/* ========================================
   GOLDEN GATE BIOSCIENCE - PREMIUM STYLES
   ========================================
   
   🎨 Implementation Notes:
   1. Add Google Fonts to <head> of ALL HTML files:
      <link rel="preconnect" href="https://fonts.googleapis.com">
      <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
      <link href="https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@400;600;700&family=Inter:wght@300;400;500;600&display=swap" rel="stylesheet">
   
   2. Add favicon & meta tags for polish:
      <link rel="icon" type="image/x-icon" href="favicon.ico">
      <meta name="description" content="Premium laboratory instruments from global brands">
   
   3. Convert key images to WebP format for performance
   ======================================== */

/* ===== CSS VARIABLES - DESIGN SYSTEM ===== */
:root {
    /* Color Palette - Sophisticated & Accessible */
    --color-bg-dark: #0a1419;
    --color-bg-darker: #070f12;
    --color-bg-card: rgba(255, 255, 255, 0.08);
    --color-bg-card-hover: rgba(255, 255, 255, 0.12);
    --color-border: rgba(255, 255, 255, 0.15);
    --color-border-hover: rgba(212, 175, 55, 0.4);
    
    /* Premium Gold System (avoid bright orange) */
    --color-gold-light: #f4e4a6;
    --color-gold: #d4af37;
    --color-gold-dark: #aa8c2c;
    --gradient-gold: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    --gradient-gold-hover: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
    
    /* Text Colors - Optimized for Contrast */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --text-tertiary: rgba(255, 255, 255, 0.65);
    --text-gold: #e6c973; /* Accessible gold for headings */
    
    /* Typography */
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing System (8px baseline) */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-xxl: 64px;
    
    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 25px;
    --radius-full: 9999px;
    
    /* Shadows - Layered for Depth */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 25px rgba(212, 175, 55, 0.25);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-modal: 1000;
    --z-tooltip: 1500;
  }
  
  /* ===== BASE RESET & TYPOGRAPHY ===== */
  *,
  *::before,
  *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-bg-dark), #1a2a33, #233a45);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    letter-spacing: 0.3px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

  /* Add to body in style.css */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: 
        radial-gradient(rgba(212, 175, 55, 0.03) 1px, transparent 1px),
        radial-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px, 35px 35px;
    background-position: 0 0, 15px 15px;
    pointer-events: none;
    z-index: -1;
    opacity: 0.6;
}
  
  /* Typography Scale */
  h1, h2, h3, h4, h5, h6,
  .logo span,
  .slide-text h1 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-gold);
    letter-spacing: 0.5px;
  }
  
  h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
  h2 { font-size: clamp(2rem, 4vw, 2.5rem); margin-bottom: var(--space-md); }
  h3 { font-size: clamp(1.5rem, 3vw, 1.8rem); margin-bottom: var(--space-sm); }
  p { margin-bottom: var(--space-sm); color: var(--text-secondary); }
  
  /* Links & Buttons Base */
  a {
    color: var(--text-gold);
    text-decoration: none;
    transition: color var(--transition-normal);
  }
  
  a:hover {
    color: var(--color-gold-light);
  }
  
  /* ===== HEADER & NAVIGATION ===== */
  .scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--gradient-gold);
    width: 0%;
    z-index: 9999;
    transition: width 0.1s ease;
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.5);
}
  
  header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    transition: all var(--transition-normal);
    background: transparent;
  }
  
  header.scrolled {
    padding: var(--space-sm) var(--space-lg);
    background: rgba(10, 20, 25, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
  }
  
  .logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1.4rem;
    font-weight: 700;
  }
  
  .logo svg {
    transition: transform var(--transition-normal);
  }
  
  .logo:hover svg {
    transform: scale(1.05);
  }
  
  nav {
    display: flex;
    gap: var(--space-md);
  }
  
  nav a {
    position: relative;
    padding: var(--space-xs) var(--space-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-normal);
  }
  
  nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-gold);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
  }
  
  nav a:hover,
  nav a.active {
    color: var(--text-gold);
  }
  
  nav a:hover::after,
  nav a.active::after {
    width: 70%;
  }
  
  nav a.active {
    font-weight: 600;
  }
  
  /* ===== HERO SECTION (All Pages) ===== */
  .hero {
    width: 100%;
    max-width: 1200px;
    margin: var(--space-xxl) auto;
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }
  
  .hero h1 {
    margin-bottom: var(--space-sm);
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
  }
  
  .hero p {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto var(--space-lg);
    opacity: 0.95;
  }
  
  /* ===== BUTTONS - PREMIUM STYLING ===== */
  .btn,
  .cta-btn,
  .contact-form-section button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    background: var(--gradient-gold);
    color: var(--color-bg-dark);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
  }
  
  .btn::before,
  .cta-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-gold-hover);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: -1;
  }
  
  .btn:hover,
  .cta-btn:hover,
  .contact-form-section button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow), var(--shadow-md);
  }
  
  .btn:hover::before,
  .cta-btn:hover::before {
    opacity: 1;
  }
  
  .btn:active,
  .cta-btn:active {
    transform: translateY(-1px);
  }
  
  /* ===== GLASSMORPHISM CARD SYSTEM ===== */
  .product-card,
  .feature-card,
  .testimonial-card,
  .highlight-card,
  .case-card,
  .about-us,
  .contact-form-section,
  .form-section,
  .contact-cta {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-bounce), 
                box-shadow var(--transition-normal),
                border-color var(--transition-normal);
    position: relative;
    overflow: hidden;
  }
  
  /* Premium border glow effect on hover */
  .product-card::before,
  .feature-card::before,
  .testimonial-card::before,
  .highlight-card::before,
  .case-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--gradient-gold);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
    z-index: 1;
  }
  
  .product-card:hover,
  .feature-card:hover,
  .testimonial-card:hover,
  .highlight-card:hover,
  .case-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: transparent;
    background: var(--color-bg-card-hover);
  }
  
  .product-card:hover::before,
  .feature-card:hover::before,
  .testimonial-card:hover::before,
  .highlight-card:hover::before,
  .case-card:hover::before {
    opacity: 1;
  }
  
  /* ===== PRODUCT CARDS ===== */
  .products-container {
    width: 100%;
    max-width: 1400px;
    margin: var(--space-xl) auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
  }
  
  .product-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    cursor: pointer;
  }
  
  .product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-slow);
    background: rgba(0,0,0,0.1);
  }
  
  .product-card:hover img {
    transform: scale(1.05);
  }
  
  .product-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
    color: var(--text-gold);
  }
  
  .product-card p {
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
  }
  
  .product-card p strong {
    color: var(--text-primary);
    font-weight: 600;
  }
  
  /* ===== PRODUCT FILTERS ===== */
  .product-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    margin: var(--space-lg) auto var(--space-xl);
    max-width: 800px;
    padding: 0 var(--space-md);
  }
  
  .product-filters input,
  .product-filters select {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
    outline: none;
    font-family: var(--font-body);
    font-size: 1rem;
    min-width: 200px;
    transition: all var(--transition-normal);
  }
  
  .product-filters input:focus,
  .product-filters select:focus {
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
    background: rgba(255,255,255,0.1);
  }
  
  .product-filters input::placeholder {
    color: var(--text-tertiary);
  }
  
  .product-filters select option {
    background: var(--color-bg-dark);
    color: var(--text-primary);
  }
  
  /* ===== HERO SLIDER - CINEMATIC UPGRADE ===== */
  .hero-slider {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    margin: 0;
    margin-top: -50px;
  }
  
  .slides-container {
    position: relative;
    width: 100%;
    height: 100%;
  }
  
  .slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
    z-index: 1;
  }
  
  .slide::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
      to bottom,
      rgba(10,20,25,0.7),
      rgba(10,20,25,0.5),
      rgba(10,20,25,0.9)
    );
    z-index: 2;
  }
  
  .slide.active {
    opacity: 1;
    z-index: 3;
  }
  
  .slide img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    animation: zoomEffect 12s ease-in-out infinite alternate;
    transition: transform 0.3s ease-out;
  }
  
  .hero-slider:hover .slide img {
    transform: scale(1.02);
  }
  
  @keyframes zoomEffect {
    from { transform: scale(1); }
    to { transform: scale(1.03); }
  }
  
  /* Subtle animated overlay particles */
  .hero-slider::after {
    content: '';
    position: absolute;
    inset: 0;
    background: 
      radial-gradient(circle at 20% 30%, rgba(212,175,55,0.08) 0%, transparent 25%),
      radial-gradient(circle at 80% 70%, rgba(212,175,55,0.05) 0%, transparent 30%);
    pointer-events: none;
    animation: pulse 10s ease-in-out infinite;
    z-index: 4;
  }
  
  @keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
  }
  
  .slide-text {
    position: absolute;
    bottom: 15%;
    left: 8%;
    color: white;
    max-width: 700px;
    z-index: 5;
    opacity: 0;
    transform: translateY(30px);
    transition: all 1s ease;
    text-shadow: 0 2px 15px rgba(0,0,0,0.6);
    background: linear-gradient(to right, rgba(10,20,25,0.85), transparent);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(5px);
  }
  
  .slide.active .slide-text {
    opacity: 1;
    transform: translateY(0);
  }
  
  .slide-text h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--space-sm);
    color: var(--text-gold);
    text-shadow: 0 3px 15px rgba(0,0,0,0.4);
  }
  
  .slide-text p {
    font-size: 1.25rem;
    line-height: 1.7;
    opacity: 0.95;
    max-width: 600px;
  }
  
  /* Slider Controls */
  .hero-slider .prev,
  .hero-slider .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2.5rem;
    background: rgba(10,20,25,0.7);
    color: var(--text-gold);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    width: 55px;
    height: 55px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
  }
  
  .hero-slider .prev:hover,
  .hero-slider .next:hover {
    background: rgba(212,175,55,0.2);
    color: var(--color-gold-light);
    transform: translateY(-50%) scale(1.1);
    border-color: var(--color-gold);
  }
  
  .hero-slider .prev { left: var(--space-md); }
  .hero-slider .next { right: var(--space-md); }
  
  /* Slider Dots */
  .hero-slider .dots-container {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-xs);
    z-index: 10;
  }
  
  .hero-slider .dot {
    width: 14px;
    height: 14px;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.4);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
  }
  
  .hero-slider .dot:hover {
    background: rgba(255,255,255,0.7);
    transform: scale(1.1);
  }
  
  .hero-slider .dot.active {
    background: transparent;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.3);
  }
  
  /* ===== FEATURES / WHY CHOOSE US ===== */
  .features-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-md);
  }
  
  .feature-card {
    text-align: center;
    padding: var(--space-lg);
  }
  
  .feature-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.4rem;
  }
  
  .feature-card p {
    font-size: 1rem;
  }
  
  /* ===== BRANDS SECTION ===== */
  .brands-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-md);
  }
  
  .brands-container img {
    width: 140px;
    height: 140px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    padding: var(--space-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border);
    filter: grayscale(100%) opacity(0.7);
    transition: all 0.4s ease;
  }
  
  .brands-container img:hover {
    transform: scale(1.08) translateY(-5px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--color-gold);
    background: rgba(255, 255, 255, 0.1);
    filter: grayscale(0%) opacity(1);
    transform: scale(1.08) translateY(-5px);
  }
  
  /* ===== CONTACT PAGE LAYOUT ===== */
  .contact-container {
    width: 100%;
    max-width: 1200px;
    margin: var(--space-xxl) auto;
    padding: 0 var(--space-md);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
  }
  
  .company-info,
  .contact-form-section {
    width: 100%;
  }
  
  .contact-details {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
  }
  
  .contact-details p {
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
  }
  
  .contact-details p::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--color-gold);
    border-radius: var(--radius-full);
  }
  
  /* ===== FORM STYLING ===== */
  .contact-form-section form,
  #productForm {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .contact-form-section input,
  .contact-form-section textarea,
  #productForm input,
  #productForm textarea {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-normal);
    outline: none;
  }
  
  .contact-form-section input:focus,
  .contact-form-section textarea:focus,
  #productForm input:focus,
  #productForm textarea:focus {
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
    background: rgba(255,255,255,0.1);
  }
  
  .contact-form-section textarea,
  #productForm textarea {
    min-height: 120px;
    resize: vertical;
  }
  
  .contact-form-section input::placeholder,
  .contact-form-section textarea::placeholder,
  #productForm input::placeholder,
  #productForm textarea::placeholder {
    color: var(--text-tertiary);
  }
  
  /* ===== SECTIONS COMMON STYLING ===== */
  section {
    padding: var(--space-xxl) var(--space-md);
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
  }
  
  section h2 {
    text-align: center;
    margin-bottom: var(--space-xl);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
  }
  
  section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-gold);
    border-radius: var(--radius-full);
  }
  
  /* ===== ANIMATIONS ON SCROLL ===== */
  .animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  }
  
  .animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
  }
  
  /* Staggered animation for product cards */
  .product-card.animate-on-scroll {
    transition-delay: calc(var(--i) * 0.1s);
  }
  
  /* ===== PREMIUM PRODUCT LIGHTBOX ===== */
  .product-lightbox {
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at center,
      rgba(10,20,25,0.85) 0%,
      rgba(7,15,18,0.95) 100%);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    z-index: var(--z-modal);
    padding: var(--space-lg);
  }
  
  .product-lightbox.active {
    opacity: 1;
    visibility: visible;
  }
  
  .lightbox-content {
    background: linear-gradient(135deg, var(--color-bg-dark), #1a2a33, #233a45);
    backdrop-filter: blur(30px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    max-width: 1000px;
    width: 100%;
    display: flex;
    gap: var(--space-xl);
    padding: var(--space-xl);
    transform: translateY(40px) scale(0.97);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
  }
  
  .product-lightbox.active .lightbox-content {
    transform: translateY(0) scale(1);
  }
  
  .lightbox-content img {
    width: 45%;
    max-height: 500px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--color-border);
    transition: transform var(--transition-slow);
  }
  
  .lightbox-content img:hover {
    transform: scale(1.02);
  }
  
  .lightbox-content .text-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-md);
  }
  
  .lightbox-content h2 {
    font-size: 2rem;
    margin: 0;
    text-align: left;
  }
  
  .lightbox-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    margin: 0;
  }
  
  .lightbox-content .cta-btn {
    margin-top: var(--space-sm);
    align-self: flex-start;
  }
  
  .close-lightbox {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 2rem;
    color: var(--text-tertiary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--color-border);
  }
  
  .close-lightbox:hover {
    color: var(--text-gold);
    background: rgba(212,175,55,0.15);
    border-color: var(--color-gold);
    transform: rotate(90deg);
  }
  
  /* Lightbox Responsive */
  @media (max-width: 900px) {
    .lightbox-content {
      flex-direction: column;
      padding: var(--space-lg);
      gap: var(--space-lg);
    }
    
    .lightbox-content img {
      width: 100%;
      max-height: 300px;
    }
    
    .lightbox-content .text-area {
      text-align: center;
    }
    
    .lightbox-content .cta-btn {
      align-self: center;
    }
  }
  
  /* ===== RESEARCH HIGHLIGHTS & CASE STUDIES ===== */
  .highlights-container,
  .case-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-md);
  }
  
  .highlight-card,
  .case-card {
    border-radius: var(--radius-md);
    overflow: hidden;
  }
  
  .highlight-card img,
  .case-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: transform var(--transition-slow);
  }
  
  .highlight-card:hover img,
  .case-card:hover img {
    transform: scale(1.05);
  }
  
  .highlight-card h3,
  .case-card h3 {
    text-align: center;
    padding: var(--space-md) var(--space-sm) var(--space-sm);
    margin: 0;
    font-size: 1.3rem;
  }
  
  /* ===== CALL TO ACTION SECTION ===== */
  .contact-cta {
    text-align: center;
    padding: var(--space-xxl) var(--space-lg);
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(15px);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    margin: var(--space-xxl) auto;
    max-width: 900px;
  }
  
  .contact-cta h2 {
    margin-bottom: var(--space-sm);
  }
  
  .contact-cta p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto var(--space-lg);
  }
  
  /* ===== FOOTER (NEW - Premium Addition) ===== */
  .site-footer {
    background: var(--color-bg-darker);
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) var(--space-md) var(--space-md);
    margin-top: var(--space-xxl);
  }
  
  .footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
  }
  
  .footer-brand .logo {
    margin-bottom: var(--space-sm);
  }
  
  .footer-brand p {
    font-size: 0.95rem;
    opacity: 0.8;
  }
  
  .footer-links h4 {
    color: var(--text-gold);
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
  }
  
  .footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
  }
  
  .footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
  }
  
  .footer-links a:hover {
    color: var(--text-gold);
    padding-left: 4px;
  }
  
  .footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: 0.9rem;
    color: var(--text-tertiary);
  }
  
  .back-to-top {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    color: var(--text-gold);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1.2rem;
  }
  
  .back-to-top:hover {
    background: var(--gradient-gold);
    color: var(--color-bg-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
  }
  
  /* ===== ACCESSIBILITY & UTILITIES ===== */
  /* Focus states for keyboard navigation */
  a:focus,
  button:focus,
  input:focus,
  textarea:focus,
  select:focus {
    outline: 2px solid var(--color-gold);
    outline-offset: 2px;
  }
  
  /* Skip link for accessibility */
  /* Add to style.css */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-gold);
    color: var(--color-bg-dark);
    padding: 8px 16px;
    z-index: 2000;
    transition: top 0.2s;
    font-weight: 600;
}
.skip-link:focus {
    top: 0;
}
  
  /* Reduced motion preference */
  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
      scroll-behavior: auto !important;
    }
    
    .hero-slider,
    .slide img {
      animation: none !important;
    }
  }
  
  /* High contrast mode support */
  @media (prefers-contrast: high) {
    :root {
      --color-border: rgba(255, 255, 255, 0.4);
      --text-secondary: rgba(255, 255, 255, 0.95);
    }
    
    .btn, .cta-btn {
      border: 2px solid var(--color-gold);
    }
  }
  
  /* ===== RESPONSIVE DESIGN ===== */
  @media (max-width: 1024px) {
    :root {
      --space-lg: 28px;
      --space-xl: 40px;
      --space-xxl: 56px;
    }
    
    header {
      padding: var(--space-sm) var(--space-md);
    }
    
    header.scrolled {
      padding: var(--space-xs) var(--space-md);
    }
    
    nav a {
      padding: var(--space-xs);
      font-size: 0.95rem;
    }
    
    .hero-slider .prev,
    .hero-slider .next {
      width: 48px;
      height: 48px;
      font-size: 2rem;
    }
    
    .slide-text {
      left: 5%;
      right: 5%;
      bottom: 10%;
      padding: var(--space-sm) var(--space-md);
    }
    
    .slide-text h1 {
      font-size: clamp(2rem, 6vw, 3rem);
    }
  }
  
  @media (max-width: 768px) {
    :root {
      --space-md: 20px;
      --space-lg: 24px;
    }
    
    header {
      flex-direction: column;
      gap: var(--space-sm);
      padding: var(--space-sm);
    }
    
    nav {
      gap: var(--space-sm);
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .hero {
      margin: var(--space-xl) var(--space-sm);
      padding: var(--space-lg);
    }
    
    .products-container,
    .features-container,
    .brands-container,
    .highlights-container,
    .case-container {
      grid-template-columns: 1fr;
      padding: 0 var(--space-sm);
    }
    
    .brands-container img {
      width: 120px;
      height: 120px;
    }
    
    .contact-container {
      grid-template-columns: 1fr;
      padding: 0 var(--space-sm);
    }
    
    .product-filters {
      flex-direction: column;
      align-items: center;
    }
    
    .product-filters input,
    .product-filters select {
      width: 100%;
      max-width: 350px;
    }
    
    .lightbox-content {
      padding: var(--space-md);
      margin: var(--space-sm);
    }
    
    .footer-content {
      grid-template-columns: 1fr;
      text-align: center;
    }
    
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }
  
  @media (max-width: 480px) {
    :root {
      --space-sm: 12px;
      --space-md: 16px;
      --space-lg: 20px;
    }
    
    body {
      font-size: 15px;
    }
    
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.4rem; }
    
    .logo {
      font-size: 1.2rem;
    }
    
    .logo svg {
      height: 60px;
      width: 60px;
    }
    
    nav a {
      font-size: 0.9rem;
      padding: 4px 8px;
    }
    
    .btn, .cta-btn {
      padding: 10px 24px;
      font-size: 0.95rem;
    }
    
    .hero-slider .prev,
    .hero-slider .next {
      width: 40px;
      height: 40px;
      font-size: 1.5rem;
      left: 10px;
      right: 10px;
    }
    
    .slide-text {
      padding: var(--space-xs) var(--space-sm);
    }
    
    .slide-text h1 {
      font-size: 1.8rem;
    }
    
    .slide-text p {
      font-size: 1rem;
    }
    
    .product-card img {
      height: 180px;
    }
    
    section {
      padding: var(--space-xl) var(--space-sm);
    }
    
    section h2::after {
      width: 50px;
    }
  }
  
  /* ===== PRINT STYLES ===== */
  @media print {
    body {
      background: white;
      color: black;
      font-size: 12pt;
    }
    
    header, .hero-slider, .btn, .product-lightbox {
      display: none;
    }
    
    .product-card, .feature-card {
      break-inside: avoid;
      border: 1px solid #ccc;
      background: white;
      color: black;
    }
  }



  .fab-contact {
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--gradient-gold);
    color: var(--color-bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow), var(--shadow-md);
    z-index: 1000;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.fab-contact:hover {
    transform: scale(1.1) translateY(-3px);
    box-shadow: 0 15px 35px rgba(212, 175, 55, 0.5);
}

.fab-contact svg {
    transition: transform 0.3s ease;
}

.fab-contact:hover svg {
    transform: scale(1.1);
}

/* Hide on desktop if you prefer */
@media (min-width: 1024px) {
    .fab-contact {
        display: none;
    }
}





.stats-section {
    padding: var(--space-xxl) var(--space-md);
    background: linear-gradient(135deg, rgba(212,175,55,0.08), rgba(10,20,25,0.3));
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.stats-section h2 {
    margin-bottom: var(--space-xl);
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.stat-card {
    text-align: center;
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-gold);
    line-height: 1;
}

.stat-suffix {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--text-gold);
    vertical-align: super;
}

.stat-card p {
    margin-top: var(--space-xs);
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Subtle text shadow for better readability on images */
.slide-text h1,
.slide-text p {
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* Smooth image loading fade-in */
img {
    transition: opacity 0.3s ease;
}
img:not([src]) {
    opacity: 0;
}

/* Elegant focus ring for keyboard users */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}


#product-hero {
    width: 100%;
    max-width: 100%;
    transition: 1s ease;
}

#product-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--gradient-gold);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
    z-index: 1;
  }
  
  #product-hero:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: transparent;
    background: var(--color-bg-card-hover);
    transition: 1s ease;
  }
  
  #product-hero:hover::before {
    opacity: 1;
  }



  /* ===== PRODUCT CARD CONTENT LAYOUT ===== */
.product-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.product-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    flex: 1;
}

.product-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
    color: var(--text-gold);
    line-height: 1.3;
}

.product-card p strong {
    color: var(--text-primary);
    font-weight: 600;
}

.product-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    flex: 1; /* Pushes button to bottom */
}

/* ===== MORE INFO BUTTON ===== */
.btn-more-info {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-top: auto; /* Pushes to bottom of card */
    width: fit-content;
}

.btn-more-info::after {
    content: '→';
    font-size: 1rem;
    transition: transform var(--transition-normal);
}

.btn-more-info:hover {
    border-color: var(--color-gold);
    color: var(--text-gold);
    background: rgba(212, 175, 55, 0.1);
    transform: translateX(3px);
}

.btn-more-info:hover::after {
    transform: translateX(4px);
}

.btn-more-info:active {
    transform: translateX(1px);
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 768px) {
    .btn-more-info {
        width: 100%;
        justify-content: center;
    }
    
    .product-card h3 {
        font-size: 1.15rem;
    }
}

/* ===== ACCESSIBILITY ===== */
.btn-more-info:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 2px;
}



#lightboxDescription {
    text-align: justify;
}