:root {
  --ink: #0f172a;
  --ink-soft: #475569;
  --ink-faint: #94a3b8;
  --paper: #ffffff;
  --paper-tint: #f8fafc;
  --line: #e2e8f0;
  --brand: #1d4ed8;
  --brand-dark: #1e3a8a;
  --brand-soft: #eff6ff;
  --good: #0f8a5f;
  --good-soft: #ecfdf5;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px -12px rgba(15, 23, 42, 0.18);
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- header ---------- */

header.site {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  z-index: 20;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink);
}

.brand:hover { text-decoration: none; }

.brand .mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.nav-links a { color: inherit; }

/* ---------- hero ---------- */

.hero {
  padding: 72px 0 56px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.15;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover { background: var(--brand-dark); }

.btn-ghost {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--ink-faint); background: var(--paper-tint); }

.btn-good {
  background: var(--good);
  color: #fff;
}
.btn-good:hover { filter: brightness(0.93); }

/* ---------- sections ---------- */

section { padding: 56px 0; }
section.tint { background: var(--paper-tint); }
section.border-top { border-top: 1px solid var(--line); }

h2.section-title {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  text-align: center;
}

p.section-sub {
  text-align: center;
  color: var(--ink-soft);
  max-width: 560px;
  margin: 0 auto 40px;
}

/* ---------- cards / grid ---------- */

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}

.card.muted {
  background: var(--paper-tint);
  box-shadow: none;
  color: var(--ink-faint);
}

.card .icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.card p {
  margin: 0 0 16px;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.card.muted .icon { background: var(--line); color: var(--ink-faint); }

.pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--good-soft);
  color: var(--good);
  margin-bottom: 10px;
}
.pill.soon {
  background: var(--line);
  color: var(--ink-faint);
}

/* ---------- steps ---------- */

.steps {
  counter-reset: step;
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.step {
  position: relative;
  padding-left: 44px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h4 { margin: 2px 0 6px; font-size: 1rem; }
.step p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- tree / sitemap ---------- */

.tree {
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.92rem;
  background: var(--ink);
  color: #e2e8f0;
  border-radius: var(--radius);
  padding: 26px 28px;
  overflow-x: auto;
  line-height: 1.7;
}

.tree .l1 { color: #93c5fd; font-weight: 700; }
.tree .l2 { color: #86efac; }
.tree .l3 { color: #fde68a; }
.tree .dim { color: #64748b; }

/* ---------- footer ---------- */

footer.site {
  border-top: 1px solid var(--line);
  padding: 32px 0;
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.88rem;
}

footer.site a { color: var(--ink-soft); font-weight: 600; }

/* ---------- responsive ---------- */

@media (max-width: 640px) {
  .nav-links { gap: 14px; font-size: 0.85rem; }
  section { padding: 40px 0; }
  .hero { padding: 48px 0 40px; }
}