/* ==============================================================================
   PAXELBOX CANOPY SHOWCASE - ULTRA-PREMIUM ARCHITECTURAL STYLESHEET
   Vanilla CSS with Modern Glassmorphism, Responsive Grid & Fluid Animations
   ============================================================================== */

:root {
  /* Brand Color Tokens */
  --paxel-purple-dark: #1E0B38;
  --paxel-purple: #2D125C;
  --paxel-purple-light: #5A27A8;
  --paxel-orange: #FF5E1E;
  --paxel-yellow: #FFAE00;
  
  /* Dark Mode Architectural Palette */
  --bg-primary: #0A0C10;
  --bg-secondary: #12151D;
  --bg-card: rgba(22, 26, 36, 0.85);
  --bg-card-hover: rgba(30, 35, 48, 0.95);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(255, 94, 30, 0.4);
  
  /* Text Tokens */
  --text-primary: #F3F4F6;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  --text-highlight: #FFAE00;
  
  /* Badges & Accents */
  --badge-freestanding: rgba(79, 70, 229, 0.2);
  --badge-freestanding-border: #6366F1;
  --badge-attached: rgba(16, 185, 129, 0.2);
  --badge-attached-border: #10B981;
  
  /* Spacings & Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --shadow-glow: 0 0 25px rgba(255, 94, 30, 0.25);
  
  /* Fonts */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Reset & Global */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(45, 18, 92, 0.35) 0%, transparent 40%),
    radial-gradient(circle at 90% 60%, rgba(255, 94, 30, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 50% 90%, rgba(30, 11, 56, 0.4) 0%, transparent 50%);
  background-attachment: fixed;
}

/* Container */
.container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography Utility */
h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

/* ==============================================================================
   NAVIGATION HEADER
   ============================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 12, 16, 0.82);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 16px 0;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-logo-img {
  height: 38px;
  width: auto;
  border-radius: var(--radius-sm);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-badge {
  font-size: 0.65rem;
  background: linear-gradient(135deg, var(--paxel-orange), var(--paxel-yellow));
  color: #000;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--paxel-orange);
}

.btn-deploy {
  background: linear-gradient(135deg, var(--paxel-orange), #E0480C);
  color: #FFFFFF;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(255, 94, 30, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-deploy:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 94, 30, 0.5);
}

/* ==============================================================================
   HERO SECTION
   ============================================================================== */
.hero-section {
  padding: 56px 0 32px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(45, 18, 92, 0.4);
  border: 1px solid rgba(255, 94, 30, 0.3);
  padding: 6px 16px;
  border-radius: 30px;
  font-size: 0.8rem;
  color: var(--paxel-yellow);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #FFFFFF 40%, #D1D5DB 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title span {
  background: linear-gradient(135deg, var(--paxel-orange), var(--paxel-yellow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 820px;
  margin: 0 auto 32px;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.stat-chip {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 800;
  color: #FFFFFF;
  font-family: var(--font-display);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==============================================================================
   3D WEBGL VIEWER CONTAINER
   ============================================================================== */
.viewer-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
  margin-bottom: 64px;
}

.viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(18, 21, 29, 0.7);
  flex-wrap: wrap;
  gap: 12px;
}

.viewer-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.viewer-dot {
  width: 10px;
  height: 10px;
  background: #10B981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10B981;
}

.viewer-title {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
}

.viewer-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-cam-preset {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-cam-preset:hover, .btn-cam-preset.active {
  background: var(--paxel-purple);
  border-color: var(--paxel-orange);
  color: #FFFFFF;
}

.model-viewport {
  width: 100%;
  height: 580px;
  position: relative;
  background: radial-gradient(circle at center, #1A1E29 0%, #0D0F14 100%);
}

model-viewer {
  width: 100%;
  height: 100%;
  --poster-color: transparent;
  touch-action: pan-y;
}

.viewer-overlay-hint {
  position: absolute;
  bottom: 16px;
  left: 20px;
  background: rgba(0, 0, 0, 0.6);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==============================================================================
   FILTER TABS
   ============================================================================== */
.filter-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 36px;
}

.filter-tabs {
  display: flex;
  background: rgba(18, 21, 29, 0.9);
  padding: 6px;
  border-radius: 40px;
  border: 1px solid var(--border-subtle);
  gap: 6px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 22px;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.tab-btn:hover {
  color: #FFFFFF;
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--paxel-purple), var(--paxel-purple-light));
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(45, 18, 92, 0.5);
}

/* ==============================================================================
   MODEL CARDS GRID
   ============================================================================== */
.models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  margin-bottom: 72px;
}

.model-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.model-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 94, 30, 0.4);
  box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.7), var(--shadow-glow);
}

.card-media-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 ratio */
  overflow: hidden;
  background: #000000;
  cursor: pointer;
}

.card-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.model-card:hover .card-img {
  transform: scale(1.05);
}

.card-badges {
  position: absolute;
  top: 14px;
  left: 14px;
  display: flex;
  gap: 6px;
  z-index: 2;
}

.badge-tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-tag.freestanding {
  background: var(--badge-freestanding);
  color: #A5B4FC;
  border: 1px solid var(--badge-freestanding-border);
}

.badge-tag.attached {
  background: var(--badge-attached);
  color: #6EE7B7;
  border: 1px solid var(--badge-attached-border);
}

.card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-code {
  font-size: 0.75rem;
  color: var(--paxel-orange);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
  line-height: 1.3;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.5;
}

/* Material Swatches on Card */
.card-materials-section {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.mat-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.mat-swatch-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.mat-swatch-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 3px 10px 3px 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mat-swatch-chip:hover {
  background: rgba(255, 94, 30, 0.15);
  border-color: var(--paxel-orange);
  transform: translateY(-2px);
}

.swatch-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.swatch-name {
  font-size: 0.7rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* ==============================================================================
   MATERIAL SPECIFICATION BOARD SECTION
   ============================================================================== */
.materials-catalog-section {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--paxel-orange);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.section-desc {
  max-width: 680px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.mat-catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.mat-detail-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
  cursor: pointer;
}

.mat-detail-card:hover {
  transform: translateY(-4px);
  border-color: var(--paxel-orange);
}

.mat-card-img-wrapper {
  width: 100%;
  height: 140px;
  overflow: hidden;
  position: relative;
}

.mat-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.mat-detail-card:hover .mat-card-img {
  transform: scale(1.08);
}

.mat-card-body {
  padding: 16px;
}

.mat-card-code {
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--paxel-yellow);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.mat-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 6px;
}

.mat-card-spec {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: 10px;
}

.mat-meta-tag {
  display: inline-block;
  font-size: 0.65rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2px 8px;
  color: var(--text-muted);
}

/* ==============================================================================
   ENGINEERING & DIMENSIONS SECTION
   ============================================================================== */
.blueprint-section {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border-subtle);
}

.blueprint-card {
  background: linear-gradient(135deg, rgba(22, 26, 36, 0.95), rgba(15, 18, 25, 0.95));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

@media (max-width: 900px) {
  .blueprint-card {
    grid-template-columns: 1fr;
  }
}

.blueprint-diagram {
  background: #090B0F;
  border: 1px dashed rgba(255, 94, 30, 0.4);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  font-family: monospace;
}

.spec-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.spec-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.spec-bullet {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 94, 30, 0.15);
  border: 1px solid var(--paxel-orange);
  color: var(--paxel-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  flex-shrink: 0;
  margin-top: 2px;
}

.spec-item-title {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.spec-item-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ==============================================================================
   COMPARISON MATRIX TABLE
   ============================================================================== */
.matrix-section {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border-subtle);
}

.table-responsive {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
  background: var(--bg-card);
}

.matrix-table th {
  background: rgba(18, 21, 29, 0.95);
  padding: 14px 18px;
  color: var(--text-secondary);
  font-weight: 700;
  border-bottom: 1px solid var(--border-subtle);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.matrix-table td {
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.matrix-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.tier-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 12px;
}

.tier-budget { background: rgba(16, 185, 129, 0.15); color: #10B981; border: 1px solid #10B981; }
.tier-mid { background: rgba(59, 130, 246, 0.15); color: #3B82F6; border: 1px solid #3B82F6; }
.tier-premium { background: rgba(245, 158, 11, 0.15); color: #F59E0B; border: 1px solid #F59E0B; }
.tier-flagship { background: rgba(236, 72, 153, 0.15); color: #EC4899; border: 1px solid #EC4899; }

/* ==============================================================================
   DEPLOYMENT GUIDE CARD
   ============================================================================== */
.deploy-guide-section {
  padding: 48px 0 80px;
  border-top: 1px solid var(--border-subtle);
}

.deploy-banner {
  background: linear-gradient(135deg, rgba(45, 18, 92, 0.8), rgba(255, 94, 30, 0.2));
  border: 1px solid rgba(255, 94, 30, 0.4);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.deploy-banner h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.deploy-banner p {
  max-width: 700px;
  margin: 0 auto 28px;
  color: var(--text-secondary);
}

.deploy-steps {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.step-card {
  background: rgba(10, 12, 16, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  text-align: left;
  max-width: 260px;
}

.step-num {
  font-size: 0.75rem;
  color: var(--paxel-orange);
  font-weight: 800;
  margin-bottom: 4px;
}

.step-text {
  font-size: 0.85rem;
  color: var(--text-primary);
  font-weight: 600;
}

/* ==============================================================================
   MODAL POPUP (MATERIAL INSPECTOR & FULLSCREEN IMAGE)
   ============================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.85);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.9);
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #FFFFFF;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: background 0.2s ease;
  z-index: 10;
}

.modal-close-btn:hover {
  background: var(--paxel-orange);
}

.modal-hero-img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-body {
  padding: 28px;
}

.modal-code {
  font-size: 0.75rem;
  color: var(--paxel-orange);
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.modal-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.info-item {
  background: rgba(255, 255, 255, 0.03);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.info-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.info-value {
  font-size: 0.85rem;
  color: #FFFFFF;
  font-weight: 600;
}

.modal-desc-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-highlight);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.modal-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* ==============================================================================
   FOOTER
   ============================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 40px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ==============================================================================
   RESPONSIVE OPTIMIZATIONS (MOBILE, TABLET, SAFARI & EDGE)
   ============================================================================== */

@media (max-width: 992px) {
  .nav-links .nav-link {
    display: none;
  }
  .nav-links {
    gap: 12px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .brand-sub {
    display: none;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .hero-desc {
    font-size: 0.95rem;
    margin-bottom: 24px;
  }

  .hero-stats {
    gap: 12px;
  }

  .stat-chip {
    padding: 8px 16px;
    flex: 1 1 40%;
  }

  .stat-value {
    font-size: 1.15rem;
  }

  /* 3D WebGL Viewer Mobile Handling */
  .viewer-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
  }

  .viewer-controls {
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }

  .viewer-controls::-webkit-scrollbar {
    height: 4px;
  }

  .viewer-controls::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
  }

  .btn-cam-preset {
    flex-shrink: 0;
    padding: 6px 10px;
    font-size: 0.72rem;
  }

  .model-viewport {
    height: 380px;
  }

  /* Filter Tabs Horizontal Scroll on Mobile */
  .filter-wrapper {
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-tabs {
    white-space: nowrap;
    flex-shrink: 0;
  }

  .tab-btn {
    padding: 6px 14px;
    font-size: 0.78rem;
  }

  /* Models Grid 1 Column on Mobile */
  .models-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .materials-catalog-grid {
    grid-template-columns: 1fr;
  }

  /* Modal Optimization on Mobile */
  .modal-overlay {
    padding: 12px;
  }

  .modal-box {
    max-height: 88vh;
    padding-bottom: env(safe-area-inset-bottom, 16px);
  }

  .modal-hero-img {
    height: 190px;
  }

  .modal-body {
    padding: 20px 16px;
  }

  .modal-info-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .brand-title {
    font-size: 1.05rem;
  }

  .btn-deploy {
    padding: 6px 12px;
    font-size: 0.78rem;
  }

  .model-viewport {
    height: 320px;
  }

  .viewer-overlay-hint {
    display: none;
  }
}