap: 12px; }
  .cat-card { padding: 22px 20px; }

  /* ── FEATURES ── */
  .features-inner {
    grid-template-columns: 1fr;
    padding: 36px var(--page-px);
    gap: 28px;
  }

  /* ── PRODUCTS PAGE ── */ 
  .products-title { font-size: 1.4rem; }
  .tabs { overflow-x: auto; gap: 0; }
  .tab-btn { padding: 10px 16px 12px; font-size: 0.62rem; white-space: nowrap; }
  .prod-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .prod-img { max-height: 180px; } 

  /* ── prod-img #default was 130px, changed to 180px to prevent excessive zooming on mobile ── */

  /* ── PRODUCT DETAIL ── */
  .detail-back { margin-bottom: 24px; }
  .detail-grid { gap: 24px; }
  .gallery-main { padding: 20px; }
  .gallery-thumb { width: calc(25% - 6px); }
  .detail-name { font-size: 1.5rem; }
  .spec-grid { grid-template-columns: 1fr; }
  .power-table { font-size: 0.7rem; display: block; overflow-x: auto; }

  /* ── ABOUT ── */
  .about-hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-bottom: 40px;
    margin-bottom: 40px;
  }
  .about-logo-wrap { display: none; }
  .about-title { font-size: 1.75rem; }
  .about-values { grid-template-columns: 1fr; gap: 12px; }

  /* ── CONTACT ── */
  .contact-layout { grid-template-columns: 1fr; gap: 32px; }
  .contact-title { font-size: 1.5rem; }
  .contact-form { padding: 24px 20px; }
  .form-row { grid-template-columns: 1fr; gap: 14px; }

  /* ── FOOTER ── */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    padding: 36px var(--page-px) 24px;
  }
  .footer-inner > div:first-child {
    grid-column: 1 / -1;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
    padding: 16px var(--page-px) 20px;
  }
}

/* ── SMALL MOBILE: up to 400px ── */
@media (max-width: 400px) {
  .prod-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 1.65rem; }
}