/* Simple Black & White CSS */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: #000;
  background-color: #fff;
}

/* Header */
.header {
  background: #fff;
  border-bottom: 1px solid #eee;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 1.25rem;
  color: #000;
}

.logo-icon {
  color: #000;
}

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

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: #666;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: #000;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid transparent;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  outline: none;
  background: transparent;
}

.btn-primary {
  background-color: #000;
  color: #fff;
  border-color: #000;
}

.btn-primary:hover {
  background-color: #333;
  border-color: #333;
}

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

.btn-full {
  width: 100%;
}

/* Hero Section */
.hero {
  padding: 6rem 0;
  text-align: center;
}

.hero-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero-title {
  font-size: 3.75rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero-title-gradient {
  background: linear-gradient(135deg, #2563eb 0%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: #666;
  margin-bottom: 2.5rem;
  line-height: 1.5;
}

/* Features Section */
.features {
  padding: 6rem 0;
  background-color: #f9f9f9;
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-title {
  text-align: center;
  font-size: 1.875rem;
  font-weight: 500;
  margin-bottom: 4rem;
  color: #000;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: #fff;
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid #eee;
  transition: all 0.2s ease;
}

.feature-card:hover {
  border-color: #ccc;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background-color: #f5f5f5;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: #000;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: #000;
}

.feature-description {
  color: #666;
  line-height: 1.6;
}

/* How it Works */
.how-it-works {
  padding: 6rem 0;
}

.how-it-works-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.steps {
  display: grid;
  gap: 3rem;
}

.step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.step-number {
  width: 48px;
  height: 48px;
  background-color: #000;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: #000;
}

.step-description {
  color: #666;
  line-height: 1.6;
}

/* CTA Section */
.cta {
  padding: 6rem 0;
  background-color: #f9f9f9;
  text-align: center;
}

.cta-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.cta-title {
  font-size: 2.25rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: #000;
}

.cta-subtitle {
  font-size: 1.25rem;
  color: #666;
  margin-bottom: 2.5rem;
  line-height: 1.5;
}

/* Footer */
.footer {
  background-color: #fff;
  border-top: 1px solid #eee;
  padding: 4rem 0 2rem 0;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-section {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-logo-text {
  font-weight: 600;
  font-size: 1.125rem;
  color: #000;
}

.footer-description {
  color: #666;
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-column-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: #000;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-link {
  display: block;
  color: #666;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #000;
}

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

.footer-copyright {
  color: #999;
  font-size: 0.875rem;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
  position: relative;
  background-color: #fff;
  border-radius: 1.5rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  width: 100%;
  overflow: hidden;
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid #eee;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #000;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #999;
  transition: all 0.2s ease;
}

.modal-close:hover {
  background-color: #f5f5f5;
  color: #666;
}

.modal-body {
  padding: 1.5rem;
}

.modal-description {
  color: #666;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

/* Utility classes */
.hidden { 
  display: none !important; 
}

/* Responsive design */
@media (max-width: 768px) {
  .header-container {
    padding: 0 1rem;
  }
  
  .hero {
    padding: 4rem 0;
  }
  
  .hero-container {
    padding: 0 1rem;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .features-container,
  .how-it-works-container,
  .cta-container,
  .footer-container {
    padding: 0 1rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .nav {
    gap: 1rem;
  }
  
  .nav-link {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.875rem;
  }
  
  .hero-subtitle {
    font-size: 1.125rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .cta-title {
    font-size: 1.875rem;
  }
}