:root {
  --paper: #f7f9fb;
  --ink: #122032;
  --muted: #617083;
  --line: #d7e0e8;
  --navy: #132f4d;
  --lime: #b7d85d;
  --shadow: 0 26px 80px rgba(18, 32, 50, .16);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.68;
}
a { color: inherit; }
.chronicle-top {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 54px);
  background: rgba(247, 249, 251, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.chronicle-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  min-width: 0;
  text-decoration: none;
}
.brand-glyph {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: radial-gradient(circle at 50% 38%, #fff 0 10%, transparent 11%), linear-gradient(135deg, var(--navy), #0f1e30 60%, var(--lime));
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .45);
}
.chronicle-brand strong { display: block; font-size: 17px; }
.chronicle-brand small { display: block; color: var(--muted); font-size: 12px; }
.chronicle-nav { display: flex; gap: 8px; align-items: center; }
.chronicle-nav a,
.lead-actions a,
.cover-actions a,
.device-note a,
.text-pill,
.article-links a,
.context-band a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 9px 13px;
  font-weight: 850;
}
.chronicle-nav a { font-size: 14px; background: transparent; }
.chronicle-nav a:hover { background: #fff; }
.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 9px 12px;
  color: var(--ink);
  font-weight: 850;
}
.route-cover {
  position: relative;
  min-height: 720px;
  display: grid;
  align-items: end;
  overflow: hidden;
}
.route-cover > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.cover-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10, 20, 32, .82), rgba(10, 20, 32, .44) 44%, rgba(10, 20, 32, .08));
}
.cover-copy {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 0 66px clamp(18px, 5vw, 78px);
  padding: 32px 0;
  color: #fff;
}
.kicker {
  margin: 0 0 12px;
  color: var(--navy);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0;
}
.cover-copy .kicker { color: var(--lime); }
.cover-copy h1,
.page-lead h1,
.timeline-intro h2,
.device-table h2,
.edition-section h2,
.question-ledger h2,
.article-page h1 {
  font-family: Georgia, "Times New Roman", "Noto Serif SC", serif;
  line-height: 1.08;
  font-weight: 850;
  letter-spacing: 0;
}
.cover-copy h1 {
  font-size: clamp(42px, 6vw, 82px);
  margin: 0;
  max-width: 850px;
}
.cover-copy h1 span { display: block; }
.cover-copy p { font-size: 19px; max-width: 690px; }
.cover-actions,
.lead-actions,
.article-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.cover-actions a:first-child,
.lead-actions a:first-child {
  background: #fff;
  color: #132033;
}
.cover-actions a:last-child,
.lead-actions a:last-child {
  background: rgba(255, 255, 255, .14);
  color: #fff;
  border-color: rgba(255, 255, 255, .35);
}
.chronicle-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.chronicle-strip a {
  padding: 22px clamp(16px, 3vw, 34px);
  text-decoration: none;
  border-right: 1px solid var(--line);
}
.chronicle-strip a:last-child { border-right: 0; }
.chronicle-strip b,
.chronicle-strip span { display: block; }
.chronicle-strip span { color: var(--muted); font-size: 14px; }
.timeline-panel,
.device-table,
.route-register,
.edition-section,
.question-ledger,
.page-lead,
.device-grid.wide,
.prompt-table,
.step-board,
.context-band,
.plan-board,
.help-desk,
.archive-grid,
.bottom-grid {
  padding: 70px clamp(18px, 4vw, 56px);
}
.timeline-panel {
  display: grid;
  grid-template-columns: .58fr 1.42fr;
  gap: 36px;
  align-items: start;
  background: #fff;
}
.timeline-intro { position: sticky; top: 88px; }
.timeline-intro h2,
.device-table h2,
.edition-section h2,
.question-ledger h2 {
  font-size: 38px;
  margin: 0 0 14px;
}
.timeline-intro p,
.device-table p,
.edition-row p,
.article-page p,
.bottom-grid p,
.page-lead div {
  color: #425269;
}
.timeline-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: item;
  border-left: 3px solid var(--navy);
}
.timeline-rail li {
  counter-increment: item;
  position: relative;
  margin: 0 0 20px 26px;
  padding: 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  box-shadow: 0 10px 30px rgba(18, 32, 50, .08);
}
.timeline-rail li:before {
  content: counter(item);
  position: absolute;
  left: -44px;
  top: 20px;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--lime);
  border: 3px solid #fff;
  color: #122032;
  font-weight: 900;
}
.device-table {
  display: grid;
  grid-template-columns: .42fr 1fr;
  gap: 28px;
  background: #eef3f8;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.device-grid,
.route-register,
.plan-board,
.help-desk,
.archive-grid,
.bottom-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.device-grid.wide { grid-template-columns: repeat(4, 1fr); padding-top: 54px; }
.device-note,
.route-register article,
.plan-board article,
.help-desk article,
.archive-grid article,
.bottom-grid article {
  min-width: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 22px;
  min-height: 190px;
}
.archive-grid p,
.bottom-grid p,
.article-page p { overflow-wrap: anywhere; }
.device-note span { display: block; font-weight: 900; color: var(--navy); margin-bottom: 10px; }
.device-note p { color: var(--muted); }
.device-note a { background: #edf5d4; color: #243600; }
.route-register { background: #132033; color: #f7f9fb; }
.route-register.large { background: #fff; color: var(--ink); }
.route-register article { background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .18); }
.route-register.large article { background: #fff; border-color: var(--line); }
.route-register p { color: #cbd5df; }
.route-register.large p { color: var(--muted); }
.edition-section {
  display: grid;
  grid-template-columns: .32fr 1fr;
  gap: 30px;
}
.edition-section.full { display: block; padding-top: 50px; }
.edition-list { display: grid; gap: 0; border: 1px solid var(--line); background: #fff; }
.edition-row {
  display: grid;
  grid-template-columns: 112px 100px minmax(0, 1fr);
  gap: 14px;
  padding: 20px;
  border-bottom: 1px solid var(--line);
}
.edition-row:last-child { border-bottom: 0; }
.edition-row time,
.edition-row span { color: var(--muted); font-size: 14px; }
.edition-row h3 { margin: 0; font-size: 21px; }
.edition-row p { grid-column: 3; margin: 6px 0 0; }
.page-lead {
  background: linear-gradient(135deg, #fff, #edf3f8);
  border-bottom: 1px solid var(--line);
}
.page-lead h1 { font-size: clamp(34px, 5vw, 68px); margin: 0; max-width: 1040px; }
.page-lead div { max-width: 850px; font-size: 18px; }
.page-lead .lead-actions a:last-child { color: var(--ink); background: #fff; border-color: var(--line); }
.prompt-table { background: #fff; }
.prompt-table h2,
.step-board h2,
.context-band h2 {
  font-family: Georgia, "Times New Roman", "Noto Serif SC", serif;
  font-size: 32px;
  margin-top: 0;
}
.prompt-row {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  border: 1px solid var(--line);
  border-bottom: 0;
  background: #fff;
}
.prompt-row:last-child { border-bottom: 1px solid var(--line); }
.prompt-row b,
.prompt-row span { padding: 16px 18px; }
.prompt-row b { border-right: 1px solid var(--line); background: #eef3f8; }
.step-board ol {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
  counter-reset: step;
}
.step-board li {
  counter-increment: step;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 22px;
}
.step-board li:before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
}
.context-band { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.context-band p { max-width: 900px; color: var(--muted); }
.question-ledger { background: #edf3f8; }
.question-ledger details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 4px;
  margin: 10px 0;
  padding: 16px;
}
.question-ledger summary { font-weight: 900; cursor: pointer; }
.article-page { max-width: 920px; margin: 0 auto; padding: 72px 20px; }
.article-page header { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.article-page h1 { font-size: clamp(34px, 5vw, 62px); margin: 0; }
.article-page time { display: inline-block; color: var(--navy); font-weight: 900; margin-top: 14px; }
.article-page section { padding: 24px 0; border-bottom: 1px solid var(--line); }
.article-page h2 { font-size: 28px; margin: 0 0 10px; }
.chronicle-footer {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 20px;
  padding: 34px clamp(18px, 4vw, 56px);
  background: #101b29;
  color: #f7f9fb;
}
.chronicle-footer p { color: #c8d4df; }
.chronicle-footer a { color: #f7f9fb; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.32); }
.chronicle-footer nav { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-start; justify-content: flex-end; }
@media (max-width: 980px) {
  .chronicle-strip,
  .device-grid,
  .device-grid.wide,
  .route-register,
  .plan-board,
  .help-desk,
  .archive-grid,
  .bottom-grid,
  .step-board ol { grid-template-columns: 1fr 1fr; }
  .timeline-panel,
  .device-table,
  .edition-section { grid-template-columns: 1fr; }
  .timeline-intro { position: static; }
  .route-cover { min-height: 620px; }
  .cover-copy { margin-right: 18px; }
  .edition-row { grid-template-columns: 100px 88px minmax(0, 1fr); }
}
@media (max-width: 720px) {
  .chronicle-top { align-items: flex-start; }
  .menu-toggle { display: inline-flex; }
  .chronicle-nav {
    position: absolute;
    left: 18px;
    right: 18px;
    top: 70px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border: 1px solid var(--line);
    padding: 10px;
    box-shadow: var(--shadow);
  }
  .chronicle-nav.is-open { display: flex; }
  .chronicle-nav a { background: transparent; }
  .route-cover { min-height: 600px; }
  .cover-shade { background: linear-gradient(180deg, rgba(10,20,32,.42), rgba(10,20,32,.86)); }
  .cover-copy { margin: 0 18px 34px; padding: 20px 0; }
  .cover-copy h1 { font-size: 36px; }
  .page-lead h1 { font-size: 34px; }
  .chronicle-strip,
  .device-grid,
  .device-grid.wide,
  .route-register,
  .plan-board,
  .help-desk,
  .archive-grid,
  .bottom-grid,
  .step-board ol { grid-template-columns: 1fr; }
  .chronicle-strip a { border-right: 0; border-bottom: 1px solid var(--line); }
  .timeline-panel,
  .device-table,
  .route-register,
  .edition-section,
  .question-ledger,
  .page-lead,
  .device-grid.wide,
  .prompt-table,
  .step-board,
  .context-band,
  .plan-board,
  .help-desk,
  .archive-grid,
  .bottom-grid { padding-left: 18px; padding-right: 18px; }
  .timeline-rail { margin-left: 10px; }
  .prompt-row { grid-template-columns: 1fr; }
  .prompt-row b { border-right: 0; border-bottom: 1px solid var(--line); }
  .edition-row { display: block; }
  .edition-row h3 { margin-top: 8px; }
  .edition-row p { grid-column: auto; }
  .chronicle-footer { display: block; }
  .chronicle-footer nav { justify-content: flex-start; margin-top: 18px; }
  .chronicle-brand small { display: none; }
}