:root {
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --accent: #1d4ed8;
  --accent-ink: #1e3a8a;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  z-index: 10;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand .mark {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  background: var(--ink);
  color: #fff;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
}
.nav a {
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 500;
  margin-left: 22px;
}
.nav a:hover { color: var(--ink); text-decoration: none; }

/* Hero */
.hero {
  padding: 88px 0 64px;
  border-bottom: 1px solid var(--line);
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  max-width: 800px;
}
.hero p.lead {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--ink-soft);
  max-width: 680px;
  margin: 0 0 32px;
}
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); text-decoration: none; }
.btn-ghost { color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--bg-alt); text-decoration: none; }

/* Sections */
section { padding: 64px 0; }
section.alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 12px;
}
section h2 {
  font-size: clamp(24px, 3.5vw, 34px);
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  max-width: 760px;
}
section p.body {
  color: var(--ink-soft);
  max-width: 720px;
  font-size: 17px;
  margin: 0 0 16px;
}

/* Flat rectilinear feature rows (no card clusters) */
.rows { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--bg); margin-top: 28px; }
.row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 24px 28px;
  border-bottom: 1px solid var(--line);
}
.row:last-child { border-bottom: 0; }
.row .k { font-weight: 600; color: var(--ink); }
.row .v { color: var(--ink-soft); }
@media (max-width: 640px) {
  .row { grid-template-columns: 1fr; gap: 6px; }
}

/* Steps */
.steps { counter-reset: step; margin-top: 28px; border-top: 1px solid var(--line); }
.step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.step .n {
  counter-increment: step;
  font-weight: 800;
  color: var(--accent);
  font-size: 18px;
}
.step .n::before { content: counter(step); }
.step h3 { margin: 0 0 4px; font-size: 18px; }
.step p { margin: 0; color: var(--ink-soft); }

/* Compliance note */
.notice {
  margin-top: 28px;
  padding: 18px 22px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  color: var(--ink-soft);
  font-size: 15px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: #cbd5e1;
  padding: 48px 0 36px;
  font-size: 14px;
}
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-grid h4 { color: #fff; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; margin: 0 0 12px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 8px; }
.disclaimer {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  color: #94a3b8;
  font-size: 13px;
  line-height: 1.7;
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}

/* Legal page typography */
.legal { padding: 56px 0 72px; }
.legal h1 { font-size: 34px; letter-spacing: -0.01em; margin: 0 0 8px; }
.legal .updated { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
.legal h2 { font-size: 20px; margin: 32px 0 10px; }
.legal p, .legal li { color: var(--ink-soft); max-width: 760px; }
.legal .back { display: inline-block; margin-bottom: 24px; font-size: 14px; }

/* needs-input marker (remove before publishing) */
.todo { background: #fef3c7; color: #92400e; padding: 0 4px; border-radius: 3px; font-weight: 600; }