:root {
  --paper: #f5f0e7;
  --paper-deep: #e8dfd2;
  --ink: #191614;
  --muted: #6a625c;
  --line: rgba(25, 22, 20, 0.18);
  --line-strong: rgba(25, 22, 20, 0.4);
  --accent: #7b2f22;
  --accent-soft: rgba(123, 47, 34, 0.12);
  --shadow: 0 24px 80px rgba(34, 26, 22, 0.08);
  --mono: "Victor Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 17px;
}

body.korpus-body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(123, 47, 34, 0.12), transparent 38%),
    linear-gradient(180deg, #fbf7f0 0%, var(--paper) 48%, var(--paper-deep) 100%);
  font-family: var(--sans);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration-color: rgba(123, 47, 34, 0.35);
  text-underline-offset: 0.18em;
  transition: color 180ms ease, text-decoration-color 180ms ease, opacity 180ms ease;
}

a:hover {
  color: var(--accent);
  text-decoration-color: rgba(123, 47, 34, 0.75);
}

.korpus-shell {
  width: min(calc(100% - 2.5rem), var(--max));
  margin: 0 auto;
  padding: 1.4rem 0 4rem;
}

.korpus-topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 0.9rem 0 1.2rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.84rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.korpus-topbar a {
  text-decoration: none;
}

.korpus-mark {
  font-family: var(--mono);
}

.korpus-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.85fr);
  gap: 3rem;
  padding: 4rem 0 3rem;
}

.korpus-hero h1,
.korpus-article h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3rem, 7vw, 6rem);
  line-height: 0.94;
  letter-spacing: -0.04em;
  font-weight: 600;
}

.korpus-hero p,
.lede {
  max-width: 42rem;
  font-size: 1.08rem;
  color: rgba(25, 22, 20, 0.82);
}

.korpus-kicker,
.section-kicker,
.note-meta,
.realm-tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-note {
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
}

.korpus-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.9fr);
  gap: 2.4rem;
  align-items: start;
}

.korpus-section {
  padding: 1.3rem 0 1.6rem;
  border-top: 1px solid var(--line);
}

.korpus-section h2,
.korpus-note-section h2 {
  margin: 0 0 0.8rem;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2vw, 2rem);
  line-height: 1.05;
  font-weight: 600;
}

.realm-list,
.feature-list,
.plain-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.realm-list li,
.feature-list li,
.plain-list li {
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
}

.realm-list li:first-child,
.feature-list li:first-child,
.plain-list li:first-child {
  border-top: 0;
}

.realm-link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  text-decoration: none;
}

.realm-link strong,
.feature-list strong {
  display: block;
  margin-bottom: 0.15rem;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
}

.realm-link span,
.feature-list span,
.plain-list span {
  color: var(--muted);
}

.realm-link em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.covenant {
  padding: 1.4rem 1.5rem;
  background: rgba(255, 255, 255, 0.44);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.split-note {
  display: grid;
  grid-template-columns: minmax(220px, 0.38fr) minmax(0, 1fr);
  gap: 2.2rem;
  padding: 3.2rem 0 4.5rem;
}

.note-rail {
  position: sticky;
  top: 1.2rem;
  align-self: start;
}

.rail-block {
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
  margin-top: 1rem;
}

.rail-block:first-child {
  margin-top: 0;
}

.rail-block strong {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.rail-block p,
.rail-block li {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.korpus-article {
  min-width: 0;
}

.korpus-article header {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2rem;
}

.korpus-article h2 {
  margin-top: 2rem;
}

.korpus-article p,
.korpus-article li {
  max-width: 44rem;
}

.korpus-article ul,
.korpus-article ol {
  padding-left: 1.2rem;
}

.callout {
  margin: 1.4rem 0;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

.rail-nav a {
  display: block;
  padding: 0.2rem 0;
  text-decoration: none;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-decoration: none;
}

.page-footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .korpus-hero,
  .korpus-grid,
  .split-note {
    grid-template-columns: 1fr;
  }

  .note-rail {
    position: static;
  }

  .korpus-hero {
    gap: 1.8rem;
    padding-top: 2.5rem;
  }
}