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

:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --secondary: #06b6d4;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-light: #f9fafb;
  --bg-white: #ffffff;
  --border: #e5e7eb;
  --success: #10b981;
  --warning: #f59e0b;
}

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.nav {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin: 0;
}

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

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

.nav-btn {
  background: var(--primary);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s;
}

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 5rem 0;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
  line-height: 1.6;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feature-item svg {
  color: var(--secondary);
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.cta-note {
  font-size: 0.875rem;
  opacity: 0.8;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  border: 2px solid transparent;
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(79, 70, 229, 0.3);
}

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

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

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

/* Section Styles */
.section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Benefits Section */
.benefits {
  background: var(--bg-light);
}

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

.benefit-card {
  background: white;
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s, box-shadow 0.2s;
}

.benefit-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.benefit-icon {
  width: 64px;
  height: 64px;
  background: var(--primary);
  color: white;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.benefit-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.benefit-card p {
  color: var(--text-secondary);
}

/* How To Section */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
  margin-top: 3rem;
}

.step {
  text-align: center;
}

.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;
  margin: 0 auto 1.5rem;
}

.step h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.step p {
  color: var(--text-secondary);
}

/* CTA Secondary */
.cta-secondary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.cta-box {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta-box h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.cta-large-text {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.cta-description {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

/* Pricing Section */
.pricing {
  background: var(--bg-light);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.pricing-card {
  background: white;
  border-radius: 1rem;
  padding: 2.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.pricing-card-popular {
  border: 3px solid var(--primary);
  transform: scale(1.05);
}

.popular-badge {
  position: absolute;
  top: -15px;
  right: 30px;
  background: var(--primary);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: 2rem;
  font-weight: 600;
  font-size: 0.875rem;
}

.pricing-header h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.price {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 0.5rem;
}

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

.price-period {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.price-total {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.discount-badge {
  display: inline-block;
  background: var(--success);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.pricing-features {
  list-style: none;
  margin: 2rem 0;
}

.pricing-features li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

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

/* Platforms Section */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.platform-card {
  background: white;
  border: 2px solid var(--border);
  border-radius: 1rem;
  padding: 2.5rem;
  text-align: center;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s;
}

.platform-card:hover {
  border-color: var(--primary);
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(79, 70, 229, 0.2);
}

.platform-card svg {
  color: var(--primary);
  margin-bottom: 1rem;
}

.platform-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.platform-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* SEO Content Section */
.seo-content {
  background: var(--bg-white);
}

.seo-article {
  max-width: 800px;
  margin: 0 auto;
}

.seo-article h2 {
  font-size: 2rem;
  margin: 2.5rem 0 1rem;
  text-align: left;
}

.seo-article h2:first-child {
  margin-top: 0;
}

.seo-article h3 {
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
}

.seo-article p {
  margin-bottom: 1.25rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.seo-article ul,
.seo-article ol {
  margin: 1.5rem 0;
  padding-left: 2rem;
}

.seo-article li {
  margin-bottom: 0.75rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.seo-article strong {
  color: var(--text-primary);
}

/* Reviews Section */
.reviews {
  background: var(--bg-light);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.review-card {
  background: white;
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.review-rating {
  color: var(--warning);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.review-text {
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.review-author {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.review-author strong {
  color: var(--text-primary);
}

.review-author span {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Guarantee Section */
.guarantee {
  background: var(--bg-white);
}

.guarantee-box {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.guarantee-icon {
  display: inline-flex;
  margin-bottom: 2rem;
}

.guarantee-icon svg {
  color: var(--primary);
}

.guarantee-box h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

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

.guarantee-list {
  list-style: none;
  text-align: left;
  display: inline-block;
  margin-bottom: 2rem;
}

.guarantee-list li {
  padding: 0.75rem 0;
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

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

.footer .logo {
  margin-bottom: 1rem;
}

.footer .logo-text {
  color: white;
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

.footer-links h4 {
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

.footer-cta p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 1rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
}

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

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

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

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

  .benefits-grid,
  .pricing-grid,
  .platforms-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card-popular {
    transform: scale(1);
  }

  .hero-features {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .nav-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }

  .hero {
    padding: 3rem 0;
  }

  .section {
    padding: 3rem 0;
  }
}