/* ==========================================================================
   MOBILE-FIRST RESPONSIVE DESIGN SYSTEM — CRESCENT CRAFTS
   ========================================================================== */

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background-color: rgba(12, 12, 11, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 95;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(90px + env(safe-area-inset-top, 0px)) max(20px, 5vw) calc(30px + env(safe-area-inset-bottom, 0px));
  transform: translateY(-100%);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.5s;
  visibility: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu.active {
  transform: translateY(0);
  visibility: visible;
}

body.menu-open {
  overflow: hidden !important;
  touch-action: none;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 3vh, 26px);
  margin-top: 10px;
  margin-bottom: auto;
}

.mobile-nav-link {
  font-family: var(--font-serif);
  font-size: clamp(24px, 6vw, 36px);
  color: var(--text-secondary);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s ease, transform 0.4s ease, color 0.2s ease;
  display: inline-block;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--text-primary);
}

.mobile-menu.active .mobile-nav-link {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered transition delays */
.mobile-menu.active .mobile-nav-link:nth-child(1) { transition-delay: 0.08s; }
.mobile-menu.active .mobile-nav-link:nth-child(2) { transition-delay: 0.12s; }
.mobile-menu.active .mobile-nav-link:nth-child(3) { transition-delay: 0.16s; }
.mobile-menu.active .mobile-nav-link:nth-child(4) { transition-delay: 0.20s; }
.mobile-menu.active .mobile-nav-link:nth-child(5) { transition-delay: 0.24s; }
.mobile-menu.active .mobile-nav-link:nth-child(6) { transition-delay: 0.28s; }
.mobile-menu.active .mobile-nav-link:nth-child(7) { transition-delay: 0.32s; }

.mobile-menu-footer {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease 0.36s, transform 0.4s ease 0.36s;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-menu.active .mobile-menu-footer {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu-footer .btn {
  width: 100%;
}

/* Global Overflow Protection */
main, section, header, footer {
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
}

/* ==========================================================================
   MOBILE SCREEN OPTIMIZATIONS (< 768px)
   ========================================================================== */
@media (max-width: 767px) {
  
  /* Hero Section */
  .hero-section {
    height: auto !important;
    min-height: 100svh !important;
    min-height: 100vh;
    padding-top: calc(90px + env(safe-area-inset-top, 0px)) !important;
    padding-bottom: calc(40px + env(safe-area-inset-bottom, 0px)) !important;
    display: flex !important;
    align-items: center !important;
  }
  
  .hero-content {
    width: 100% !important;
    max-width: 100% !important;
    padding: 0 !important;
  }
  
  .hero-title {
    margin-bottom: 1.25rem !important;
  }
  
  .hero-subtitle {
    max-width: 100% !important;
    margin-bottom: 24px !important;
    font-size: 15px !important;
    line-height: 1.55 !important;
  }
  
  .hero-actions,
  .hero-content .flex {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    gap: 12px !important;
  }
  
  .hero-actions .btn,
  .hero-content .flex .btn {
    width: 100% !important;
    justify-content: center !important;
    padding: 14px 20px !important;
  }
  
  /* Page Hero on Subpages */
  .page-hero {
    padding-top: calc(100px + env(safe-area-inset-top, 0px)) !important;
    padding-bottom: 2rem !important;
  }
  
  /* Grids & Cards */
  .asymmetric-grid {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }
  
  .asymmetric-grid .category-card {
    min-height: 260px !important;
    height: 280px !important;
  }
  
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)) !important;
    gap: 20px 14px !important;
  }
  
  .product-card .img-wrap {
    border-radius: var(--radius-sm) !important;
    margin-bottom: 8px !important;
  }
  
  .product-card h3 {
    font-size: 16px !important;
    line-height: 1.3 !important;
  }
  
  .product-card p {
    font-size: 13px !important;
  }
  
  /* Material Story & Editorial Grids */
  .material-story,
  .story-section,
  .story-section.reverse,
  .editorial-grid,
  .contact-grid,
  .b2b-grid,
  .detail-grid {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 28px !important;
  }
  
  .material-story > div:last-child,
  .story-content {
    padding: 0 !important;
  }
  
  .info-list li {
    flex-direction: column !important;
    gap: 4px !important;
    padding: 10px 0 !important;
  }
  
  .process-item {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
    padding: 1.5rem 0 !important;
  }
  
  /* Feature Statement */
  .feature-statement {
    padding: 40px 0 !important;
    overflow: hidden !important;
    width: 100% !important;
    max-width: 100vw !important;
  }
  
  .feature-statement h2 {
    font-size: clamp(36px, 9vw, 64px) !important;
    white-space: normal !important;
    line-height: 1.1 !important;
    text-align: center !important;
  }
  
  /* Horizontal Image Marquee (Fix 200vw blowout) */
  .horizontal-scroll {
    width: 100% !important;
    max-width: 100vw !important;
    overflow: hidden !important;
    padding: var(--space-md) 0 !important;
  }
  
  .horizontal-scroll .horizontal-wrap {
    width: max-content !important;
    display: flex !important;
    gap: 12px !important;
    animation: marquee-scroll 25s linear infinite !important;
    will-change: transform;
  }
  
  .horizontal-scroll .horizontal-wrap img {
    width: 220px !important;
    height: 160px !important;
    flex-shrink: 0 !important;
  }
  
  /* Detail Page */
  .gallery-main {
    aspect-ratio: 4/5 !important;
    max-height: 380px !important;
  }
  
  .gallery-thumb {
    width: 64px !important;
    height: 64px !important;
  }
  
  .spec-item {
    grid-template-columns: 120px 1fr !important;
    font-size: 13px !important;
    padding: 10px 0 !important;
  }
  
  /* Form Inputs (Prevent iOS auto-zoom on focus) */
  .form-control,
  input,
  select,
  textarea {
    font-size: 16px !important;
  }
  
  /* Footer */
  .footer {
    padding: 3rem 0 calc(20px + env(safe-area-inset-bottom, 0px)) !important;
  }
  
  .footer-grid {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
    margin-bottom: 2rem !important;
  }
  
  .footer-bottom {
    flex-direction: column !important;
    gap: 8px !important;
    align-items: flex-start !important;
    padding-top: 1rem !important;
  }
  
  /* Enquiry Drawer Full Width on Mobile */
  .enquiry-drawer {
    max-width: 100% !important;
    width: 100% !important;
  }
  
  /* Lightbox */
  .lightbox-content {
    max-width: 96vw !important;
    max-height: 80vh !important;
  }
  
  .lightbox-nav {
    width: 36px !important;
    height: 36px !important;
  }
  
  .lightbox-prev { left: 4px !important; }
  .lightbox-next { right: 4px !important; }
}

/* Continuous Marquee Animation */
@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Tablet Optimizations (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)) !important;
    gap: var(--space-md) !important;
  }
  
  .asymmetric-grid {
    grid-template-columns: 1fr 1fr !important;
  }
  
  .material-story,
  .story-section,
  .contact-grid,
  .detail-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: var(--space-lg) !important;
  }
}