/* ==========================================================================
   SLG (StarLink Goods Pvt Ltd.) — Responsive Stylesheet
   Mobile-First Breakpoints (320px, 480px, 640px, 768px, 1024px, 1280px)
   ========================================================================== */

/* ---------------- Extra Small Mobile (< 480px) ---------------- */
@media (max-width: 479px) {
  :root {
    --header-height: 64px;
    --announcement-height: auto;
  }

  .announcement-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .announcement-quick-links {
    display: none;
  }

  .site-logo .logo-brand {
    font-size: 1.15rem;
  }

  .site-logo .logo-icon {
    width: 32px;
    height: 32px;
  }

  .header-search {
    display: none; /* Accessible via search button or drawer on small screens */
  }

  .section {
    padding-top: 2.25rem;
    padding-bottom: 2.25rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .product-card-actions {
    grid-template-columns: 1fr;
  }

  .otp-digit-box {
    width: 40px;
    height: 48px;
    font-size: 1.25rem;
  }

  .conflict-products-compare {
    grid-template-columns: 1fr;
  }

  .admin-stats-grid {
    grid-template-columns: 1fr;
  }

  .corporate-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
}

/* ---------------- Small Mobile to Large Mobile (480px - 767px) ---------------- */
@media (max-width: 767px) {
  .header-nav {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
  }

  .hero-content {
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .catalogue-layout {
    grid-template-columns: 1fr !important;
  }

  .catalogue-sidebar {
    display: none; /* Opens as off-canvas drawer on mobile */
  }

  .catalogue-sidebar.mobile-open {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 85%;
    max-width: 320px;
    height: 100%;
    background: #FFFFFF;
    z-index: 2100;
    overflow-y: auto;
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
  }

  .mobile-filter-toggle {
    display: inline-flex !important;
  }

  .product-detail-grid {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
  }

  .checkout-grid {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }

  .order-summary-sidebar {
    order: -1; /* Show order summary at top of checkout on mobile */
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .corporate-grid {
    grid-template-columns: 1fr;
  }

  .admin-stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------------- Tablet & Small Desktop (768px - 1023px) ---------------- */
@media (min-width: 768px) and (max-width: 1023px) {
  .header-nav {
    gap: 1rem;
  }

  .nav-link {
    font-size: 0.875rem;
  }

  .footer-top {
    grid-template-columns: 2fr repeat(2, 1fr);
  }

  .catalogue-layout {
    grid-template-columns: 240px 1fr;
  }

  .product-detail-grid {
    grid-template-columns: 1fr 1fr;
  }

  .checkout-grid {
    grid-template-columns: 1.4fr 1fr;
  }

  .admin-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------------- Desktop (1024px+) ---------------- */
@media (min-width: 1024px) {
  .mobile-filter-toggle {
    display: none !important;
  }

  .catalogue-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
  }

  .product-detail-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 3.5rem;
  }

  .checkout-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 2.5rem;
    align-items: flex-start;
  }

  .sticky-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
  }

  .hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: center;
  }
}

/* ---------------- High DPI & Touch Friendly Rules ---------------- */
@media (hover: none) and (pointer: coarse) {
  .btn, .header-action-btn, .nav-link, .checkbox-label {
    min-height: 48px; /* Touch target minimum */
  }

  .card-hover:hover {
    transform: none;
  }
}