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

:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #1a1d23;
  --text-secondary: #5a5f6b;
  --text-muted: #8b8f99;
  --primary: #1a56db;
  --primary-hover: #1648b8;
  --primary-light: #e8eefb;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
  --max-w: 1080px;
}

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 56px;
}
.nav-logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.logo-icon {
  color: var(--primary);
  font-size: 1.1rem;
}
.nav-cta {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  padding: 0.45rem 1rem;
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  transition: background 0.15s, color 0.15s;
}
.nav-cta:hover {
  background: var(--primary);
  color: #fff;
}

/* Hero */
.hero {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
}
.hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.accent {
  color: var(--primary);
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 2rem;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow);
}
.btn-outline {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}
.btn-outline:hover {
  border-color: #ccc;
  background: #fafafa;
}
.btn-lg {
  padding: 0.8rem 2rem;
  font-size: 1rem;
}

/* Trust bar */
.trust-bar {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.trust-bar-inner {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  padding: 1rem 0;
  flex-wrap: wrap;
}
.trust-item {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.trust-item strong {
  color: var(--text);
}

/* Section title */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2.5rem;
  letter-spacing: -0.01em;
}

/* Features */
.features {
  padding: 4rem 0;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.feature-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: #d0d4da;
}
.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  line-height: 1;
}
.feature-card h3 {
  font-size: 0.95rem;
  font-weight: 650;
  margin-bottom: 0.5rem;
}
.feature-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* How it works */
.how {
  padding: 4rem 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 1.5rem;
}
.step {
  text-align: center;
  flex: 0 1 220px;
}
.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
}
.step h3 {
  font-size: 0.95rem;
  font-weight: 650;
  margin-bottom: 0.35rem;
}
.step p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.step-arrow {
  font-size: 1.3rem;
  color: var(--text-muted);
  padding-top: 0.6rem;
  flex-shrink: 0;
}

/* Audience */
.audience {
  padding: 4rem 0;
}
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.audience-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.audience-card h3 {
  font-size: 0.95rem;
  font-weight: 650;
  margin-bottom: 0.5rem;
}
.audience-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* CTA */
.cta-section {
  padding: 4rem 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.cta-inner {
  text-align: center;
}
.cta-inner h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.cta-inner p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

/* Footer */
.footer {
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-note {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero {
    padding: 3rem 0 2.5rem;
  }
  .hero h1 {
    font-size: 1.65rem;
  }
  .hero-sub {
    font-size: 1rem;
  }
  .features-grid,
  .audience-grid {
    grid-template-columns: 1fr;
  }
  .steps {
    flex-direction: column;
    align-items: center;
  }
  .step-arrow {
    transform: rotate(90deg);
    padding: 0;
  }
  .trust-bar-inner {
    gap: 1.25rem;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.4rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-lg {
    width: 100%;
  }
  .nav-inner {
    height: 48px;
  }
  .nav-logo {
    font-size: 0.95rem;
  }
  .nav-cta {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
}