@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/jetbrains-mono-subset.ttf") format("truetype");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

:root {
  --bg: #0d0906;
  --bg-elev: #150e09;
  --surface: #1b130d;
  --surface-2: #241910;
  --border-hairline: rgba(240, 229, 208, 0.1);
  --border-strong: rgba(240, 229, 208, 0.24);
  --text: #f0e5d0;
  --text-muted: #a89a83;
  --text-subtle: #756958;
  --accent: #d9631e;
  --accent-2: #4db6ac;
  --accent-3: #d8b04c;
  --danger: #e4574f;
  --good: #73b979;
  --focus: #d9631e;
  --display: "Space Grotesk", "Instrument Sans", Inter, sans-serif;
  --editorial: Georgia, serif;
  --subtitle: var(--sans);
  --mono: "JetBrains Mono", "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  --sans: "Instrument Sans", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --measure: 68ch;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-color: rgba(217, 99, 30, 0.55);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent);
}

button,
summary {
  font: inherit;
}

button {
  cursor: pointer;
}

code,
pre,
.mono {
  font-family: var(--mono);
}

.skip-link {
  position: fixed;
  left: 20px;
  top: 20px;
  transform: translateY(-160%);
  padding: 12px 16px;
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
  z-index: 1000;
  transition: transform 220ms var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--border-hairline);
  background: rgba(13, 9, 6, 0.92);
  backdrop-filter: blur(18px);
}

.topbar {
  width: min(1180px, calc(100% - 48px));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  display: grid;
  place-items: center;
  color: var(--accent);
  flex: 0 0 auto;
}

.brand-mark svg {
  width: 16px;
  height: 16px;
}

.brand-wordmark,
.section-kicker,
.eyebrow,
.meta-chip,
.toc-title,
.toc-list,
.breadcrumb,
.callout-label,
.depth-meter,
.small-link,
.footer-copy,
.table-mini,
.checklist-title,
.source-status,
.component-token {
  font-family: var(--mono);
}

.brand-wordmark {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  white-space: nowrap;
}

.top-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.top-links a {
  text-decoration: none;
}

.mobile-toc {
  display: none;
}

.page-shell {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 42px 0 88px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  gap: 44px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 92px;
  padding: 16px;
  border: 1px solid var(--border-hairline);
  border-radius: 8px;
  background: var(--bg-elev);
}

.toc-title {
  margin: 0 0 12px;
  color: var(--text-subtle);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.toc-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.35;
}

.toc-list a {
  display: block;
  padding: 8px 9px;
  border-radius: 6px;
  text-decoration: none;
}

.toc-list a:hover {
  background: rgba(217, 99, 30, 0.12);
}

.content {
  min-width: 0;
}

.hero {
  display: grid;
  gap: 20px;
  margin-bottom: 30px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-hairline);
}

.breadcrumb {
  color: var(--text-subtle);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 11ch;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(40px, 7vw, 86px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}

.hero h1.long-title {
  max-width: 14ch;
  font-size: clamp(36px, 5.8vw, 68px);
}

.hero h1.narrow-title {
  max-width: 100%;
  font-size: clamp(32px, 4.8vw, 56px);
}

.subtitle {
  max-width: 760px;
  margin: 0;
  color: var(--text-muted);
  font-family: var(--subtitle);
  font-size: clamp(18px, 1.6vw, 22px);
  font-style: normal;
  font-weight: 500;
  line-height: 1.55;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 10px;
  border: 1px solid var(--border-hairline);
  border-radius: 6px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.02);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.depth-meter {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.depth-meter span {
  width: 18px;
  height: 5px;
  border-radius: 6px;
  background: rgba(240, 229, 208, 0.18);
}

.depth-meter span.is-on {
  background: var(--accent);
}

.section {
  max-width: var(--measure);
  margin: 46px 0 0;
}

.section.wide {
  max-width: none;
}

.section-kicker,
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h2,
h3 {
  color: var(--text);
  line-height: 1.1;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 16px;
  font-family: var(--display);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  text-transform: uppercase;
}

h3 {
  margin: 28px 0 10px;
  font-size: 1.25rem;
}

p {
  max-width: var(--measure);
  margin: 0 0 14px;
  color: var(--text-muted);
  font-size: 1rem;
}

.lede {
  color: var(--text);
  font-size: 1.08rem;
}

ul,
ol {
  margin: 0 0 16px 1.2rem;
  color: var(--text-muted);
  padding: 0;
}

li {
  margin: 0 0 8px;
}

.callout {
  max-width: var(--measure);
  margin: 24px 0;
  padding: 16px 18px;
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--surface);
}

.callout p,
.callout ul,
.callout ol {
  margin-bottom: 0;
}

.callout p + p {
  margin-top: 10px;
}

.callout-label {
  display: block;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.callout.tldr {
  border-left-color: var(--accent);
  background: #1d130c;
}

.callout.key-stat {
  border-left-color: var(--accent-2);
}

.callout.key-stat .callout-label {
  color: var(--accent-2);
}

.callout.steal {
  border-left-color: var(--good);
}

.callout.steal .callout-label {
  color: var(--good);
}

.callout.skip {
  border-left-color: var(--danger);
}

.callout.skip .callout-label {
  color: var(--danger);
}

.callout.reset {
  border-left-color: var(--accent-3);
  background: #20180d;
}

.callout.reset .callout-label {
  color: var(--accent-3);
}

.callout.forum-note {
  border-style: dashed;
  border-left-color: #b7a7ff;
  background: #17131d;
}

.callout.forum-note .callout-label {
  color: #b7a7ff;
}

.source-line {
  color: var(--text-subtle);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.callout.compact {
  max-width: none;
}

.grid {
  display: grid;
  gap: 14px;
}

.chapter-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.chapter-card,
.source-card,
.component-card {
  padding: 18px;
  border: 1px solid var(--border-hairline);
  border-radius: 8px;
  background: var(--surface);
}

.chapter-card {
  display: grid;
  gap: 12px;
  min-height: 100%;
}

.chapter-card.is-live {
  border-color: var(--border-strong);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-number,
.source-status,
.component-token {
  color: var(--text-subtle);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.chapter-card h3,
.source-card h3,
.component-card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.chapter-card p,
.source-card p,
.component-card p {
  margin-bottom: 0;
  font-size: 0.94rem;
}

.small-link {
  justify-self: start;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
}

.source-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.source-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(120px, 180px);
  gap: 18px;
  align-items: start;
}

.source-card h3 a {
  color: var(--text);
}

.source-card p + p {
  margin-top: 8px;
}

.table-wrap {
  max-width: none;
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--border-hairline);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
  background: var(--surface);
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-hairline);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

td {
  color: var(--text-muted);
  font-size: 0.94rem;
}

tr:last-child td {
  border-bottom: 0;
}

.checklist-panel {
  max-width: var(--measure);
  margin: 24px 0;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: #f7efe1;
  color: #1b130d;
}

.checklist-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.checklist-panel summary::-webkit-details-marker {
  display: none;
}

.checklist-title {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.checklist-content {
  padding: 0 16px 18px;
}

.checklist-content ol,
.checklist-content ul {
  color: #2b2118;
}

.checklist-content li {
  padding-left: 2px;
}

.print-link {
  border: 1px solid rgba(27, 19, 13, 0.22);
  border-radius: 6px;
  background: transparent;
  color: #1b130d;
  padding: 7px 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.quote-strip {
  max-width: var(--measure);
  margin: 28px 0;
  padding: 18px 0 18px 20px;
  border-left: 4px solid var(--accent);
}

.quote-strip p {
  margin: 0;
  color: var(--text);
  font-family: var(--subtitle);
  font-size: 1.12rem;
  font-style: normal;
  font-weight: 500;
  line-height: 1.55;
}

.quote-strip cite {
  display: block;
  margin-top: 10px;
  color: var(--text-subtle);
  font-family: var(--mono);
  font-size: 11px;
  font-style: normal;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.visual-figure {
  max-width: none;
  margin: 26px 0;
  padding: 18px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(27, 19, 13, 0.96), rgba(12, 20, 19, 0.92));
}

.visual-figure.compact {
  max-width: var(--measure);
}

.figure-title,
.figure-caption,
.workflow-step span,
.flow-step span,
.bar-label,
.bar-value,
.matrix-cell span,
.image-panel span,
.phase-node span,
.metric-node span {
  font-family: var(--mono);
}

.figure-title {
  margin: 0 0 14px;
  color: var(--text);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.figure-caption {
  max-width: 84ch;
  margin: 14px 0 0;
  color: var(--text-subtle);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
}

.workflow-map,
.phase-map,
.metric-loop,
.image-strip {
  display: grid;
  gap: 12px;
}

.workflow-map {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.workflow-step,
.phase-node,
.metric-node,
.matrix-cell,
.image-panel {
  border: 1px solid var(--border-hairline);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
}

.workflow-step,
.phase-node,
.metric-node {
  padding: 14px;
}

.workflow-step span,
.phase-node span,
.metric-node span,
.matrix-cell span,
.image-panel span {
  display: block;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.workflow-step strong,
.phase-node strong,
.metric-node strong {
  display: block;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.15;
}

.workflow-step p,
.phase-node p,
.metric-node p,
.matrix-cell p {
  margin: 8px 0 0;
  font-size: 0.88rem;
}

.flow-list {
  display: grid;
  gap: 10px;
}

.flow-step {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--border-hairline);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
}

.flow-step span {
  color: var(--accent-2);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.flow-step p {
  margin: 0;
  font-size: 0.92rem;
}

.bar-chart {
  display: grid;
  gap: 11px;
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(92px, 150px) minmax(0, 1fr) minmax(58px, auto);
  gap: 10px;
  align-items: center;
}

.bar-label,
.bar-value {
  color: var(--text-muted);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bar-track {
  height: 14px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(240, 229, 208, 0.12);
}

.bar-fill {
  width: var(--w);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.matrix-cell {
  min-height: 120px;
  padding: 14px;
}

.matrix-cell:nth-child(2n) span {
  color: var(--accent-2);
}

.matrix-cell:nth-child(3n) span {
  color: var(--accent-3);
}

.image-strip {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.image-panel {
  position: relative;
  min-height: 132px;
  overflow: hidden;
  padding: 14px;
}

.image-panel span {
  position: relative;
  z-index: 2;
  margin-bottom: 0;
  color: var(--text);
}

.image-panel::before,
.image-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.image-panel.doc::before {
  background:
    linear-gradient(90deg, transparent 0 20%, rgba(240, 229, 208, 0.16) 20% 22%, transparent 22%),
    repeating-linear-gradient(180deg, rgba(240, 229, 208, 0.16) 0 2px, transparent 2px 15px);
  opacity: 0.7;
}

.image-panel.map::before {
  background:
    radial-gradient(circle at 28% 44%, rgba(77, 182, 172, 0.35) 0 7px, transparent 8px),
    radial-gradient(circle at 66% 30%, rgba(216, 176, 76, 0.34) 0 7px, transparent 8px),
    linear-gradient(132deg, transparent 0 38%, rgba(77, 182, 172, 0.24) 39% 41%, transparent 42%),
    linear-gradient(22deg, transparent 0 56%, rgba(217, 99, 30, 0.3) 57% 59%, transparent 60%);
}

.image-panel.timeline::before {
  background:
    linear-gradient(90deg, transparent 0 12%, rgba(217, 99, 30, 0.75) 12% 14%, transparent 14%),
    linear-gradient(90deg, transparent 0 44%, rgba(77, 182, 172, 0.75) 44% 46%, transparent 46%),
    linear-gradient(90deg, transparent 0 78%, rgba(216, 176, 76, 0.75) 78% 80%, transparent 80%),
    linear-gradient(180deg, transparent 0 55%, rgba(240, 229, 208, 0.22) 55% 58%, transparent 58%);
}

.phase-map {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.phase-node {
  min-height: 130px;
}

.metric-loop {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.metric-node {
  min-height: 132px;
}

.metric-node span {
  color: var(--accent-2);
}

.signal-pyramid {
  display: grid;
  gap: 8px;
  margin: 4px 0;
}

.signal-tier {
  margin: 0 auto;
  padding: 10px 12px;
  border: 1px solid var(--border-hairline);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  text-align: center;
  font-size: 0.9rem;
}

.signal-tier:nth-child(1) {
  width: 44%;
  border-color: rgba(217, 99, 30, 0.55);
}

.signal-tier:nth-child(2) {
  width: 62%;
  border-color: rgba(77, 182, 172, 0.45);
}

.signal-tier:nth-child(3) {
  width: 80%;
  border-color: rgba(216, 176, 76, 0.45);
}

.signal-tier:nth-child(4) {
  width: 100%;
}

.page-footer {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 28px 0 54px;
  border-top: 1px solid var(--border-hairline);
  color: var(--text-subtle);
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-copy {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

pre {
  max-width: 100%;
  overflow: auto;
  padding: 14px;
  border: 1px solid var(--border-hairline);
  border-radius: 8px;
  background: #0a0705;
  color: var(--text-muted);
  font-size: 0.84rem;
}

@media (max-width: 920px) {
  .topbar,
  .page-shell,
  .page-footer {
    width: min(100% - 32px, 760px);
  }

  .layout {
    display: block;
  }

  .toc {
    display: none;
  }

  .mobile-toc {
    display: block;
    margin: 0 0 24px;
    border: 1px solid var(--border-hairline);
    border-radius: 8px;
    background: var(--bg-elev);
  }

  .mobile-toc summary {
    padding: 13px 14px;
    color: var(--text);
    cursor: pointer;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }

  .mobile-toc .toc-list {
    padding: 0 12px 12px;
  }

  .chapter-grid {
    grid-template-columns: 1fr;
  }

  .source-card {
    grid-template-columns: 1fr;
  }

  .workflow-map,
  .phase-map,
  .metric-loop,
  .image-strip {
    grid-template-columns: 1fr;
  }

  .matrix-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .topbar {
    min-height: auto;
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .top-links {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
    padding-bottom: 2px;
  }

  .hero {
    margin-bottom: 24px;
  }

  .hero h1,
  .hero h1.long-title {
    font-size: clamp(38px, 14vw, 58px);
  }

  .hero h1.long-title {
    max-width: 100%;
    font-size: clamp(34px, 12vw, 48px);
  }

  .hero h1.narrow-title {
    max-width: 100%;
    font-size: clamp(30px, 9vw, 38px);
  }

  .subtitle {
    font-size: 18px;
  }

  .section {
    margin-top: 36px;
  }

  .callout,
  .chapter-card,
  .source-card,
  .component-card {
    padding: 15px;
  }

  .meta-chip {
    width: 100%;
    justify-content: center;
  }

  table {
    min-width: 560px;
  }

  .visual-figure {
    padding: 14px;
  }

  .flow-step,
  .bar-row {
    grid-template-columns: 1fr;
  }

  .signal-tier,
  .signal-tier:nth-child(1),
  .signal-tier:nth-child(2),
  .signal-tier:nth-child(3),
  .signal-tier:nth-child(4) {
    width: 100%;
  }
}

@media print {
  body {
    background: #fff;
    color: #111;
  }

  .site-header,
  .toc,
  .mobile-toc,
  .hero,
  .page-footer,
  .section:not(#checklist),
  .print-link {
    display: none !important;
  }

  .page-shell,
  .layout,
  .content,
  .section,
  .checklist-panel {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
    display: block;
  }

  .checklist-panel {
    border: 0;
    background: #fff;
    color: #111;
  }

  .checklist-panel summary {
    display: block;
    padding: 0 0 12px;
  }

  .checklist-content {
    padding: 0;
  }

  .checklist-content ol,
  .checklist-content ul {
    color: #111;
  }
}