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

:root {
  /* Colors */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --secondary: #64748b;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --background: #ffffff;
  --surface: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --shadow: rgba(15, 23, 42, 0.1);

  /* Typography */
  --font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu",
    "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  --font-mono:
    "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New",
    monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition: all 0.2s ease-in-out;
}

html {
  scroll-behavior: smooth;
}

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

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

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-md) 0;
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.logo img {
  width: 40px;
  height: 40px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

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

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

.nav-cta {
  display: flex;
  gap: var(--spacing-md);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

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

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

.btn-large {
  padding: 0.875rem 2rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* Hero Section */
.hero {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.hero-stats {
  display: flex;
  gap: var(--spacing-2xl);
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.hero-image img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 60px var(--shadow);
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* Features Section */
.features {
  padding: var(--spacing-3xl) 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--background);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 24px var(--shadow);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
  padding: var(--spacing-3xl) 0;
  background: var(--surface);
}

.steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl);
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.step-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.step-content img {
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px var(--shadow);
}

.code-sample {
  background: #1e293b;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  overflow-x: auto;
}

.code-header {
  background: #334155;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
  color: #94a3b8;
  font-family: var(--font-mono);
}

.code-sample pre {
  margin: 0;
}

.code-sample code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: #e2e8f0;
}

/* API Section */
.api-section {
  padding: var(--spacing-3xl) 0;
}

.api-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.api-text h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

.api-text p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.api-features {
  list-style: none;
  margin-bottom: var(--spacing-2xl);
}

.api-features li {
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
  font-size: 1rem;
}

.api-code .code-sample {
  max-width: 600px;
}

/* Pricing Section */
.pricing {
  padding: var(--spacing-3xl) 0;
  background: var(--surface);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.pricing-card {
  background: var(--background);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  border: 2px solid var(--border);
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  border-color: var(--primary);
  box-shadow: 0 12px 32px var(--shadow);
  transform: translateY(-4px);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.2);
}

.badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
}

.pricing-header h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--spacing-xs);
}

.price .amount {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
}

.price .period {
  font-size: 1rem;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--spacing-2xl);
}

.pricing-features li {
  padding: var(--spacing-md) 0;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.pricing-features li:last-child {
  border-bottom: none;
}

/* CTA Section */
.cta {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(
    135deg,
    var(--primary) 0%,
    var(--primary-dark) 100%
  );
  color: white;
  text-align: center;
}

.cta h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.cta p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

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

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

.cta .btn-secondary {
  border-color: white;
  color: white;
}

.cta .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
}

.footer-section p {
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

/* 404 Error Page */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl) 0;
}

.error-content {
  text-align: center;
  max-width: 600px;
}

.error-code {
  font-size: 8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: var(--spacing-lg);
}

.error-content h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.error-content p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
}

.error-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-2xl);
}

.helpful-links {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--border);
}

.helpful-links h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.helpful-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.helpful-links a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

.helpful-links a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

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

  .mobile-menu-toggle {
    display: flex;
  }

  .hero .container {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

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

  .hero-stats {
    justify-content: space-around;
  }

  .section-header h2 {
    font-size: 1.75rem;
  }

  .api-content {
    grid-template-columns: 1fr;
  }

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

  .step-number {
    margin: 0 auto;
  }

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

  .cta h2 {
    font-size: 1.75rem;
  }

  .cta-buttons {
    flex-direction: column;
    max-width: 300px;
    margin: 0 auto;
  }

  .error-actions {
    flex-direction: column;
    max-width: 300px;
    margin: 0 auto var(--spacing-2xl);
  }

  .error-code {
    font-size: 5rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.5rem;
  }

  .logo span {
    display: none;
  }

  .code-sample {
    font-size: 0.75rem;
  }
}