:root {
  --bg: #07111f;
  --bg-2: #0b1829;
  --bg-3: #102036;
  --ink: #ece8de;
  --muted: #9aa6b8;
  --gold: #d4af37;
  --gold-2: #e8c95a;
  --line: rgba(212, 175, 55, 0.18);
  --line-2: rgba(255, 255, 255, 0.08);
  --card: #0e1c31;
  --buy: #1a2f28;
  --buy-line: #3d8f72;
  --nexus: #1a2438;
  --max: 42rem;
  --sidebar: 17.5rem;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "DM Sans", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 18px/1.7 var(--serif);
}

a { color: var(--gold-2); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #fff; }

.progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-2));
  z-index: 50; pointer-events: none;
}

.shell { display: flex; min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; align-self: flex-start;
  width: var(--sidebar); height: 100vh;
  overflow: auto; padding: 1.25rem 1rem 3rem;
  border-right: 1px solid var(--line-2);
  background: var(--bg-2);
  flex-shrink: 0;
}
.brand {
  display: block; color: var(--ink); text-decoration: none;
  font-family: var(--sans); font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; font-size: 11px; line-height: 1.4;
  padding: 0.25rem 0.5rem 1rem;
}
.brand span { color: var(--gold); display: block; font-size: 13px; letter-spacing: 0.14em; }
.toc-search {
  width: 100%; background: var(--bg-3); border: 1px solid var(--line-2);
  color: var(--ink); border-radius: 8px; padding: 0.45rem 0.65rem;
  font: 13px/1.3 var(--sans); margin: 0 0 0.85rem;
}
.toc-search::placeholder { color: var(--muted); }
.nav-group { margin: 0 0 0.85rem; }
.nav-group h3 {
  margin: 0 0 0.35rem; padding: 0 0.5rem;
  font: 600 10px/1.3 var(--sans); letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--gold);
}
.nav-group a {
  display: block; color: var(--muted); text-decoration: none;
  font: 400 13px/1.35 var(--sans); padding: 0.28rem 0.5rem; border-radius: 6px;
}
.nav-group a:hover, .nav-group a.active { background: var(--bg-3); color: var(--ink); }
.nav-group a.active { color: var(--gold-2); }

.content { flex: 1; min-width: 0; }
.topbar {
  display: none; position: sticky; top: 0; z-index: 20;
  background: rgba(7, 17, 31, 0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-2);
  padding: 0.7rem 1rem; align-items: center; gap: 0.75rem;
}
.menu-btn {
  background: transparent; color: var(--ink); border: 1px solid var(--line-2);
  border-radius: 8px; padding: 0.35rem 0.65rem; font: 600 13px var(--sans);
}
.topbar .brand { padding: 0; }

article.chapter {
  max-width: calc(var(--max) + 4rem);
  margin: 0 auto;
  padding: 2.5rem 2rem 6rem;
}
.kicker {
  font: 600 11px/1.3 var(--sans); letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--gold); margin: 0 0 0.6rem;
}
article.chapter h1 {
  font-family: var(--display); font-weight: 500; font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 1.5rem;
}
article.chapter h2 {
  font-family: var(--display); font-weight: 500; font-size: 1.45rem;
  margin: 2.4rem 0 0.8rem; line-height: 1.25;
}
article.chapter h3 {
  font-family: var(--sans); font-weight: 650; font-size: 1.05rem;
  margin: 1.8rem 0 0.55rem;
}
article.chapter p { margin: 0 0 1.05rem; }
article.chapter hr {
  border: 0; border-top: 1px solid var(--line); margin: 2rem 0;
}
article.chapter blockquote {
  margin: 1.4rem 0; padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 2px solid var(--gold);
  color: var(--muted); font-style: italic;
}
article.chapter blockquote.callout {
  font-style: normal; color: var(--ink);
  background: var(--buy); border: 1px solid var(--buy-line);
  border-left: 3px solid var(--buy-line); border-radius: 10px;
  padding: 1rem 1.1rem; margin: 1.6rem 0;
}
article.chapter blockquote.callout p:last-child { margin-bottom: 0; }
article.chapter img {
  display: block; max-width: 100%; height: auto; margin: 1.4rem auto;
  border-radius: 10px; border: 1px solid var(--line-2); background: #fff;
}
article.chapter ul, article.chapter ol { margin: 0 0 1.1rem; padding-left: 1.25rem; }
article.chapter li { margin: 0.25rem 0; }
article.chapter table {
  width: 100%; border-collapse: collapse; font-size: 0.88rem;
  font-family: var(--sans); margin: 1.1rem 0 1.5rem;
}
article.chapter th, article.chapter td {
  border: 1px solid var(--line-2); padding: 0.45rem 0.55rem; text-align: left; vertical-align: top;
}
article.chapter th { background: var(--bg-3); color: var(--gold-2); font-weight: 600; }
article.chapter td { background: rgba(16, 32, 54, 0.4); }
.table-wrap { overflow-x: auto; margin: 0 0 1.4rem; }
.table-wrap table { margin: 0; }
.nexus-box {
  background: linear-gradient(180deg, #14243c, #101c30);
  border: 1px solid var(--line); border-radius: 12px;
  padding: 0.2rem 1.15rem 0.4rem; margin: 1.6rem 0 2rem;
}
.nexus-box > h2 { margin-top: 1.1rem; color: var(--gold-2); }
.actions-box {
  background: var(--bg-3); border: 1px solid var(--line-2);
  border-radius: 12px; padding: 0.2rem 1.15rem 0.5rem; margin: 2rem 0 0;
}

.pager {
  display: flex; justify-content: space-between; gap: 1rem;
  max-width: calc(var(--max) + 4rem); margin: 0 auto; padding: 0 2rem 4rem;
}
.pager a {
  flex: 1; text-decoration: none; color: var(--ink);
  border: 1px solid var(--line-2); border-radius: 12px; padding: 0.9rem 1rem;
  font-family: var(--sans); font-size: 14px; background: var(--bg-2);
}
.pager a:hover { border-color: var(--gold); }
.pager .dir { display: block; color: var(--gold); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 0.25rem; }
.pager .next { text-align: right; }

.home { max-width: 72rem; margin: 0 auto; padding: 2.5rem 1.5rem 5rem; }
.hero {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2.5rem; align-items: center;
  margin-bottom: 3rem;
}
.hero img {
  width: 100%; border-radius: 16px; border: 1px solid var(--line);
  box-shadow: 0 30px 80px rgba(0,0,0,0.35);
}
.hero h1 {
  font-family: var(--display); font-weight: 500; font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.05; margin: 0 0 0.6rem; letter-spacing: -0.03em;
}
.hero h1 em { font-style: italic; color: var(--gold); }
.hero .sub { color: var(--muted); font-size: 1.15rem; margin: 0 0 1.2rem; }
.meta { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0 0 1.2rem; }
.chip {
  font: 600 11px/1 var(--sans); letter-spacing: 0.08em; text-transform: uppercase;
  border: 1px solid var(--line); color: var(--gold-2); padding: 0.4rem 0.6rem; border-radius: 999px;
}
.cta {
  display: inline-block; background: var(--gold); color: #111 !important;
  text-decoration: none; font: 700 14px var(--sans); letter-spacing: 0.04em;
  padding: 0.75rem 1.1rem; border-radius: 999px; margin: 0 0.5rem 0.5rem 0;
  border: 0; cursor: pointer;
}
.cta.ghost { background: transparent; color: var(--ink) !important; border: 1px solid var(--line-2); }
.byline {
  font-family: var(--sans); font-size: 1.05rem; font-weight: 600;
  letter-spacing: 0.04em; color: var(--gold-2); margin: 0 0 0.9rem;
}
article.chapter .byline { font-size: 0.95rem; margin: -0.7rem 0 1.4rem; }
.sidebar-author {
  margin: 0 0.5rem 0.25rem; font: 600 12px/1.4 var(--sans);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold);
}
.sidebar-links {
  margin: 0 0.5rem 0.9rem; font: 500 11px/1.4 var(--sans);
}
.sidebar-links a { color: var(--muted); text-decoration: none; }
.sidebar-links a:hover { color: var(--gold-2); }
.site-footer {
  padding: 0 2rem 3.5rem; color: var(--muted);
  font: 14px/1.5 var(--sans);
}
.aka { margin: 0.15rem 0 0.55rem; font-size: 13px; }
.author-links a { color: var(--gold-2); margin-right: 0.15rem; }

.toc-grid { display: grid; gap: 1.25rem; }
.part {
  background: var(--card); border: 1px solid var(--line-2); border-radius: 14px;
  padding: 1.1rem 1.2rem 0.6rem;
}
.part h2 {
  font: 600 12px/1.3 var(--sans); letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--gold); margin: 0 0 0.7rem;
}
.part a {
  display: flex; justify-content: space-between; gap: 1rem;
  color: var(--ink); text-decoration: none; font-family: var(--sans);
  padding: 0.55rem 0; border-top: 1px solid var(--line-2); font-size: 15px;
}
.part a:first-of-type { border-top: 0; }
.part a:hover { color: var(--gold-2); }
.part .num { color: var(--muted); font-size: 12px; white-space: nowrap; }

.search-modal {
  display: none; position: fixed; inset: 0; z-index: 60;
  background: rgba(0,0,0,0.55); padding: 8vh 1rem 1rem;
}
.search-modal.open { display: block; }
.search-panel {
  max-width: 40rem; margin: 0 auto; background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
}
.search-panel input {
  width: 100%; background: transparent; border: 0; border-bottom: 1px solid var(--line-2);
  color: var(--ink); padding: 1rem 1.1rem; font: 16px var(--sans); outline: none;
}
.search-results { max-height: 60vh; overflow: auto; }
.search-results a {
  display: block; padding: 0.75rem 1.1rem; color: var(--ink); text-decoration: none;
  border-bottom: 1px solid var(--line-2); font-family: var(--sans); font-size: 14px;
}
.search-results a:hover, .search-results a.active { background: var(--bg-3); }
.search-results small { display: block; color: var(--muted); margin-top: 0.2rem; }

.overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 25;
}
.overlay.open { display: block; }

@media (max-width: 980px) {
  .sidebar {
    position: fixed; z-index: 30; transform: translateX(-105%);
    transition: transform 0.2s ease; width: min(86vw, 20rem);
  }
  .sidebar.open { transform: none; }
  .topbar { display: flex; }
  .hero { grid-template-columns: 1fr; }
  article.chapter, .pager { padding-left: 1.1rem; padding-right: 1.1rem; }
}

@media print {
  .sidebar, .topbar, .pager, .progress, .search-modal, .overlay, .cta { display: none !important; }
  body { background: #fff; color: #111; }
  article.chapter { max-width: none; }
}