/* GuardRail Marketing Site - Stripe/Linear/Xero inspired */
:root {
  --bg: #0a0a0b;
  --bg-elevated: #141416;
  --bg-card: #1a1a1d;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --accent: #22c55e;
  --accent-hover: #16a34a;
  --accent-subtle: rgba(34, 197, 94, 0.12);
  --border: #27272a;
  --radius: 12px;
  --radius-lg: 16px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 3.75rem); line-height: 1.15; }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }

p {
  color: var(--text-muted);
  font-size: 1.0625rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

/* Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-heading {
  text-align: center;
  margin-bottom: 60px;
}

.section-heading h2 {
  margin-bottom: 16px;
}

.section-heading p {
  max-width: 520px;
  margin: 0 auto;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: background var(--transition);
}

.nav.scrolled { background: rgba(10, 10, 11, 0.9); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.nav-links a:hover { color: var(--text); }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.nav-toggle-text {
  display: none;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-left: 10px;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(34, 197, 94, 0.35);
  transform: translateY(-1px);
}

.nav-toggle .bar {
  display: none;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  margin: 3px 0;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

@media (max-width: 900px) {
  .nav-inner {
    gap: 12px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    width: auto;
    padding: 0 12px;
    gap: 8px;
  }

  .nav-toggle-text {
    display: inline;
  }

  .nav.menu-open .nav-links {
    display: flex;
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    padding: 14px 14px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    background: rgba(20, 20, 22, 0.98);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.45);
  }

  .nav.menu-open .nav-links a {
    width: 100%;
    padding: 10px 10px;
    border-radius: 10px;
  }

  .nav.menu-open .nav-links a:hover {
    background: rgba(34, 197, 94, 0.08);
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: inherit;
}

.btn-ghost { color: var(--text-muted); background: transparent; }
.btn-ghost:hover { color: var(--text); }

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

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

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 140px 0 100px;
}

.hero-content {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero h1 {
  margin-bottom: 24px;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* What it does */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color var(--transition);
  text-align: center;
}

.feature-card:hover { border-color: rgba(34, 197, 94, 0.3); }

.feature-card h3 { margin-bottom: 12px; color: var(--accent); }
.feature-card p { font-size: 0.9375rem; }
.feature-card p.feature-reinforce { font-size: 0.8125rem; margin-top: 12px; margin-bottom: 0; color: var(--text); }

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

@media (max-width: 768px) {
  .steps { grid-template-columns: 1fr; }
}

.step {
  text-align: center;
}

.step-num {
  width: 48px;
  height: 48px;
  background: var(--accent-subtle);
  color: var(--accent);
  font-weight: 600;
  font-size: 1.125rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.step h3 { margin-bottom: 8px; }
.step p { font-size: 0.9375rem; }

/* Client vs Vendor */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 768px) {
  .split-section { grid-template-columns: 1fr; }
}

.split-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.split-card h3 {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.split-section-left .split-card { text-align: left; }
.split-section-left .split-card h3 { justify-content: flex-start; }
.split-section-left .split-card li { justify-content: flex-start; }

.split-card .icon { color: var(--accent); font-size: 1.5rem; }

.split-card ul {
  list-style: none;
  margin-top: 20px;
}

.split-card li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.split-card li:last-child { border-bottom: none; }

.split-card li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
}

/* Pricing summary */
.pricing-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

@media (max-width: 900px) {
  .pricing-summary { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
  .pricing-summary { grid-template-columns: 1fr; }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
}

.pricing-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.pricing-card h4 { margin-bottom: 4px; font-size: 1rem; }
.pricing-card .price { font-size: 1.5rem; font-weight: 600; margin-bottom: 8px; }
.pricing-card .price span { font-size: 0.875rem; font-weight: 400; color: var(--text-muted); }
.pricing-card p { font-size: 0.8125rem; margin-bottom: 16px; }

/* Security badges */
.security-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
  margin-top: 48px;
}

.security-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.security-badge span { font-weight: 500; font-size: 0.9375rem; }

/* Final CTA */
.cta-section {
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg) 100%);
  text-align: center;
}

.cta-section h2 { margin-bottom: 16px; }
.cta-section p { margin-bottom: 32px; }

/* Footer */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--text-muted); font-size: 0.875rem; }
.footer-links a:hover { color: var(--text); }

/* Page layouts (Pricing, Security) */
.page-header {
  padding: 140px 0 80px;
  text-align: center;
}

.page-header h1 { margin-bottom: 16px; }
.page-header p { max-width: 560px; margin: 0 auto; font-size: 1.125rem; }

/* Pricing page */
.pricing-plans {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin: 60px 0;
}

@media (max-width: 768px) {
  .pricing-plans { grid-template-columns: 1fr; }
}

.pricing-plan {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.pricing-plan.featured {
  border-color: var(--accent);
  position: relative;
}

.pricing-plan.featured::before {
  content: "Most popular";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--bg);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}

.pricing-plan h2 { margin-bottom: 8px; }
.pricing-plan .desc { margin-bottom: 24px; font-size: 0.9375rem; }
.pricing-plan .plan-price { font-size: 2rem; font-weight: 600; margin-bottom: 24px; }
.pricing-plan .plan-price span { font-size: 1rem; font-weight: 400; color: var(--text-muted); }

.plan-features { list-style: none; }
.plan-features li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.plan-features li:last-child { border-bottom: none; }
.plan-features li::before { content: "✓"; color: var(--accent); font-weight: 700; }

.pricing-plan .btn { width: 100%; margin-top: 24px; }

/* Security page */
.security-content {
  max-width: 720px;
  margin: 0 auto;
}

.security-content h2 { margin: 48px 0 16px; }
.security-content h2:first-of-type { margin-top: 0; }
.security-content p { margin-bottom: 16px; }
.security-content ul { margin: 16px 0 24px 24px; color: var(--text-muted); }
.security-content li { margin-bottom: 8px; }

/* Governance */
.governance-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 40px;
}

@media (max-width: 960px) {
  .governance-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .governance-grid {
    grid-template-columns: 1fr;
  }
}

.gov-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.gov-card h3 {
  font-size: 1rem;
  margin-bottom: 2px;
}

.gov-card p {
  font-size: 0.875rem;
}

.gov-link {
  font-size: 0.8125rem;
  color: var(--accent);
  margin-top: 8px;
}

.gov-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  border-color: rgba(34, 197, 94, 0.4);
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.06), var(--bg-card));
}