:root {
  --bg: #ffffff;
  --ink: #111111;
  --muted: #5d5d5d;
  --soft: #f7f7f5;
  --line: #e7e7e2;
  --accent: #23313f;
  --max: 1120px;
  --radius: 22px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.site-header {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { font-size: 0.95rem; letter-spacing: 0.04em; font-weight: 700; }

.nav { display: flex; gap: 22px; color: var(--muted); font-size: 0.9rem; }
.nav a:hover { color: var(--ink); }

.section-wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; padding: 76px 0; }
.narrow { max-width: 780px; }

.hero { min-height: 66vh; display: flex; flex-direction: column; justify-content: center; padding-top: 56px; }
.eyebrow, .section-kicker { color: var(--muted); font-size: 0.78rem; font-weight: 650; letter-spacing: 0.08em; text-transform: uppercase; }

h1, h2, h3, p { margin-top: 0; }

h1 {
  max-width: 920px;
  margin-bottom: 24px;
  font-size: clamp(2.75rem, 7vw, 6.4rem);
  line-height: 0.94;
  letter-spacing: -0.06em;
  font-weight: 720;
}

h2 {
  max-width: 740px;
  margin: 10px 0 18px;
  font-size: clamp(1.9rem, 4vw, 3.8rem);
  line-height: 1;
  letter-spacing: -0.05em;
  font-weight: 700;
}

h3 { margin-bottom: 12px; font-size: 1.3rem; letter-spacing: -0.03em; }
.hero-copy { max-width: 690px; color: var(--muted); font-size: clamp(1.1rem, 2vw, 1.35rem); }
.section-intro p { max-width: 640px; color: var(--muted); font-size: 1.05rem; }

.premise p { font-size: clamp(1.25rem, 2.2vw, 1.75rem); letter-spacing: -0.03em; line-height: 1.35; }

.actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 12px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--ink);
  font-size: 0.92rem;
  font-weight: 600;
}

.button.primary { background: var(--ink); color: var(--bg); }
.button.secondary { background: var(--bg); border-color: var(--line); }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 28px; }
.card { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); }
.card-index { display: inline-block; margin-bottom: 14px; font-size: 0.78rem; font-weight: 650; color: var(--muted); letter-spacing: 0.08em; }
.card p { color: var(--muted); margin-bottom: 0; }

.layer-stack { margin-top: 28px; border-top: 1px solid var(--line); }
.layer { display: flex; justify-content: space-between; align-items: baseline; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.layer strong { display: block; font-size: 1.05rem; }
.layer span { color: var(--muted); font-size: 0.95rem; }
.layer-tag { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); }

.split-panel { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: start; }
.split-panel p { color: var(--muted); }
.quiet-list div { padding: 18px 0; border-bottom: 1px solid var(--line); }
.quiet-list div:first-child { padding-top: 0; }
.quiet-list strong, .quiet-list span { display: block; }
.quiet-list span { color: var(--muted); margin-top: 4px; }
.quiet-list a { text-decoration: underline; text-underline-offset: 3px; }

.final-cta {
  margin-bottom: 40px;
  padding: 64px;
  border-radius: calc(var(--radius) + 10px);
  background: var(--soft);
}
.final-cta p { max-width: 600px; color: var(--muted); font-size: 1.05rem; }

.site-footer {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 34px 0 50px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: 0.9rem;
}

@media (max-width: 820px) {
  .site-header { flex-direction: column; align-items: flex-start; }
  .nav { flex-wrap: wrap; gap: 14px; }
  .section-wrap { padding: 48px 0; }
  .card-grid, .split-panel { grid-template-columns: 1fr; }
  .layer { flex-direction: column; }
  .final-cta { padding: 36px 24px; }
  .site-footer { flex-direction: column; }
}