:root {
  /* Color Palette - Dark Mode Premium */
  --bg-body: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-highlight: #334155;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --primary: #2dd4bf; /* Teal 400 */
  --primary-hover: #14b8a6; /* Teal 500 */
  --primary-glow: rgba(45, 212, 191, 0.3);

  --accent: #818cf8; /* Indigo 400 */
  --accent-glow: rgba(129, 140, 248, 0.3);

  --border: #334155;
  --border-light: #475569;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  
  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px var(--primary-glow);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-hover);
}

ul, ol {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: var(--space-md);
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
}

p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: var(--space-xs);
  display: block;
}

.lead {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 60ch;
}

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

.container.narrow {
  max-width: 800px;
}

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

/* Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--primary);
  color: #0f172a;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 0 30px var(--primary-glow);
}

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

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

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

.card {
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: transform 0.2s, border-color 0.2s;
}

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.main-nav {
  display: none;
}

@media (min-width: 768px) {
  .main-nav {
    display: flex;
    gap: var(--space-md);
  }
  
  .main-nav a {
    color: var(--text-secondary);
    font-weight: 500;
  }
  
  .main-nav a:hover {
    color: var(--primary);
  }
}

/* Hero */
.hero {
  padding-top: calc(var(--space-xl) + 4rem);
  padding-bottom: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.hero-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(45, 212, 191, 0.15) 0%, rgba(15, 23, 42, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

/* Features Grid */
.feature-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  margin-top: var(--space-lg);
}

/* Stats */
.stats-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  text-align: center;
  margin-top: var(--space-lg);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: var(--space-md) 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-lg) 0;
  background: var(--bg-surface);
  margin-top: var(--space-xl);
}

.footer-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-bottom: var(--space-lg);
}

.footer-links a {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--primary);
}

.legal-row {
  border-top: 1px solid var(--border-light);
  padding-top: var(--space-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.legal-links {
  display: flex;
  gap: var(--space-md);
}

/* Utilities */
.text-center { text-align: center; }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }