:root {
  color-scheme: light;
  --bg: #f8fafc;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --green: #16a34a;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: inherit; }

.site-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: #eff6ff;
  color: var(--blue);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  text-decoration: none;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  background: var(--panel);
  color: var(--text);
}

.button.primary {
  border-color: var(--blue);
  background: var(--blue);
  color: #ffffff;
}

.button.primary:hover { background: var(--blue-dark); }

.hero {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 56px;
  align-items: center;
  padding: 54px 0 70px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid #bfdbfe;
  background: #eff6ff;
  color: #1e40af;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 800;
}

h1 {
  margin: 22px 0 18px;
  font-size: clamp(44px, 6vw, 72px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy {
  font-size: 19px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0 0 28px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.mock-window {
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid #cbd5e1;
  background: #ffffff;
}

.mock-top {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  min-height: 92px;
  padding: 20px;
  color: #ffffff;
}

.mock-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 18px;
}

.logo-chip {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #111827;
  color: #ffffff;
  font-weight: 900;
  font-size: 12px;
}

.mock-body {
  padding: 20px;
}

.stat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #e5e7eb;
  padding: 14px 0;
  color: #334155;
}

.status-pill {
  color: #15803d;
  background: #dcfce7;
  border: 1px solid #86efac;
  border-radius: 999px;
  padding: 7px 13px;
  font-weight: 800;
}

.section {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.section h2 {
  margin: 0 0 12px;
  font-size: 36px;
  letter-spacing: 0;
}

.section p {
  color: var(--muted);
  line-height: 1.7;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px;
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.06);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.card p {
  margin: 0 0 16px;
  font-size: 14px;
}

.card a {
  font-weight: 800;
  color: var(--blue);
  text-decoration: none;
}

.steps {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 30px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 18px;
}

.toc a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.toc a:hover { color: var(--blue); }

.guide-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 28px;
  box-shadow: 0 14px 46px rgba(15, 23, 42, 0.08);
}

.guide-card + .guide-card { margin-top: 18px; }

.guide-card h2 {
  margin: 0 0 12px;
  font-size: 26px;
}

.guide-card ol,
.guide-card ul {
  margin: 0;
  padding-left: 22px;
  color: #334155;
  line-height: 1.8;
}

.code {
  display: block;
  margin: 12px 0;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f1f5f9;
  color: #0f172a;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow-x: auto;
}

.note {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
  line-height: 1.6;
}

.footer {
  padding: 40px 0;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--line);
}

@media (max-width: 880px) {
  .hero,
  .steps {
    grid-template-columns: 1fr;
  }

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

  .toc {
    position: static;
  }
}

@media (max-width: 560px) {
  .site-shell {
    width: min(100% - 28px, 1120px);
  }

  .nav {
    align-items: flex-start;
    gap: 16px;
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
  }

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