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

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: #0f172a;
  line-height: 1.6;
  background: #fff;
}

/* Nav */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.02em;
}

.nav-cta {
  background: #0f172a;
  color: white;
  padding: 0.6rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.nav-cta:hover {
  background: #1e293b;
}

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
  max-width: 750px;
  margin: 0 auto;
}

.badge {
  display: inline-block;
  background: #f0fdf4;
  color: #16a34a;
  padding: 0.35rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  border: 1px solid #bbf7d0;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

.highlight {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 1.2rem;
  color: #475569;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.cta-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.cta-button {
  display: inline-block;
  background: #0f172a;
  color: white;
  padding: 0.9rem 2.5rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  transition:
    background 0.2s,
    transform 0.1s;
}

.cta-button:hover {
  background: #1e293b;
  transform: translateY(-1px);
}

.cta-note {
  font-size: 0.85rem;
  color: #94a3b8;
}

/* How it works */
.how-it-works {
  padding: 5rem 2rem;
  background: #f8fafc;
}

.how-it-works h2,
.value-prop h2,
.demo h2,
.cta-section h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.step {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid #e2e8f0;
}

.step-number {
  width: 36px;
  height: 36px;
  background: #0f172a;
  color: white;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.step h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step p {
  color: #64748b;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Demo */
.demo {
  padding: 5rem 2rem;
}

.demo-box {
  max-width: 600px;
  margin: 0 auto;
  background: #f8fafc;
  border-radius: 16px;
  border: 1px solid #e2e8f0;
  padding: 2rem;
}

.demo-conversation {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.demo-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94a3b8;
  display: block;
  margin-bottom: 0.25rem;
}

.demo-user p,
.demo-agent p,
.demo-result p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
}

.demo-user p {
  color: #0f172a;
  font-style: italic;
}

.demo-agent p {
  color: #475569;
}

.demo-result {
  background: white;
  padding: 1rem 1.25rem;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
}

.demo-result p {
  color: #0f172a;
  font-weight: 500;
}

/* Value prop */
.value-prop {
  padding: 5rem 2rem;
  background: #f8fafc;
}

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.feature {
  padding: 1.5rem;
}

.feature h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.feature p {
  color: #64748b;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* CTA section */
.cta-section {
  text-align: center;
  padding: 5rem 2rem;
}

.cta-section p {
  color: #64748b;
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
footer {
  border-top: 1px solid #e2e8f0;
  padding: 2rem;
}

.footer-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-weight: 800;
  font-size: 1.1rem;
  color: #0f172a;
}

footer p {
  color: #94a3b8;
  font-size: 0.85rem;
}

/* Mobile */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  nav {
    padding: 1rem;
  }

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

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

  .footer-content {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}