:root {
  color-scheme: dark;
  --bg: #0f1011;
  --surface: #151719;
  --surface-2: #1b1e21;
  --surface-3: #202428;
  --text: #e7e3da;
  --text-strong: #f4f1ea;
  --muted: #9a9a94;
  --muted-2: #747873;
  --line: #303439;
  --line-soft: #24282c;
  --accent: #b8a46f;
  --accent-2: #7fb0aa;
  --danger-accent: #b57c67;
  --focus: rgba(184, 164, 111, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
}

button,
input {
  font: inherit;
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow: auto;
  padding: 22px 18px;
  border-right: 1px solid var(--line);
  background: var(--surface);
}

.brand {
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0;
  font-size: 11px;
  font-weight: 700;
}

.brand h1 {
  margin: 0;
  color: var(--text-strong);
  font-size: 24px;
  font-weight: 650;
  line-height: 1.15;
}

.lede {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.45;
  font-size: 14px;
}

.timeline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.controls {
  margin-bottom: 20px;
}

.search {
  display: block;
  margin-bottom: 12px;
}

.search span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
}

.search input {
  width: 100%;
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #101214;
  color: var(--text);
}

.search input:focus {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
  border-color: var(--accent);
}

.view-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #111315;
}

.switch,
.ghost-button,
.ghost-link,
.jump-link {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.switch {
  min-height: 32px;
  padding: 6px 10px;
  border-color: transparent;
  color: var(--muted);
}

.switch:hover,
.ghost-button:hover,
.ghost-link:hover,
.jump-link:hover {
  background: var(--surface-3);
  border-color: #42484e;
  color: var(--text-strong);
}

.switch.is-active {
  background: var(--surface-3);
  color: var(--text-strong);
  border-color: var(--line);
}

.library-nav {
  display: grid;
  gap: 18px;
}

.nav-group h2,
.outline-wrap h3,
.timeline-legend h2,
.timeline-jump-wrap h2,
.timeline-sources h2 {
  margin: 0 0 8px;
  color: var(--muted-2);
  text-transform: uppercase;
  letter-spacing: 0;
  font-size: 11px;
  font-weight: 700;
}

.nav-list {
  display: grid;
  gap: 2px;
}

.nav-item {
  display: block;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.nav-item:hover {
  background: var(--surface-2);
}

.nav-item.is-active {
  background: #22262a;
  border-color: var(--line);
  color: var(--text-strong);
}

.nav-item-title {
  display: block;
  font-size: 14px;
  line-height: 1.35;
}

.nav-item-meta {
  display: block;
  margin-top: 2px;
  color: var(--muted-2);
  font-size: 11px;
  line-height: 1.35;
}

.reader {
  padding: 24px 28px 48px;
}

.reader-head {
  display: flex;
  gap: 18px;
  justify-content: space-between;
  align-items: flex-end;
  max-width: 1180px;
  margin: 0 auto 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.doc-meta {
  margin: 0 0 6px;
  color: var(--muted-2);
  text-transform: uppercase;
  letter-spacing: 0;
  font-size: 11px;
  font-weight: 700;
}

.doc-title {
  margin: 0;
  color: var(--text-strong);
  font-size: 30px;
  font-weight: 650;
  line-height: 1.16;
}

.reader-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ghost-button,
.ghost-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 7px 11px;
  font-size: 13px;
}

.reader-body {
  display: grid;
  grid-template-columns: minmax(0, 860px) 240px;
  gap: 28px;
  align-items: start;
  justify-content: center;
}

.document,
.outline-wrap,
.overview-card,
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.document {
  padding: 34px 38px;
  color: var(--text);
  line-height: 1.72;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
}

.document h1,
.document h2,
.document h3,
.document h4 {
  color: var(--text-strong);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 650;
  line-height: 1.22;
  margin-top: 1.7em;
  margin-bottom: 0.55em;
}

.document h1:first-child,
.document h2:first-child,
.document h3:first-child {
  margin-top: 0;
}

.document h1 {
  font-size: 28px;
}

.document h2 {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 22px;
}

.document h3 {
  font-size: 18px;
}

.document h4 {
  font-size: 16px;
}

.document p,
.document ul,
.document ol,
.document blockquote,
.document table {
  margin: 0 0 1em;
}

.document ul,
.document ol {
  padding-left: 1.35em;
}

.document li + li {
  margin-top: 0.25em;
}

.document blockquote {
  margin-left: 0;
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: #111315;
  color: #d8d3c9;
}

.document hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2em 0;
}

.document code {
  padding: 0.1em 0.28em;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  background: #101214;
  color: #e8d7a4;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.88em;
}

.document pre {
  overflow: auto;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #101214;
  color: var(--text);
}

.document pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
}

.document table {
  width: 100%;
  border-collapse: collapse;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
}

.document th,
.document td {
  padding: 9px 10px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.document thead th {
  background: var(--surface-2);
  color: var(--text-strong);
}

.outline-wrap {
  position: sticky;
  top: 24px;
  padding: 16px;
}

.outline {
  display: grid;
  gap: 7px;
}

.outline a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.35;
}

.outline a:hover {
  color: var(--text-strong);
}

.outline a[data-level="3"] {
  padding-left: 10px;
}

.outline a[data-level="4"] {
  padding-left: 20px;
}

.empty-state {
  color: var(--muted);
  font-style: italic;
}

.timeline-shell {
  grid-template-columns: 340px minmax(0, 1fr);
}

.timeline-legend,
.timeline-jump-wrap,
.timeline-sources {
  margin-bottom: 20px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 13px;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.legend-dot-official {
  background: var(--accent);
}

.legend-dot-project {
  background: var(--accent-2);
}

.timeline-note {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.source-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
}

.source-link:hover {
  text-decoration: underline;
}

.source-link.small,
.timeline-source-text {
  font-size: 12px;
}

.timeline-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.timeline-period-links {
  display: grid;
  gap: 6px;
}

.jump-link {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 9px;
  color: var(--muted);
  font-size: 12px;
}

.timeline-period-links .jump-link {
  display: flex;
  min-height: 34px;
}

.timeline-reader {
  padding-bottom: 64px;
}

.timeline-head {
  margin-bottom: 20px;
}

.timeline-column-toggles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 1180px;
  margin: 0 auto 18px;
}

.timeline-column-toggles .switch {
  justify-self: stretch;
  border-color: var(--line);
}

.timeline-overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 1180px;
  margin: 0 auto 22px;
}

.overview-card {
  padding: 15px 16px;
}

.overview-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted-2);
  text-transform: uppercase;
  letter-spacing: 0;
  font-size: 11px;
  font-weight: 700;
}

.overview-card strong {
  color: var(--text-strong);
  font-size: 24px;
  font-weight: 650;
  line-height: 1;
}

.timeline-root {
  display: grid;
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
}

.timeline-media-section {
  display: grid;
  gap: 12px;
}

.timeline-media-banner {
  position: sticky;
  top: 12px;
  z-index: 5;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: #16181a;
  color: var(--text-strong);
  font-size: 16px;
  font-weight: 650;
  line-height: 1.3;
}

.timeline-media-body {
  display: grid;
  gap: 18px;
}

.timeline-year-section {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.timeline-year-column {
  position: sticky;
  top: 18px;
}

.timeline-year {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 120px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--text-strong);
  font-size: 15px;
  font-weight: 650;
  line-height: 1.2;
  text-align: center;
  overflow-wrap: anywhere;
}

.timeline-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
}

.timeline-grid::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line-soft);
}

.timeline-grid-single {
  grid-template-columns: minmax(0, 1fr);
}

.timeline-grid-single::before {
  display: none;
}

.timeline-lane {
  display: grid;
  gap: 10px;
}

.timeline-card {
  padding: 15px 16px;
}

.timeline-card-official {
  border-left: 4px solid var(--accent);
}

.timeline-card-project {
  border-left: 4px solid var(--accent-2);
}

.timeline-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  padding: 3px 7px;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  background: #111315;
  color: var(--muted);
  font-size: 11px;
}

.timeline-card h3 {
  margin: 0 0 7px;
  color: var(--text-strong);
  font-size: 18px;
  font-weight: 650;
  line-height: 1.2;
}

.timeline-card p {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}

.timeline-source {
  margin-top: 10px;
}

.timeline-empty {
  margin: 0;
  color: var(--muted);
  font-style: italic;
}

@media (max-width: 1100px) {
  .shell,
  .timeline-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .reader-body {
    grid-template-columns: 1fr;
  }

  .outline-wrap,
  .timeline-year-column {
    position: static;
  }

  .timeline-media-banner {
    top: 0;
  }
}

@media (max-width: 720px) {
  .reader,
  .sidebar {
    padding: 16px;
  }

  .reader-head {
    flex-direction: column;
    align-items: stretch;
  }

  .reader-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .document {
    padding: 22px 18px;
    font-size: 17px;
  }

  .doc-title {
    font-size: 25px;
  }

  .timeline-overview,
  .timeline-grid,
  .timeline-column-toggles,
  .timeline-year-section {
    grid-template-columns: 1fr;
  }

  .timeline-grid::before {
    display: none;
  }
}