:root {
  --ink: #12161f;
  --ink-soft: #454b58;
  --paper: #f6f7f9;
  --card: #ffffff;
  --line: #e2e4e9;
  --accent: #1d3fd6;
  --accent-ink: #0f2699;
  --error: #b91c1c;
  --error-bg: #fef2f2;
  --warning: #92400e;
  --warning-bg: #fffbeb;
  --info-bg: #eef0f4;
  --clean: #15803d;
  --clean-bg: #f0fdf4;
  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
}

a { color: var(--accent-ink); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.wrap { max-width: 980px; margin: 0 auto; padding: 0 1.5rem; }

/* ---------- Top bar ---------- */
.topbar {
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.wordmark {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark span { color: var(--accent-ink); }
.topbar .cta-small {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.92rem;
  background: var(--ink);
  color: white;
  padding: 0.5rem 1.1rem;
  border-radius: 7px;
  text-decoration: none;
}

/* ---------- Hero ---------- */
.hero {
  padding: 3.5rem 0 3rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 0.75rem;
}
h1 {
  font-family: var(--serif);
  font-size: 2.6rem;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}
.lede {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 46ch;
}
.hero-ctas {
  margin-top: 1.75rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.cta-primary {
  display: inline-block;
  background: var(--accent);
  color: white;
  font-weight: 700;
  padding: 0.85rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1.02rem;
}
.cta-primary:hover { background: var(--accent-ink); }
.beta-note { font-size: 0.88rem; color: var(--ink-soft); margin-top: 0.9rem; max-width: 40ch; }
.beta-note a { color: var(--accent-ink); }

/* ---------- Signature: sample diagnostic panel ---------- */
.panel {
  background: var(--ink);
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: #d7dae2;
  box-shadow: 0 20px 40px -20px rgba(18, 22, 31, 0.35);
}
.panel-title {
  color: #8891a6;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}
.finding { padding: 0.55rem 0; border-top: 1px solid #2a3040; }
.finding:first-of-type { border-top: none; }
.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  margin-right: 0.4rem;
}
.badge-error { background: var(--error-bg); color: var(--error); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info { background: var(--info-bg); color: #3a4051; }
.finding .rule { color: #8891a6; }
.finding .msg { display: block; margin-top: 0.3rem; color: #e7e9ee; }
.finding .loc { display: block; margin-top: 0.15rem; color: #7d8499; }
.panel-result {
  margin-top: 0.9rem;
  padding-top: 0.75rem;
  border-top: 1px solid #2a3040;
  color: #b3b9c8;
}

/* ---------- Sections ---------- */
section { padding: 3rem 0; }
section.alt { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 {
  font-family: var(--serif);
  font-size: 1.7rem;
  margin: 0 0 1.5rem;
  letter-spacing: -0.005em;
}
.section-intro { color: var(--ink-soft); max-width: 62ch; margin: -0.75rem 0 1.75rem; }

/* How it works */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.1rem 1rem;
}
.steps li::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  background: var(--ink);
  color: white;
  font-family: var(--mono);
  font-size: 0.82rem;
  border-radius: 50%;
  margin-bottom: 0.65rem;
}
.steps p { margin: 0; font-size: 0.94rem; }

/* What it checks: risk grid */
.risk-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.risk-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.2rem 1.3rem;
}
.risk-card h3 {
  font-size: 1rem;
  margin: 0 0 0.5rem;
}
.risk-card p { margin: 0; font-size: 0.92rem; color: var(--ink-soft); }

/* Privacy / cannot-verify lists */
.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}
.check-list li {
  padding-left: 1.6rem;
  position: relative;
  font-size: 0.96rem;
}
.check-list.yes li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--clean);
  font-weight: 700;
}
.check-list.no li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--ink-soft);
  font-weight: 700;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

/* Why it matters: outcomes */
.outcomes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem;
}
.outcomes li {
  background: var(--warning-bg);
  border-left: 3px solid var(--warning);
  border-radius: 6px;
  padding: 0.7rem 0.9rem;
  font-size: 0.93rem;
}

/* FAQ */
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+";
  display: inline-block;
  width: 1.2rem;
  color: var(--accent-ink);
  font-weight: 700;
}
.faq details[open] summary::before { content: "–"; }
.faq p { margin: 0.6rem 0 0 1.2rem; color: var(--ink-soft); }

/* Final CTA */
.final-cta {
  text-align: center;
  padding: 3.5rem 0;
}
.final-cta h2 { margin-bottom: 0.5rem; }
.final-cta p { color: var(--ink-soft); margin-bottom: 1.5rem; }

footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}
footer p { margin: 0.3rem 0; }
footer nav a { color: var(--ink-soft); margin-right: 1rem; }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .risk-grid { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .outcomes { grid-template-columns: 1fr; }
  h1 { font-size: 2.1rem; }
}
@media (max-width: 520px) {
  .steps { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}