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

:root {
  --blue: #1e40af;
  --blue-light: #3b82f6;
  --blue-pale: #eff6ff;
  --gray-900: #111827;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-400: #9ca3af;
  --gray-100: #f3f4f6;
  --white: #ffffff;
  --radius: 0.75rem;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--gray-700);
  line-height: 1.6;
  background: var(--white);
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.container-sm { max-width: 720px; margin: 0 auto; padding: 0 1.5rem; }

/* Header */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 1.4rem; font-weight: 800; color: var(--blue); text-decoration: none; letter-spacing: -0.02em; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.65rem 1.4rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.88; }
.btn-primary { background: var(--blue); color: var(--white); }
.btn-outline { border: 2px solid var(--blue); color: var(--blue); background: transparent; }

/* Hero */
.hero {
  background: var(--blue-pale);
  padding: 5rem 0 4rem;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}
.hero .subtitle {
  font-size: 1.2rem;
  color: var(--gray-600);
  max-width: 580px;
  margin: 0 auto 2rem;
}
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* How it works */
.section { padding: 4rem 0; }
.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gray-900);
  text-align: center;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}
.section-sub {
  text-align: center;
  color: var(--gray-600);
  margin-bottom: 2.5rem;
}

.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; }
.step {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.step-num {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  font-weight: 700;
  font-size: 0.85rem;
  width: 2rem; height: 2rem;
  border-radius: 50%;
  text-align: center;
  line-height: 2rem;
  margin-bottom: 0.75rem;
}
.step h3 { font-size: 1.05rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.4rem; }
.step p { font-size: 0.95rem; color: var(--gray-600); }

/* Personas */
.personas { background: var(--gray-100); }
.persona-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; }
.persona-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
}
.persona-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.persona-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--gray-900); }

/* CTA band */
.cta-band {
  background: var(--blue);
  color: var(--white);
  padding: 3.5rem 0;
  text-align: center;
}
.cta-band h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.75rem; }
.cta-band p { opacity: 0.85; margin-bottom: 1.75rem; }
.btn-white { background: var(--white); color: var(--blue); }

/* Footer */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9rem;
}
.footer a { color: var(--gray-400); text-decoration: none; }
.footer a:hover { color: var(--white); }