:root {
  --ink: #1a1d24;
  --ink-soft: #4a505c;
  --paper: #f3f1ec;
  --panel: #ffffff;
  --panel-edge: #dcd7cc;
  --steel-900: #093b59;
  --steel-700: #1f5a7d;
  --steel-soft: #e7edf1;
  --accent: #b5652d;
  --accent-strong: #8f4c1f;
  --accent-soft: #ecd9c7;
  --ok: #3f7a55;
  --ok-soft: #dde8e0;
  --rule: #d8d2c4;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: 'Big Shoulders Display', 'Arial Narrow', sans-serif;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  color: var(--steel-900);
  text-wrap: balance;
  margin: 0;
}

.mono { font-family: 'IBM Plex Mono', ui-monospace, monospace; }

a { color: var(--accent-strong); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 1.5rem; }

/* ---------- Nav ---------- */
header.site {
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 0.9rem 0;
  gap: 0.7rem 1rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}
.brand img { height: 28px; }
.brand span {
  font-family: 'Big Shoulders Display', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--steel-900);
}
.nav-links { display: flex; align-items: center; gap: 1.3rem; }
.nav-links a.page-link {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.94rem;
}
.nav-links a.page-link:hover { color: var(--steel-900); }
.nav a.cta {
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  padding: 0.55rem 1.1rem;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
}
.nav a.cta:hover { background: var(--accent-strong); }
.nav-right { display: flex; align-items: center; gap: 1.1rem; }
.lang-switch { display: flex; gap: 0.4rem; font-family: 'IBM Plex Mono', monospace; font-size: 0.82rem; }
.lang-switch a { color: var(--ink-soft); text-decoration: none; padding: 0.2rem 0.35rem; border-radius: 3px; }
.lang-switch a.active { color: var(--steel-900); font-weight: 600; }
.lang-switch a:not(.active):hover { background: var(--steel-soft); color: var(--steel-900); }
.lang-switch .sep { color: var(--rule); }

/* ---------- Hero ---------- */
.hero {
  padding: 4.5rem 0 3.5rem;
  background: linear-gradient(180deg, var(--steel-soft), var(--paper) 70%);
  border-bottom: 1px solid var(--rule);
}
.hero.compact { padding: 3rem 0 2.6rem; }
.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin: 0 0 0.8rem;
}
.hero h1 { font-size: clamp(2.1rem, 5vw, 3.3rem); line-height: 1.02; max-width: 16ch; }
.hero p.dek {
  max-width: 56ch;
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin: 1.1rem 0 1.8rem;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.9rem; }
.btn {
  display: inline-block;
  padding: 0.85rem 1.5rem;
  border-radius: 5px;
  font-weight: 600;
  text-decoration: none;
  font-size: 1rem;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-strong); }
.btn.ghost { background: transparent; border: 1.5px solid var(--steel-900); color: var(--steel-900); }
.btn.ghost:hover { background: var(--steel-soft); }

/* ---------- Genealogy chain ---------- */
.chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2.6rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.86rem;
}
.chain .node {
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 4px;
  padding: 0.55rem 0.95rem;
  box-shadow: 0 1px 2px rgba(9,59,89,0.06), 0 8px 20px -14px rgba(9,59,89,0.3);
}
.chain .node b { color: var(--steel-900); }
.chain .arrow { color: var(--steel-700); }

/* ---------- Sections ---------- */
section { padding: 3.6rem 0; }
section + section { border-top: 1px solid var(--rule); }
.section-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin-bottom: 0.5rem;
}
.section-title { font-size: clamp(1.5rem, 3.4vw, 2rem); margin-bottom: 0.6rem; }
.section-dek { max-width: 62ch; color: var(--ink-soft); margin-bottom: 2rem; }

/* ---------- Cards ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.1rem;
}
.card {
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 6px;
  padding: 1.3rem 1.4rem;
}
.card .num {
  font-family: 'Big Shoulders Display', sans-serif;
  font-weight: 700;
  color: var(--accent);
  font-size: 1.1rem;
}
.card h3 {
  font-size: 1.05rem;
  text-transform: none;
  letter-spacing: 0;
  margin: 0.35rem 0 0.4rem;
  color: var(--ink);
}
.card p { margin: 0; font-size: 0.94rem; color: var(--ink-soft); }
.card .role-tag {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--steel-700);
  background: var(--steel-soft);
  border-radius: 3px;
  padding: 0.15rem 0.45rem;
  margin-bottom: 0.55rem;
}
.card ol.steps {
  margin: 0.6rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
  display: grid;
  gap: 0.25rem;
}
.card ol.steps li::marker { color: var(--accent); font-weight: 600; }

/* ---------- Why list ---------- */
.why-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.9rem; }
.why-list li {
  padding: 0.9rem 1.1rem;
  background: var(--panel);
  border-left: 3px solid var(--accent);
  border-radius: 0 5px 5px 0;
  font-size: 0.96rem;
}
.why-list b { color: var(--steel-900); }

/* ---------- Not band ---------- */
.not-band {
  background: var(--steel-900);
  color: #fff;
}
.not-band .section-title, .not-band h2 { color: #fff; }
.not-band .section-eyebrow { color: var(--accent); }
.not-band p { color: #d7e0e6; max-width: 62ch; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--accent-soft);
  text-align: center;
}
.cta-band h2 { font-size: clamp(1.5rem, 3.6vw, 2.2rem); max-width: 20ch; margin: 0 auto 0.8rem; }
.cta-band p { max-width: 50ch; margin: 0 auto 1.6rem; color: var(--ink-soft); }

footer {
  padding: 2.2rem 0 3rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem; align-items: center; }
footer a { color: var(--ink-soft); }

/* ---------- Flow diagram (manual) — vertical stepper ---------- */
.stepper { position: relative; margin: 1.4rem 0 0; padding-left: 3.4rem; }
.stepper::before {
  content: "";
  position: absolute;
  left: 1.15rem;
  top: 0.4rem;
  bottom: 2.2rem;
  width: 2px;
  background: var(--panel-edge);
}
.stepper-step { position: relative; padding-bottom: 2rem; }
.stepper-step:last-child { padding-bottom: 0; }
.stepper-num {
  position: absolute;
  left: -3.4rem;
  top: 0;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 50%;
  background: var(--panel);
  border: 2px solid var(--accent);
  color: var(--accent-strong);
  font-family: 'Big Shoulders Display', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.stepper-step.alert .stepper-num { border-color: var(--steel-700); color: var(--steel-700); background: var(--steel-soft); }
.stepper-step h3 { font-size: 1.05rem; text-transform: none; letter-spacing: 0; color: var(--ink); margin-bottom: 0.3rem; }
.stepper-step p { margin: 0; font-size: 0.94rem; color: var(--ink-soft); max-width: 58ch; }
.stepper-step .tag {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-radius: 3px;
  padding: 0.15rem 0.45rem;
  margin-left: 0.5rem;
}

/* ---------- Manual TOC ---------- */
.toc { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1.4rem 0 0; }
.toc a {
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--steel-900);
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 20px;
  padding: 0.4rem 0.9rem;
}
.toc a:hover { border-color: var(--accent); color: var(--accent-strong); }

@media (max-width: 640px) {
  .hero-ctas { flex-direction: column; }
  .btn { text-align: center; }
  .nav { justify-content: center; text-align: center; }
  .nav-right { order: 2; }
  .nav-links { order: 3; width: 100%; justify-content: center; }
}