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

:root {
  /* Color Palette */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #f8fafc;
  --accent-color: #06b6d4;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --background: #ffffff;
  --surface: #f8fafc;
  --border: #e2e8f0;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.15);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--background);
  overflow-x: hidden;
}

/* Universal Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
  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: 1000;
  transition: all 0.3s ease;
}

/* CSS-only navbar scroll effect (limited browser support) */
@supports (animation-timeline: scroll()) {
  .navbar {
    animation: navbar-scroll both linear;
    animation-timeline: scroll();
    animation-range: 0px 50px;
  }
  
  @keyframes navbar-scroll {
    from {
      background: rgba(255, 255, 255, 0.95);
      box-shadow: none;
    }
    to {
      background: rgba(255, 255, 255, 0.98);
      box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    }
  }
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.3s ease;
}

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

.btn-login {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.btn-login:hover {
  background: var(--primary-color);
  color: white !important;
  border-color: var(--primary-color);
}

/* Hero Section */
.hero {
  padding: 120px 0 var(--spacing-3xl);
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: radial-gradient(ellipse at center top, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

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

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.hero-accent {
  color: var(--primary-color);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-2xl);
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-lg);
  transition: all 0.3s ease;
  border: 2px solid transparent;
  cursor: pointer;
  width: fit-content;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-large);
}

.btn-primary:active, .btn-secondary:active {
  transform: scale(0.98);
}

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

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

.cta-note {
  color: var(--text-light);
  font-size: var(--font-size-sm);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 400px;
}

.photo-grid {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  transform: rotate(5deg);
}

.photo-card {
  background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-large);
  position: relative;
  overflow: hidden;
}

.photo-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, rgba(99, 102, 241, 0.1), rgba(6, 182, 212, 0.1));
}





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



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

.section-header h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  padding: var(--spacing-2xl);
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-light);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-large);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  color: white;
}

.feature-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

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

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



.pricing-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  max-width: 800px;
  margin: 0 auto;
}

.pricing-card {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-medium);
  border: 2px solid var(--border);
  position: relative;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.pricing-card:not(.pricing-featured):hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.pricing-featured {
  border-color: var(--primary-color);
  transform: scale(1.05);
  box-shadow: var(--shadow-large);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 0.5rem var(--spacing-lg);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.pricing-header h3 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

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

.price-amount {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--primary-color);
}

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

.pricing-features {
  margin-bottom: var(--spacing-xl);
}

.pricing-features ul {
  list-style: none;
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: var(--spacing-lg);
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

.pricing-card .btn-primary,
.pricing-card .btn-secondary {
  margin-top: auto;
  align-self: center;
}

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



.cta h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

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

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

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

/* Footer */
.footer {
  padding: var(--spacing-2xl) 0;
  background: var(--text-primary);
  color: white;
}



.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xs);
}

.footer-brand p {
  color: var(--text-light);
}

.footer-links {
  display: flex;
  gap: var(--spacing-xl);
}

.footer-links a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

/* Responsive Design - Tablet and Mobile */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .nav-links {
    gap: var(--spacing-md);
  }

  .nav-links a {
    font-size: var(--font-size-sm);
  }

  .hero {
    padding: 100px 0 var(--spacing-2xl);
  }

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

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

  .hero-visual {
    height: 300px;
  }

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

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

  .pricing-featured {
    transform: none;
  }

  .section-header h2 {
    font-size: var(--font-size-3xl);
  }

  .footer-content {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .btn-primary, .btn-secondary {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
  }

  .feature-card {
    padding: var(--spacing-lg);
  }

  .pricing-card {
    padding: var(--spacing-lg);
  }
}

/* Smooth scrolling with padding for navbar */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

/* Focus styles for accessibility */
a:focus, button:focus, .btn-primary:focus, .btn-secondary:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.btn-primary:focus {
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.8);
}

.cta .btn-primary:focus {
  outline-color: #ffffff;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.3);
}