/* ==========================================================================
   STEINHAUS ARCHITECTURAL PRODUCTS
   Responsive Stylesheet
   Breakpoints: 1200px (laptop), 992px (tablet landscape),
                768px (tablet portrait), 560px (mobile)
   ========================================================================== */

/* ==========================================================================
   Laptop / small desktop (<=1200px)
   ========================================================================== */
@media (max-width: 1200px) {
  :root {
    --container-padding: 20px;
  }

  .advantage-list,
  .collections-grid {
    gap: 1.4rem;
  }

  .collections-explore-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   Tablet landscape (<=992px)
   ========================================================================== */
@media (max-width: 992px) {
  .main-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .about-preview,
  .advantage-layout,
  .monograph-section,
  .perspective-section,
  .compromise-section,
  .contact-layout,
  .monograph-cta {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .compromise-section {
    padding: 2.2rem;
  }

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

  .pillars-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
  }

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

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

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

  .icon-feature-grid .icon-feature {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: 1.4rem 0;
  }

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

  .detail-gallery {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 200px;
  }

  .detail-gallery .gallery-item:nth-child(1) {
    grid-column: span 2;
    grid-row: span 1;
  }

  .catalog-download-banner {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 2.6rem;
  }

  .catalog-cover-mock {
    justify-self: center;
    margin-top: 1.5rem;
  }

  .catalog-download-banner .banner-actions {
    justify-content: center;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .collection-intro,
  .product-detail-intro,
  .product-panel {
    grid-template-columns: 1fr;
    gap: 2.2rem;
  }

  .product-detail-intro .image-frame {
    order: 1;
  }

  .product-detail-intro-copy {
    order: 1;
  }

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

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

  .product-gallery-stack {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: none;
  }

  .spec-block {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .numbered-feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }

}

/* ==========================================================================
   Tablet portrait (<=768px)
   ========================================================================== */
@media (max-width: 768px) {
  .section {
    padding: 4.5rem 0;
  }

  .section-sm {
    padding: 3rem 0;
  }

  .hero,
  .hero-small {
    min-height: 88vh;
  }

  .page-hero {
    min-height: 52vh;
    padding-bottom: 3rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

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

  .advantage-list {
    grid-template-columns: 1fr 1fr;
  }

  .icon-feature-grid {
    grid-template-columns: 1fr;
  }

  .compromise-features {
    grid-template-columns: 1fr 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .contact-form-card {
    padding: 2rem 1.6rem;
  }

  .map-callout {
    left: 5%;
    right: 5%;
    max-width: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    text-align: left;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-legal {
    justify-content: center;
  }

  .monograph-stack {
    height: 350px;
  }

  .catalog-viewer {
    padding: 1.4rem;
  }

  .viewer-toolbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .collections-explore-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .product-gallery-stack {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: none;
  }

  .icon-feature-grid.cols-5 {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem 0;
  }

  .icon-feature-grid.cols-5 .icon-feature {
    border-right: none;
  }

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

/* ==========================================================================
   Mobile (<=560px)
   ========================================================================== */
@media (max-width: 560px) {
  :root {
    --container-padding: 18px;
    --header-height: 78px;
    --header-height-scrolled: 68px;
  }

  h1 {
    font-size: clamp(2rem, 8vw, 2.6rem);
  }

  .logo-link {
    width: 150px;
    height: 36px;
  }

  .logo-img {
    height: 60px;
  }

  .collections-grid,
  .advantage-list,
  .compromise-features,
  .collections-explore-grid,
  .detail-gallery,
  .product-grid,
  .product-gallery-stack,
  .numbered-feature-grid {
    grid-template-columns: 1fr;
  }

  .detail-gallery .gallery-item:nth-child(1) {
    grid-column: span 1;
  }

  .detail-gallery {
    grid-auto-rows: 240px;
  }

  .about-preview-stats {
    gap: 1.6rem;
  }

  .image-quote-badge {
    position: static;
    margin-top: 1rem;
    max-width: none;
  }

  .catalog-download-banner {
    padding: 2rem 1.4rem;
  }

  .viewer-stage {
    gap: 0.6rem;
  }

  .viewer-nav-btn {
    width: 38px;
    height: 38px;
  }

  .book-click-zone {
    width: 20%;
  }  

  .cta-form {
    flex-direction: column;
  }

  .cta-form button {
    padding: 0.9rem;
  }

  .mobile-nav-list a {
    font-size: 1.6rem;
  }

  .back-to-top {
    right: 1.1rem;
    bottom: 1.1rem;
    width: 40px;
    height: 40px;
  }
}