:root {
  /* Colors */
  --bg-body: #09090b;
  --bg-card: #18181b;
  --bg-card-hover: #27272a;
  --border-color: #3f3f46;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --accent-color: #3b82f6;
  
  /* Spacing */
  --container-width: 1200px;
  --header-height: 80px;
  
  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* 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 rgba(59, 130, 246, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-primary);
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 16px;
}

h1 {
  font-size: 3.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.5rem;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}

h3 {
  font-size: 1.5rem;
}

p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.text-center { text-align: center; }
.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.lead {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 40px;
}

/* Navigation */
.navbar {
  height: var(--header-height);
  position: sticky;
  top: 0;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

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

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

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

.btn-outline:hover {
  border-color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-block {
  width: 100%;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card:hover {
  transform: translateY(-4px);
  border-color: #52525b;
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.icon-box {
  width: 64px;
  height: 64px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  margin-bottom: 24px;
}

/* How It Works */
.step-card {
  position: relative;
  text-align: center;
  padding: 24px;
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  margin: 0 auto 24px;
  box-shadow: var(--shadow-sm);
}

/* Benefits */
.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
  background: var(--bg-card);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.benefit-icon {
  color: var(--accent-color);
  flex-shrink: 0;
}

/* Logos */
.logo-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 40px;
  opacity: 0.5;
}

.logo-item {
  height: 32px;
  filter: grayscale(100%);
  transition: all 0.2s;
}

.logo-item:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* Utilities */
.mb-lg { margin-bottom: 64px; }
.mb-md { margin-bottom: 32px; }

/* Responsive */
@media (max-width: 1024px) {
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  h1 { font-size: 2.5rem; }
}

@media (max-width: 768px) {
  .grid-3, .grid-4, .grid-2 {
    grid-template-columns: 1fr;
  }
  .nav-links { display: none; }
  h1 { font-size: 2rem; }
  section { padding: 48px 0; }
  .logo-grid { justify-content: center; }
}