/* ==========================================================================
   KaifMart Product Page — Responsive Stylesheet
   Device Frame Breakpoints: 1280px, 1024px, 768px, 430px, 390px, 375px
   ========================================================================== */

/* --------------------------------------------------------------------------
   Laptop / Small Desktop (1280px and below)
   -------------------------------------------------------------------------- */
@media (max-width: 1280px) {
  :root {
    --container-max-width: 1140px;
  }

  .product-grid {
    grid-template-columns: 520px 1fr;
    gap: 36px;
  }

  .gallery-main-display {
    height: 540px;
  }

  .features-card-grid {
    gap: 20px;
  }

  .coffee-cards-grid {
    gap: 20px;
  }

  .related-products-grid {
    gap: 20px;
  }
}

/* --------------------------------------------------------------------------
   Tablet Landscape (1024px and below)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: 460px 1fr;
    gap: 32px;
  }

  .gallery-main-display {
    height: 480px;
  }

  .product-title {
    font-size: 28px;
  }

  .section-main-title {
    font-size: 32px;
  }

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

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

  .specs-two-columns-grid {
    grid-template-columns: 1fr;
  }

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

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

  .footer-main-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

/* --------------------------------------------------------------------------
   Tablet Portrait (768px and below)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .top-announcement-bar {
    height: auto;
    padding: 8px 0;
  }

  .announcement-content {
    flex-direction: column;
    gap: 4px;
    text-align: center;
    font-size: 12px;
  }

  .site-header {
    height: auto;
    padding: 16px 0;
  }

  .header-container {
    flex-wrap: wrap;
    gap: 16px;
  }

  .search-bar-wrapper {
    order: 3;
    max-width: 100%;
    width: 100%;
  }

  .category-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 16px;
  }

  .nav-links {
    gap: 20px;
    white-space: nowrap;
  }

  .nav-contact-cta {
    display: none;
  }

  /* Product Hero Stacking */
  .product-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .product-gallery {
    flex-direction: column-reverse;
  }

  .gallery-thumbnails {
    flex-direction: row;
    overflow-x: auto;
    gap: 12px;
    padding-bottom: 4px;
  }

  .thumb-btn {
    width: 70px;
    height: 70px;
    flex-shrink: 0;
  }

  .gallery-main-display {
    width: 100%;
    height: 420px;
  }

  /* Trust Badges */
  .trust-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  /* Dark Promo Banner */
  .dark-promo-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
  }

  .btn-promo-cta {
    width: 100%;
    text-align: center;
  }

  /* Video Demo Card */
  .video-showcase-card {
    height: 320px;
  }

  /* Steps Grid */
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .footer-bottom-bar {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* --------------------------------------------------------------------------
   Mobile Devices (430px, 390px, 375px)
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  :root {
    --container-padding: 16px;
  }

  .brand-logo img {
    width: 130px;
  }

  .product-title {
    font-size: 24px;
  }

  .product-model {
    font-size: 16px;
  }

  .current-price {
    font-size: 30px;
  }

  .section-main-title {
    font-size: 26px;
  }

  .gallery-main-display {
    height: 340px;
    border-radius: var(--radius-lg);
  }

  /* Action Buttons */
  .purchase-actions-row-1 {
    flex-direction: column;
  }

  .quantity-controller {
    width: 100%;
  }

  .purchase-actions-row-2 {
    flex-direction: column;
  }

  /* Feature cards & coffee cards */
  .features-card-grid {
    grid-template-columns: 1fr;
  }

  .coffee-cards-grid {
    grid-template-columns: 1fr;
  }

  .trust-container {
    grid-template-columns: 1fr;
  }

  .box-items-grid {
    grid-template-columns: 1fr;
  }

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

  .video-showcase-card {
    height: 240px;
    border-radius: var(--radius-lg);
  }

  .video-play-btn {
    width: 54px;
    height: 54px;
  }

  .video-badge-pill {
    bottom: 14px;
    left: 14px;
    font-size: 11px;
    padding: 6px 12px;
  }

  .spec-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .spec-val {
    text-align: left;
  }

  .specs-table-body {
    padding: 16px;
  }

  .box-items-body {
    padding: 16px;
  }

  .payment-badges-row {
    flex-wrap: wrap;
    justify-content: center;
  }
}