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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-600: #4b5563;
  --gray-900: #111827;
}

body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color: var(--gray-900); line-height: 1.6; }

.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

/* Nav */
.nav {
  background: white; border-bottom: 1px solid var(--gray-200);
  padding: 14px 0; position: sticky; top: 0; z-index: 10;
}
.nav-inner {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 1000px; margin: 0 auto; padding: 0 20px;
}
.nav-brand { font-weight: 800; font-size: 20px; color: var(--primary); }

/* Buttons */
.btn {
  display: inline-block; padding: 12px 24px; border-radius: 10px;
  font-weight: 700; text-decoration: none; transition: all 0.15s;
  cursor: pointer; border: none; text-align: center;
}
.btn-nav { background: var(--primary); color: white; padding: 10px 20px; font-size: 15px; }
.btn-nav:hover { background: var(--primary-dark); }
.btn-hero {
  background: var(--primary); color: white; font-size: 18px;
  padding: 18px 36px; display: inline-block; border-radius: 12px;
}
.btn-hero:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(37,99,235,0.4); }
.btn-hero-white {
  background: white; color: var(--primary); font-size: 18px;
  padding: 18px 36px; display: inline-block; border-radius: 12px; font-weight: 700;
}
.btn-hero-white:hover { background: var(--gray-50); transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: white; font-size: 16px; width: 100%; display: block; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline {
  background: white; color: var(--primary); border: 2px solid var(--primary);
  font-size: 16px; width: 100%; display: block;
}
.btn-outline:hover { background: var(--gray-50); }

/* Hero */
.hero { background: white; padding: 80px 0 70px; text-align: center; }
.hero-badge {
  display: inline-block; background: #dbeafe; color: var(--primary);
  font-size: 14px; font-weight: 600; padding: 6px 16px; border-radius: 20px; margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 52px); font-weight: 900; line-height: 1.15;
  margin-bottom: 24px; letter-spacing: -0.02em;
}
.hero-sub { font-size: 20px; color: var(--gray-600); max-width: 560px; margin: 0 auto 36px; }
.hero-note { font-size: 14px; color: var(--gray-600); margin-top: 14px; }

/* Pain */
.pain { background: var(--gray-50); padding: 80px 0; }
.pain h2 { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 48px; }
.pain-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.pain-card {
  background: white; border-radius: 16px; padding: 28px;
  border: 1px solid var(--gray-200);
}
.pain-icon { font-size: 40px; margin-bottom: 14px; }
.pain-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.pain-card p { color: var(--gray-600); }

/* How it works */
.how { background: white; padding: 80px 0; }
.how h2 { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 56px; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 40px; }
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--primary); color: white;
  font-size: 22px; font-weight: 800;
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.step h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.step p { color: var(--gray-600); }

/* Testimonials */
.proof { background: var(--gray-50); padding: 80px 0; }
.proof h2 { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 48px; }
.testimonials { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.testimonial {
  background: white; border-radius: 16px; padding: 28px;
  border: 1px solid var(--gray-200);
}
.t-stars { color: #f59e0b; font-size: 20px; margin-bottom: 14px; }
.testimonial p { color: var(--gray-600); margin-bottom: 16px; font-style: italic; }
.t-author { font-size: 14px; font-weight: 600; }

/* SEO Content */
.seo-content { background: white; padding: 80px 0; }
.seo-content h2 { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 48px; }
.seo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 40px; }
.seo-block h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.seo-block p { color: var(--gray-600); }

/* Pricing */
.pricing { background: var(--gray-50); padding: 80px 0; text-align: center; }
.pricing h2 { font-size: 36px; font-weight: 800; margin-bottom: 12px; }
.pricing-sub { font-size: 18px; color: var(--gray-600); margin-bottom: 48px; }
.pricing-cards { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.pricing-card {
  background: white; border-radius: 20px; padding: 36px;
  min-width: 280px; border: 2px solid var(--gray-200); position: relative;
}
.pricing-featured { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37,99,235,0.1); }
.pricing-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: white; font-size: 13px; font-weight: 700;
  padding: 4px 16px; border-radius: 20px; white-space: nowrap;
}
.pricing-tier { font-size: 16px; font-weight: 600; color: var(--gray-600); margin-bottom: 8px; }
.pricing-price { font-size: 52px; font-weight: 900; margin-bottom: 6px; }
.pricing-price span { font-size: 20px; color: var(--gray-600); font-weight: 500; }
.pricing-desc { font-size: 15px; color: var(--gray-600); margin-bottom: 24px; }
.pricing-card ul { list-style: none; text-align: left; margin-bottom: 28px; }
.pricing-card li { padding: 8px 0; border-bottom: 1px solid var(--gray-100); font-size: 15px; }

/* FAQ */
.faq { background: white; padding: 80px 0; }
.faq h2 { font-size: 32px; font-weight: 800; margin-bottom: 40px; text-align: center; }
.faq-list { max-width: 680px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--gray-200); }
.faq-item summary {
  padding: 20px 0; font-size: 17px; font-weight: 600; cursor: pointer;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::after { content: '+'; font-size: 24px; color: var(--gray-600); }
.faq-item[open] summary::after { content: '-'; }
.faq-item p { color: var(--gray-600); padding-bottom: 20px; }

/* Final CTA */
.final-cta { background: var(--primary); color: white; padding: 80px 0; text-align: center; }
.final-cta h2 { font-size: 36px; font-weight: 800; margin-bottom: 12px; }
.final-cta p { font-size: 18px; margin-bottom: 36px; opacity: 0.9; }

/* Footer */
.footer { background: var(--gray-900); color: var(--gray-600); padding: 32px 0; text-align: center; }
.footer p { margin-bottom: 8px; font-size: 14px; }
.footer a { color: var(--gray-600); }

@media (max-width: 640px) {
  .hero { padding: 50px 0 40px; }
  .pain, .how, .proof, .seo-content, .pricing, .faq, .final-cta { padding: 50px 0; }
  .seo-grid { grid-template-columns: 1fr; }
  .btn-hero, .btn-hero-white { font-size: 16px; padding: 16px 28px; }
}