:root {
  /* Colors - Dark Mode Default */
  --bg-body: #09090b;
  --bg-card: #18181b;
  --bg-elevated: #27272a;
  
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  --border-color: #3f3f46;
  --border-hover: #52525b;
  
  /* Accents */
  --accent-cyan: #06b6d4;
  --accent-purple: #8b5cf6;
  --accent-blue: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #8B5CF6 100%);
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-md) 0;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: 3.5rem; line-height: 1.1; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }

p {
  color: var(--text-secondary);
  margin: 0 0 var(--space-md) 0;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

/* Layout Utilities */
.desktop-only {
  display: none;
}

@media (min-width: 768px) {
  .desktop-only {
    display: flex;
  }
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

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

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  h1 { font-size: 2.5rem; }
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Components */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--text-secondary);
  background: var(--border-color);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-md) 0;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
}

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

/* Hero Section */
.hero {
  padding: 120px 0 80px 0;
  text-align: center;
  background: radial-gradient(circle at top center, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all 0.2s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--accent-cyan);
}

/* Product Card Specifics */
.product-image {
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  position: relative;
  overflow: hidden;
}

.placeholder-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-sm) 0;
}

.specs-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-lg) 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.specs-list li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-cyan);
  margin-bottom: var(--space-sm);
}

.badge.purple {
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent-purple);
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: var(--space-3xl) 0;
  margin-top: var(--space-3xl);
  color: var(--text-secondary);
}

.footer-col h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}