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

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #1f2937;
  --text: #111827;
  --text-light: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --border: #e5e7eb;
  --success: #10b981;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

/* Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

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

.btn-secondary:hover {
  background: var(--bg-alt);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* Hero Section */
.hero {
  padding: 8rem 2rem 4rem;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.hero-demo {
  max-width: 600px;
  margin: 0 auto;
}

.demo-input {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.demo-input input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 1rem;
}

.demo-result {
  padding: 2rem;
  background: var(--secondary);
  border-radius: 0.5rem;
  color: white;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Features Section */
.features {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.features h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 1rem;
  text-align: center;
  transition: box-shadow 0.2s;
}

.feature-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-light);
}

/* Pricing Section */
.pricing {
  padding: 4rem 2rem;
  background: var(--bg-alt);
}

.pricing h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.pricing-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 3rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-card {
  padding: 2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 1rem;
  text-align: center;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.pricing-card .badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: 0.25rem 1rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.pricing-card h3 {
  margin-bottom: 1rem;
}

.price {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-light);
}

.pricing-card ul {
  list-style: none;
  margin-bottom: 2rem;
  text-align: left;
}

.pricing-card li {
  padding: 0.5rem 0;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pricing-card li::before {
  content: '✓';
  color: var(--success);
  font-weight: 700;
}

/* Code Example Section */
.code-example {
  padding: 4rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.code-example h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.code-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tab {
  padding: 0.5rem 1rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}

.tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.code-block {
  display: none;
  background: var(--secondary);
  color: #e5e7eb;
  padding: 1.5rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
}

.code-block.active {
  display: block;
}

/* Use Cases Section */
.use-cases {
  padding: 4rem 2rem;
  background: var(--bg-alt);
}

.use-cases h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.use-case {
  padding: 1.5rem;
  background: var(--bg);
  border-radius: 0.5rem;
}

.use-case h3 {
  margin-bottom: 0.5rem;
}

.use-case p {
  color: var(--text-light);
}

/* Footer */
footer {
  background: var(--secondary);
  color: white;
  padding: 4rem 2rem 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto 2rem;
}

.footer-section h4 {
  margin-bottom: 1rem;
}

.footer-section a {
  display: block;
  color: #9ca3af;
  text-decoration: none;
  padding: 0.25rem 0;
  transition: color 0.2s;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid #374151;
  color: #9ca3af;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .demo-input {
    flex-direction: column;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }
}