:root {
  --paper: #f4f3ee;
  --surface: #fbfaf6;
  --ink: #202521;
  --muted: #69716b;
  --line: #d8dbd5;
  --accent: #176c5a;
  --accent-soft: #dcebe5;
  --radius: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
}
button { font: inherit; }
a { color: inherit; }
.shell { width: min(1320px, calc(100% - 40px)); margin: 0 auto; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 4;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.topbar-inner { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { text-decoration: none; font-weight: 760; letter-spacing: -.02em; }
nav { display: flex; gap: 7px; }
nav a { padding: 7px 9px; border-radius: 8px; color: var(--muted); font-size: 13px; text-decoration: none; }
nav a:hover, nav a:focus-visible { background: var(--surface); color: var(--ink); outline: none; }
.version, .section-number, .step { font: 700 11px/1 ui-monospace, "Cascadia Code", monospace; letter-spacing: .1em; color: var(--accent); }
.hero { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(280px, .62fr); gap: clamp(38px, 9vw, 130px); padding: 88px 0 68px; align-items: end; }
.eyebrow { display: flex; gap: 9px; align-items: center; color: var(--accent); font-size: 12px; font-weight: 720; letter-spacing: .1em; text-transform: uppercase; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
h1 { margin: 17px 0 20px; max-width: 940px; font-size: clamp(42px, 6vw, 74px); line-height: .98; letter-spacing: -.055em; }
.lede { max-width: 750px; margin: 0; color: var(--muted); font-size: clamp(17px, 2vw, 21px); }
.scope-note { border-top: 2px solid var(--ink); padding-top: 18px; }
.scope-note strong { display: block; margin-bottom: 6px; }
.scope-note p { margin: 0; color: var(--muted); font-size: 14px; }
.snapshot { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; border-block: 1px solid var(--line); }
.snapshot > div { padding: 24px 20px 24px 0; }
.snapshot > div + div { border-left: 1px solid var(--line); padding-left: 20px; }
.snapshot b { display: block; font: 720 clamp(28px, 3vw, 43px)/1 ui-monospace, "Cascadia Code", monospace; letter-spacing: -.05em; }
.snapshot span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
section { padding: 80px 0; border-bottom: 1px solid var(--line); }
.split, .decision-section { display: grid; grid-template-columns: minmax(250px, .65fr) minmax(0, 1.35fr); gap: clamp(42px, 9vw, 130px); }
h2 { margin: 12px 0 16px; font-size: clamp(31px, 4vw, 50px); line-height: 1; letter-spacing: -.045em; }
.section-heading > p, .pilot-title > p { max-width: 42ch; margin: 0; color: var(--muted); }
.evidence-list { border-top: 2px solid var(--ink); }
.evidence-list article { display: grid; grid-template-columns: 68px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.evidence-list article > span { color: var(--accent); font: 700 12px/1.5 ui-monospace, "Cascadia Code", monospace; }
.evidence-list h3, .sequence h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: -.02em; }
.evidence-list p, .sequence p { margin: 0; color: var(--muted); }
.pilot-title { display: grid; grid-template-columns: 1fr minmax(260px, .65fr); align-items: end; gap: 30px; }
.filter-row { display: flex; gap: 6px; margin: 30px 0 14px; }
.filter { border: 1px solid var(--line); border-radius: 9px; background: transparent; color: var(--muted); padding: 8px 12px; cursor: pointer; }
.filter:hover, .filter:focus-visible { color: var(--ink); outline: 2px solid var(--accent); outline-offset: 1px; }
.filter.active { background: var(--ink); border-color: var(--ink); color: var(--surface); }
.filter:active, .copy-button:active { transform: translateY(1px); }
.issue-table { border-top: 2px solid var(--ink); }
.issue-row { display: grid; grid-template-columns: 72px minmax(240px, 1.4fr) minmax(170px, .72fr) minmax(180px, .78fr); gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); align-items: start; animation: enter .35s cubic-bezier(.16,1,.3,1) both; animation-delay: calc(var(--i) * 35ms); }
@keyframes enter { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: translateY(0); } }
.issue-number { color: var(--accent); font: 720 13px/1.4 ui-monospace, "Cascadia Code", monospace; text-decoration: none; }
.issue-title { margin: 0; font-size: 16px; letter-spacing: -.015em; }
.issue-state strong, .issue-rec strong { display: block; margin-bottom: 4px; font-size: 12px; }
.issue-state span, .issue-rec span { color: var(--muted); font-size: 13px; }
.area-row { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 9px; }
.area { padding: 3px 6px; border-radius: 5px; background: var(--accent-soft); color: #285d50; font: 650 10px/1.3 ui-monospace, "Cascadia Code", monospace; }
.empty { display: none; padding: 30px 0; color: var(--muted); }
.sequence { list-style: none; padding: 0; margin: 0; border-top: 2px solid var(--ink); }
.sequence li { display: grid; grid-template-columns: 60px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.sequence span { display: block; margin-top: 8px; color: var(--accent); font-size: 12px; font-weight: 680; }
.upstream-fit { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(42px, 9vw, 130px); }
.upstream-fit p { margin: 0; color: var(--muted); }
.upstream-fit p + p { margin-top: 18px; }
.upstream-fit a { color: var(--accent); font-weight: 680; }
.questions { list-style: none; padding: 0; margin: 0 0 24px; border-top: 2px solid var(--ink); }
.questions li { display: grid; grid-template-columns: 48px 1fr; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.questions span { color: var(--accent); font: 720 12px/1.5 ui-monospace, "Cascadia Code", monospace; }
.questions p { margin: 0; }
.copy-button { border: 0; border-radius: 10px; background: var(--ink); color: var(--surface); padding: 11px 15px; font-weight: 680; cursor: pointer; }
.copy-status { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
footer { display: grid; grid-template-columns: 1fr auto; gap: 30px; padding: 38px 0 56px; color: var(--muted); font-size: 13px; }
footer strong, footer span { display: block; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 14px; }
.footer-links a { color: var(--accent); }
code { font-family: ui-monospace, "Cascadia Code", monospace; font-size: .9em; }

@media (max-width: 900px) {
  .shell { width: min(100% - 28px, 1320px); }
  nav { display: none; }
  .hero, .split, .decision-section, .upstream-fit { grid-template-columns: 1fr; gap: 30px; }
  .hero { padding: 58px 0 48px; }
  .snapshot { grid-template-columns: 1fr 1fr; }
  .snapshot > div:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .snapshot > div:nth-child(4) { border-top: 1px solid var(--line); }
  .issue-row { grid-template-columns: 58px 1fr; }
  .issue-state, .issue-rec { grid-column: 2; }
  footer { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}

@media (max-width: 560px) {
  h1 { font-size: 42px; }
  section { padding: 56px 0; }
  .snapshot, .pilot-title, .issue-row { grid-template-columns: 1fr; }
  .snapshot > div + div, .snapshot > div:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .issue-state, .issue-rec { grid-column: 1; }
  .filter-row { align-items: stretch; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .issue-row { animation: none; }
  * { transition: none !important; }
}