/* ========================================
   SCENG Robotics - Industrial Dark Theme
   CSS Styles
   ======================================== */

/* CSS Variables */
:root {
  /* Colors - Industrial Dark Theme */
  --primary: #0d0d0d;
  --primary-light: #1a1a1a;
  --secondary: #2a2a2a;
  --tertiary: #333333;
  --accent: #0ea5e9;
  --accent-hover: #0284c7;
  --accent-light: rgba(14, 165, 233, 0.1);
  --accent-glow: rgba(14, 165, 233, 0.3);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  /* Neutrals - Dark Theme */
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Dark Theme Specific */
  --bg-primary: var(--primary);
  --bg-secondary: var(--primary-light);
  --bg-tertiary: var(--secondary);
  --text-primary: #ffffff;
  --text-secondary: #e2e8f0;
  --text-tertiary: #94a3b8;
  --border-primary: #333333;
  --border-secondary: #222222;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows - Industrial Style */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.6), 0 2px 4px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.7), 0 4px 6px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.8), 0 8px 10px rgba(0, 0, 0, 0.7);
  --shadow-accent: 0 0 15px var(--accent-glow);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-industrial: 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
  
  /* Container */
  --container-max: 1280px;
  --container-padding: 1.5rem;
  
  /* Industrial UI Details */
  --letter-spacing-wide: 0.05em;
  --letter-spacing-wider: 0.1em;
  --gradient-accent: linear-gradient(90deg, var(--accent) 0%, var(--accent-hover) 100%);
  --gradient-bg: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
  background-color: var(--bg-primary);
  letter-spacing: 0.01em;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  filter: brightness(0.9) contrast(1.1);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-base);
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  color: var(--text-primary);
  transition: all var(--transition-base);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }

/* Text Colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-accent { color: var(--accent); }

/* Responsive Typography */
@media (max-width: 1024px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.375rem; }
  h4 { font-size: 1.125rem; }
  
  .text-lg { font-size: 1rem; }
  .text-xl { font-size: 1.125rem; }
  
  .hero-title {
    font-size: 2.75rem;
  }
  
  .hero-image {
    opacity: 0.08;
    right: -10%;
    width: 60%;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }
  h4 { font-size: 1rem; }
  
  .text-lg { font-size: 0.9375rem; }
  .text-xl { font-size: 1rem; }
  
  p {
    font-size: 0.9375rem;
  }
  
  .hero {
    min-height: auto;
    padding: calc(72px + var(--space-3xl)) 0 var(--space-3xl);
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .hero-text {
    font-size: 1rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .hero-stat {
    text-align: center;
  }
  
  .hero-image {
    display: none;
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .nav {
    display: none;
  }
  
  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.125rem; }
  h4 { font-size: 0.9375rem; }
  
  .text-lg { font-size: 0.875rem; }
  .text-xl { font-size: 0.9375rem; }
  
  p {
    font-size: 0.875rem;
  }
  
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .hero-title {
    font-size: 1.875rem;
  }
  
  .hero-stat-number {
    font-size: 2rem;
  }
  
  .btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }
  
  .btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
  }
  
  .btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
  }
}

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 900; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-uppercase { text-transform: uppercase; }
.text-industrial { 
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  font-weight: 700;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Section */
.section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--border-primary) 50%, transparent 100%);
}

.section-sm {
  padding: var(--space-2xl) 0;
}

.section-lg {
  padding: var(--space-4xl) 0;
}

/* Backgrounds */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-tertiary { background-color: var(--bg-tertiary); }
.bg-accent { background-color: var(--accent); }

/* Flexbox */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

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

.justify-between {
  justify-content: space-between;
}

.justify-start {
  justify-content: flex-start;
}

.justify-end {
  justify-content: flex-end;
}

.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }
.gap-4 { gap: var(--space-lg); }
.gap-6 { gap: var(--space-xl); }
.gap-8 { gap: var(--space-2xl); }

/* Grid */
.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }

/* Responsive Grid */
@media (max-width: 1280px) {
  .grid-cols-5 {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 1024px) {
  .grid-cols-4,
  .grid-cols-5 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  .grid-cols-4,
  .grid-cols-5,
  .grid-cols-3,
  .grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .hero-stat {
    text-align: center;
  }
  
  .nav {
    display: none;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .mobile-nav {
    display: block;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .hero-title {
    font-size: 1.875rem;
  }
  
  .hero-stat-number {
    font-size: 2rem;
  }
  
  .btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }
  
  .btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
  }
  
  .btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-primary);
  cursor: pointer;
  transition: all var(--transition-industrial);
  white-space: nowrap;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent 0%, var(--accent-light) 50%, transparent 100%);
  transition: left var(--transition-industrial);
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--white);
  border-color: var(--accent);
  box-shadow: 0 0 0 rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 0 20px var(--accent-glow), 0 0 40px var(--accent-glow);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-primary);
}

.btn-secondary:hover {
  background-color: var(--secondary);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-light);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
  position: relative;
}

.btn-outline::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity var(--transition-industrial);
  box-shadow: 0 0 15px var(--accent-glow);
}

.btn-outline:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-light);
  transform: translateY(-1px);
}

.btn-outline:hover::after {
  opacity: 1;
}

.btn-white {
  background-color: var(--white);
  color: var(--primary);
  border-color: var(--white);
  box-shadow: 0 0 0 rgba(255, 255, 255, 0.3);
}

.btn-white:hover {
  background-color: var(--gray-100);
  border-color: var(--gray-100);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.3), 0 0 40px rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* Cards */
.card {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-primary);
  overflow: hidden;
  transition: all var(--transition-industrial);
  position: relative;
  box-shadow: var(--shadow-md);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-industrial);
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity var(--transition-industrial);
  box-shadow: 0 0 20px var(--accent-glow);
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: var(--accent);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover::after {
  opacity: 1;
}

.card-body {
  padding: var(--space-lg);
}

.card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  background-color: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-primary);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
}

.card-text {
  color: var(--text-tertiary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background-color: var(--accent-light);
  color: var(--accent);
  border: 1px solid var(--border-primary);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.badge-gray {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border-color: var(--border-primary);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-primary);
  transition: all var(--transition-base);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
}

.logo-icon {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  position: relative;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-industrial);
  padding: var(--space-sm) 0;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition-industrial);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  text-shadow: 0 0 10px var(--accent-glow);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  background: none;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-secondary);
  transition: all var(--transition-base);
}

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  padding: var(--space-lg);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
  border-left: 1px solid var(--border-primary);
  z-index: 999;
  display: none;
}

.mobile-nav.active {
  transform: translateX(0);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-md) 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-primary);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  transition: all var(--transition-industrial);
  position: relative;
}

.mobile-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition-industrial);
}

.mobile-nav-link:hover {
  color: var(--accent);
  text-shadow: 0 0 10px var(--accent-glow);
}

.mobile-nav-link:hover::after {
  width: 100%;
}

/* Media Query Adjustments */
@media (max-width: 768px) {
  .mobile-nav {
    display: block;
  }
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  background: linear-gradient(rgba(13, 13, 13, 0.9), rgba(26, 26, 26, 0.95)), url('../images/bg1.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 80%, var(--accent-glow) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, var(--accent-glow) 0%, transparent 50%);
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 2px,
    rgba(14, 165, 233, 0.03) 2px,
    rgba(14, 165, 233, 0.03) 4px
  );
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  letter-spacing: var(--letter-spacing-wide);
}

.hero-title span {
  color: var(--accent);
  text-shadow: 0 0 20px var(--accent-glow);
}

.hero-text {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-primary);
}

.hero-stat {
  text-align: left;
}

.hero-stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 0 10px var(--accent-glow);
}

.hero-stat-label {
  font-size: 0.9375rem;
  color: var(--text-tertiary);
  margin-top: var(--space-xs);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.hero-image {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 50%;
  max-width: 800px;
  opacity: 0.15;
  filter: brightness(0.7) contrast(1.2) sepia(0.2);
}

/* Page Header */
.page-header {
  padding-top: calc(72px + var(--space-3xl));
  padding-bottom: var(--space-3xl);
  background: var(--gradient-bg);
  border-bottom: 1px solid var(--border-primary);
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 2px,
    rgba(14, 165, 233, 0.02) 2px,
    rgba(14, 165, 233, 0.02) 4px
  );
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}

.breadcrumb a {
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb span {
  color: var(--border-primary);
}

.page-title {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
  position: relative;
  z-index: 1;
}

.page-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 640px;
  position: relative;
  z-index: 1;
}

/* Category Card */
.category-card {
  position: relative;
  padding: var(--space-xl);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-industrial);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-industrial);
}

.category-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity var(--transition-industrial);
  box-shadow: 0 0 20px var(--accent-glow);
}

.category-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: var(--accent);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-card:hover::after {
  opacity: 1;
}

.category-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-light);
  color: var(--accent);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-primary);
}

.category-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.category-description {
  color: var(--text-tertiary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.category-count {
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

/* Product Card */
.product-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-industrial);
  position: relative;
  box-shadow: var(--shadow-md);
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-industrial);
}

.product-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity var(--transition-industrial);
  box-shadow: 0 0 20px var(--accent-glow);
}

.product-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: var(--accent);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card:hover::after {
  opacity: 1;
}

.product-image {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background-color: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-primary);
}

.product-body {
  padding: var(--space-md);
}

.product-category {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-bottom: var(--space-sm);
}

.product-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
}

.product-description {
  font-size: 0.9375rem;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  transition: all var(--transition-base);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  position: relative;
  z-index: 10;
}

.product-link:hover {
  gap: var(--space-sm);
  text-shadow: 0 0 10px var(--accent-glow);
}

/* Feature Box */
.feature-box {
  padding: var(--space-xl);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-industrial);
  position: relative;
  box-shadow: var(--shadow-md);
}

.feature-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform var(--transition-industrial);
}

.feature-box:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--accent-light);
  transform: translateY(-2px);
}

.feature-box:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-light);
  color: var(--accent);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border-primary);
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.feature-text {
  color: var(--text-tertiary);
  font-size: 0.9375rem;
}

/* Footer */
.footer {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  padding: var(--space-4xl) 0 var(--space-xl);
  border-top: 1px solid var(--border-primary);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 0.5fr 1.8fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.footer-description {
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  color: var(--text-tertiary);
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-primary);
  padding-bottom: var(--space-sm);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  font-size: 0.9375rem;
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.footer-link:hover {
  color: var(--accent);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--border-primary);
}

.social-link:hover {
  background-color: var(--accent);
  color: var(--white);
  border-color: var(--accent);
  box-shadow: var(--shadow-accent);
}

/* Contact Page */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.contact-info {
  padding: var(--space-xl);
  background-color: var(--gray-50);
  border-radius: var(--radius-xl);
}

.contact-item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.contact-item:last-child {
  margin-bottom: 0;
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--white);
  color: var(--accent);
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}

.contact-label {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: var(--space-xs);
}

.contact-value {
  font-size: 1rem;
  color: var(--gray-900);
  font-weight: 500;
}

/* Form */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  color: var(--gray-700);
  background-color: var(--white);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

/* About Page */
.about-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-image {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-xl);
  background-color: var(--gray-100);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.value-card {
  padding: var(--space-xl);
  background-color: var(--gray-50);
  border-radius: var(--radius-xl);
  text-align: center;
}

.value-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-light);
  color: var(--accent);
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-md);
}

.value-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.value-text {
  font-size: 0.9375rem;
  color: var(--gray-500);
}

/* Certifications */
.certifications {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  flex-wrap: wrap;
}

.certification {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-xl);
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
}

.certification-icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
}

.certification-name {
  font-weight: 600;
  color: var(--gray-700);
}

/* Utility Classes */
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-6 { margin-top: var(--space-xl); }
.mt-8 { margin-top: var(--space-2xl); }
.mt-12 { margin-top: var(--space-4xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-6 { margin-bottom: var(--space-xl); }
.mb-8 { margin-bottom: var(--space-2xl); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease forwards;
}

.animate-slideIn {
  animation: slideIn 0.6s ease forwards;
}

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --container-padding: 1.25rem;
  }
  
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  
  .hero-title {
    font-size: 2.75rem;
  }
  
  .hero-image {
    opacity: 0.08;
    right: -10%;
    width: 60%;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }
  
  .about-section {
    gap: var(--space-2xl);
  }
  
  .values-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  
  .nav {
    display: none;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .mobile-nav {
    display: block;
  }
  
  .hero {
    min-height: auto;
    padding: calc(72px + var(--space-3xl)) 0 var(--space-3xl);
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .hero-text {
    font-size: 1rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .hero-stat {
    text-align: center;
  }
  
  .hero-image {
    display: none;
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .about-section {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    order: -1;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .hero-title {
    font-size: 1.875rem;
  }
  
  .hero-stat-number {
    font-size: 2rem;
  }
}