:root {
  --bone: #f3efe5;
  --linen: #ddd6c8;
  --ink: #171b1f;
  --charcoal: #22272b;
  --stone: #6e6a60;
  --sage: #6f8c80;
  --moss: #39483f;
  --paper: #fbf8ef;
  --max: 1180px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bone);
  line-height: 1.65;
  overflow-x: clip;
}
a { color: inherit; text-decoration-color: color-mix(in srgb, var(--sage), transparent 30%); text-underline-offset: 0.18em; }
.progress { position: fixed; inset: 0 auto auto 0; height: 3px; background: var(--sage); z-index: 50; width: 0; }
.topbar, .reader-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.1rem clamp(1rem, 3vw, 2.5rem);
  border-bottom: 1px solid color-mix(in srgb, var(--linen), transparent 20%);
}
.brand {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
}
.home-hero {
  min-height: 88vh;
  background:
    linear-gradient(180deg, rgba(23,27,31,0.08), rgba(243,239,229,1)),
    radial-gradient(circle at 75% 30%, rgba(111,140,128,0.22), transparent 30%),
    var(--bone);
}
.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4rem, 10vw, 8rem) clamp(1rem, 4vw, 3rem) 4rem;
}
.eyebrow, .nav-label {
  color: var(--moss);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
}
h1, h2, h3 {
  line-height: 1.05;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
}
h1 {
  max-width: 920px;
  margin: 1rem 0;
  font-size: clamp(3rem, 9vw, 7.8rem);
  letter-spacing: 0;
}
.subtitle {
  max-width: 760px;
  color: var(--charcoal);
  font-size: clamp(1.25rem, 2.6vw, 2rem);
  line-height: 1.28;
}
.intro { max-width: 700px; color: var(--stone); font-size: 1.08rem; }
.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.5rem 0;
}
.status-row span, .paper-meta span {
  border: 1px solid var(--linen);
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
  color: var(--stone);
  background: rgba(251,248,239,0.55);
}
.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 2rem; }
.button, button {
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  padding: 0.8rem 1rem;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
  overflow-wrap: anywhere;
}
.button.primary { background: var(--ink); color: var(--bone); }
.home-main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4rem clamp(1rem, 4vw, 3rem);
}
.home-main h2, .review-page h2 { font-size: clamp(2rem, 4vw, 4rem); margin-bottom: 1rem; }
.cards, .decision-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--linen);
  border: 1px solid var(--linen);
  margin-top: 2rem;
}
.cards article, .decision-grid article {
  background: var(--paper);
  padding: 1.25rem;
}
.reader-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(243,239,229,0.94);
  backdrop-filter: blur(10px);
}
.menu-button { display: none; }
.reader-shell {
  display: grid;
  grid-template-columns: minmax(220px, 290px) minmax(0, 1fr);
}
.chapter-nav {
  position: sticky;
  top: 68px;
  height: calc(100vh - 68px);
  overflow: auto;
  padding: 1.25rem;
  border-right: 1px solid var(--linen);
}
.chapter-nav a {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.5rem;
  padding: 0.5rem 0;
  text-decoration: none;
  color: var(--stone);
  font-size: 0.9rem;
}
.chapter-nav a:hover { color: var(--ink); }
.paper, .review-page {
  max-width: 860px;
  padding: 4rem clamp(1.25rem, 5vw, 4rem) 6rem;
}
.paper-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }
.paper article > h1 { font-size: clamp(2.7rem, 7vw, 5.8rem); }
.paper article > h2 { margin-top: 4rem; font-size: clamp(2rem, 5vw, 4.3rem); }
.paper article > h3 { margin-top: 2rem; font-size: 1.55rem; }
.paper p, .paper li, .review-page p, .review-page li { font-size: 1.05rem; }
.paper p { margin: 1.1rem 0; }
.numbered { padding-left: 1rem; border-left: 2px solid var(--linen); }
blockquote {
  margin: 2rem 0;
  padding: 1.5rem;
  border-left: 4px solid var(--sage);
  color: var(--moss);
  font-size: 1.4rem;
  background: color-mix(in srgb, var(--paper), transparent 15%);
}
.system-map {
  border: 1px solid var(--linen);
  padding: 1rem;
  margin: 2rem 0 3rem;
  background: var(--paper);
}
.system-map figcaption { color: var(--stone); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 1rem; }
.system-map div { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.system-map span {
  border: 1px solid var(--sage);
  padding: 0.45rem 0.65rem;
  color: var(--moss);
}
.footnote-ref { font-size: 0.78em; text-decoration: none; color: var(--moss); }
.footnotes {
  margin-top: 4rem;
  border-top: 1px solid var(--linen);
  padding-top: 2rem;
}
.footnotes li { margin-bottom: 0.9rem; overflow-wrap: anywhere; }
.chapter-controls {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--linen);
  margin-top: 3rem;
  padding-top: 1.5rem;
}
.review-page { margin: 0 auto; }
.feedback-panel { border-top: 1px solid var(--linen); margin-top: 3rem; padding-top: 2rem; }
.questionnaire {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--paper);
  border: 1px solid var(--linen);
  overflow-wrap: anywhere;
}
pre {
  white-space: pre-wrap;
  background: var(--ink);
  color: var(--bone);
  padding: 1rem;
  overflow: auto;
}

@media (max-width: 820px) {
  .topbar, .reader-header { align-items: flex-start; }
  .reader-shell { display: block; }
  .menu-button { display: inline-block; padding: 0.35rem 0.55rem; }
  .chapter-nav {
    display: none;
    position: fixed;
    inset: 60px 0 auto 0;
    height: 70vh;
    background: var(--bone);
    border-right: 0;
    border-bottom: 1px solid var(--linen);
    z-index: 30;
  }
  .chapter-nav.open { display: block; }
  .cards, .decision-grid { grid-template-columns: 1fr; }
  h1 { font-size: clamp(2.6rem, 15vw, 4.4rem); }
  .paper, .review-page { padding-top: 2rem; }
}

@media print {
  .topbar, .reader-header, .chapter-nav, .progress, .chapter-controls, .actions, button { display: none !important; }
  body { background: white; color: black; }
  .reader-shell { display: block; }
  .paper { max-width: none; padding: 0; }
  a { color: black; text-decoration: none; }
}