:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-strong: #eef3f4;
  --ink: #20242b;
  --muted: #626b76;
  --line: #d7dce2;
  --accent: #1e7f75;
  --accent-strong: #145f58;
  --amber: #b46212;
  --blue: #365fa8;
  --shadow: 0 18px 50px rgb(25 32 44 / 8%);
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 20;
  transform: translateY(-150%);
  background: var(--ink);
  color: white;
  padding: 0.6rem 0.8rem;
  border-radius: 4px;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: flex-start;
  gap: 1.5rem;
  border-bottom: 1px solid rgb(215 220 226 / 84%);
  background: rgb(246 247 249 / 92%);
  padding: 0 32px;
  backdrop-filter: blur(16px);
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.topbar__brand strong {
  display: block;
  font-size: 1rem;
  line-height: 1.2;
}

.topbar__brand small {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.brand-mark {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent-strong);
  font-size: 0.83rem;
  font-weight: 800;
  box-shadow: 0 8px 22px rgb(25 32 44 / 7%);
}

.layout {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: 0;
  min-height: calc(100vh - 72px);
}

.sidebar {
  position: sticky;
  top: 72px;
  height: calc(100vh - 72px);
  border-right: 1px solid var(--line);
  padding: 32px 24px;
  overflow: auto;
}

.sidebar__eyebrow,
.section-kicker {
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.sidebar nav {
  display: grid;
  gap: 0.25rem;
  margin-top: 1rem;
}

.nav-link {
  border-left: 3px solid transparent;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 650;
  padding: 0.5rem 0.7rem;
  text-decoration: none;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.nav-link:hover,
.nav-link:focus,
.nav-link.is-active {
  border-color: var(--accent);
  background: rgb(255 255 255 / 72%);
  color: var(--ink);
  transform: translateX(2px);
}

.content {
  max-width: 1040px;
  width: 100%;
  padding: 56px 56px 88px;
}

.doc-section {
  border-bottom: 1px solid var(--line);
  padding: 40px 0 56px;
}

.doc-section:first-child {
  padding-top: 0;
}

.doc-section--last {
  border-bottom: 0;
}

h1,
h2 {
  max-width: 900px;
  margin: 0;
  color: var(--ink);
  line-height: 1.08;
}

h1 {
  font-size: clamp(2.15rem, 3.2vw, 3.6rem);
  font-weight: 760;
}

h2 {
  font-size: clamp(2rem, 3.4vw, 3.25rem);
  font-weight: 740;
}

.section-heading {
  margin-top: 2rem;
  font-size: clamp(1.35rem, 2vw, 1.7rem);
  line-height: 1.2;
}

p {
  max-width: 780px;
  margin: 1.15rem 0 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.lede {
  color: #3f4854;
  font-size: clamp(1.1rem, 2vw, 1.38rem);
}

.principles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.phase-map {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.decision-grid,
.stage-grid,
.workflow-groups {
  display: grid;
  gap: 1px;
  margin-top: 1.8rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

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

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

.decision-grid div,
.stage-grid div,
.workflow-groups div,
.mode-grid div {
  background: var(--surface);
  padding: 1.25rem;
}

.decision-grid span,
.stage-grid span,
.workflow-groups span {
  display: block;
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.decision-grid strong,
.stage-grid strong,
.mode-grid strong {
  display: block;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 780;
  margin-top: 0.2rem;
}

.decision-grid p,
.stage-grid p,
.mode-grid p {
  margin-top: 0.45rem;
  font-size: 0.92rem;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.workflow-groups ul {
  display: grid;
  gap: 0.35rem;
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
}

.workflow-groups li {
  color: #34404b;
  font-weight: 650;
}

.outcome-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.6rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.outcome-grid section {
  background: var(--surface);
  padding: 1.25rem;
}

.outcome-grid span,
.outcome-compare span {
  display: block;
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 820;
  text-transform: uppercase;
}

.outcome-grid h3 {
  margin: 0.25rem 0 0;
  color: var(--ink);
  font-size: 1.12rem;
  line-height: 1.2;
}

.outcome-grid p,
.outcome-compare p,
.outcome-list p {
  margin-top: 0.45rem;
  font-size: 0.94rem;
}

.outcome-compare {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.6rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.outcome-compare div,
.outcome-list div {
  background: var(--surface);
  padding: 1.25rem;
}

.outcome-compare strong,
.outcome-list strong {
  display: block;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 780;
  margin-top: 0.2rem;
}

.outcome-list {
  display: grid;
  gap: 1px;
  margin-top: 1.6rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.flow-diagram {
  display: grid;
  grid-template-columns:
    minmax(88px, 1fr) auto minmax(88px, 1fr) auto minmax(88px, 1fr) auto
    minmax(88px, 1fr) auto minmax(88px, 1fr) auto minmax(88px, 1fr) auto minmax(88px, 1fr);
  align-items: stretch;
  gap: 0.45rem;
  margin-top: 2rem;
}

.flow-node {
  display: grid;
  min-height: 92px;
  align-content: center;
  gap: 0.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.flow-node span,
.flow-detail-grid span,
.record-groups section > span {
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 820;
  text-transform: uppercase;
}

.flow-node strong,
.flow-detail-grid strong {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 780;
}

.flow-arrow {
  display: grid;
  place-items: center;
  color: var(--accent-strong);
  font-size: 1.4rem;
  font-weight: 720;
}

.flow-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.4rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.flow-detail-grid > div {
  background: var(--surface);
  padding: 1.2rem;
}

.flow-detail-grid p {
  margin-top: 0.45rem;
  font-size: 0.94rem;
}

.flow-detail-grid ul {
  display: grid;
  gap: 0.25rem;
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
}

.flow-detail-grid li {
  color: #34404b;
  font-size: 0.92rem;
  font-weight: 630;
}

.phase-index {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.6rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.phase-index a {
  display: grid;
  align-content: start;
  min-height: 150px;
  background: var(--surface);
  color: inherit;
  padding: 1.25rem;
  text-decoration: none;
  transition:
    background 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.phase-index a:hover,
.phase-index a:focus {
  background: #f8fbfb;
  color: var(--accent-strong);
  transform: translateY(-1px);
}

.phase-index span {
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 820;
}

.phase-index strong {
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 780;
  margin-top: 0.25rem;
}

.phase-index p {
  margin-top: 0.45rem;
  font-size: 0.94rem;
}

.lane-workflow {
  display: grid;
  gap: 1px;
  margin-top: 1.8rem;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.lane-workflow--three {
  grid-template-columns: repeat(3, minmax(190px, 1fr));
}

.lane-workflow--four {
  grid-template-columns: repeat(4, minmax(185px, 1fr));
}

.lane-workflow--five {
  grid-template-columns: repeat(5, minmax(165px, 1fr));
}

.lane-head {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #edf4f3;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 820;
  padding: 0.75rem 0.9rem;
  text-transform: uppercase;
}

.lane-cell {
  min-height: 92px;
  background: var(--surface);
  padding: 0.75rem;
}

.work-step {
  min-height: 68px;
  border: 1px solid rgb(30 127 117 / 28%);
  border-radius: 8px;
  background: #f7fbfa;
  color: #2d3b3c;
  display: grid;
  align-content: center;
  font-size: 0.9rem;
  font-weight: 680;
  line-height: 1.35;
  padding: 0.75rem;
}

.work-step--choice {
  border-color: rgb(180 98 18 / 36%);
  background: #fff8ef;
  color: #5d3f1d;
}

.phase-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.6rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.phase-summary section {
  background: var(--surface);
  padding: 1.25rem;
}

.phase-summary h2 {
  font-size: 1.15rem;
  line-height: 1.2;
}

.phase-summary ul {
  display: grid;
  gap: 0.35rem;
  margin: 0.8rem 0 0;
  padding-left: 1.1rem;
}

.phase-summary li {
  color: #34404b;
  font-size: 0.94rem;
  font-weight: 630;
}

.phase-summary p {
  margin-top: 0.8rem;
  font-size: 0.94rem;
}

.phase-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.phase-nav a {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 760;
  padding: 0.7rem 0.9rem;
  text-decoration: none;
  transition:
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.phase-nav a:hover,
.phase-nav a:focus {
  border-color: var(--accent);
  color: var(--accent-strong);
  transform: translateY(-1px);
}

.record-groups {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.8rem;
}

.record-groups section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.record-groups h2 {
  margin-top: 0.2rem;
  font-size: 1.28rem;
  line-height: 1.2;
}

.record-list {
  display: grid;
  gap: 1px;
  margin-top: 1rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.record-item {
  background: var(--surface);
}

.record-item summary {
  display: grid;
  grid-template-columns: minmax(150px, 0.28fr) minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  min-height: 66px;
  cursor: pointer;
  list-style: none;
  padding: 0.95rem 1rem;
}

.record-item summary::-webkit-details-marker {
  display: none;
}

.record-item summary::after {
  content: "+";
  display: inline-grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f7f9fa;
  color: var(--accent-strong);
  font-weight: 820;
}

.record-item[open] summary::after {
  content: "-";
  background: var(--accent);
  color: white;
}

.record-item summary:hover,
.record-item summary:focus {
  background: #f8fbfb;
  outline: none;
}

.record-name {
  color: var(--ink);
  font-weight: 780;
}

.record-summary {
  color: var(--muted);
}

.record-fields {
  display: grid;
  gap: 1px;
  border-top: 1px solid var(--line);
  background: var(--line);
}

.record-item:not([open]) .record-fields {
  display: none;
}

.record-fields div {
  display: grid;
  grid-template-columns: minmax(145px, 0.24fr) auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: start;
  background: #fbfcfd;
  padding: 0.82rem 1rem;
}

.record-fields span {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 760;
}

.record-fields b {
  min-width: 76px;
  border: 1px solid rgb(30 127 117 / 22%);
  border-radius: 999px;
  background: #eef6f4;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 780;
  line-height: 1.4;
  padding: 0.1rem 0.45rem;
  text-align: center;
}

.record-fields p {
  margin: 0;
  font-size: 0.9rem;
}

.record-groups dl {
  display: grid;
  gap: 1px;
  margin: 1rem 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.record-groups dl div {
  display: grid;
  grid-template-columns: minmax(150px, 0.28fr) minmax(0, 1fr);
  gap: 1rem;
  background: var(--surface);
  padding: 0.95rem 1rem;
}

.record-groups dt {
  color: var(--ink);
  font-weight: 780;
}

.record-groups dd {
  margin: 0;
  color: var(--muted);
}

.principles div,
.phase-map div,
.charter-field,
.system-flow div {
  background: var(--surface);
  padding: 1.25rem;
}

.principles span,
.phase-map span {
  display: block;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 800;
}

.principles strong,
.phase-map strong,
.charter-field span,
.system-flow strong {
  display: block;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 780;
}

.principles p,
.phase-map p,
.charter-field p,
.system-flow p {
  margin-top: 0.45rem;
  font-size: 0.92rem;
}

.next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.8rem;
}

.next-links a {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 760;
  padding: 0.7rem 0.9rem;
  text-decoration: none;
  transition:
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.next-links a:hover,
.next-links a:focus {
  border-color: var(--accent);
  color: var(--accent-strong);
  transform: translateY(-1px);
}

.charter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.6rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.note {
  max-width: 780px;
  margin-top: 1.4rem;
  border-left: 4px solid var(--accent);
  background: var(--surface-strong);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: #39424d;
  padding: 1rem 1.15rem;
}

.note strong {
  color: var(--accent-strong);
}

.role-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.5rem;
}

.role-list button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.45rem 0.75rem;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.role-list button:hover,
.role-list button:focus,
.role-list button.is-selected {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
  transform: translateY(-1px);
}

.detail-panel {
  min-height: 82px;
  border-left: 4px solid var(--blue);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow);
  color: #35404c;
  padding: 1rem 1.1rem;
}

.object-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.4rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.object-columns ul {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  background: var(--surface);
  list-style: none;
  padding: 1.15rem;
}

.object-columns li {
  color: #2f3741;
  font-weight: 680;
}

.system-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.6rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.system-flow span {
  display: block;
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 760;
  margin-top: 0.25rem;
}

.az-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 1.5rem;
}

.az-index a,
.az-index span {
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 780;
  text-decoration: none;
}

.az-index a:hover,
.az-index a:focus {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.az-index span {
  background: #eef0f2;
  color: #9aa2ad;
  cursor: not-allowed;
}

.glossary-alpha {
  display: grid;
  gap: 2rem;
  margin-top: 2.2rem;
}

.glossary-letter {
  scroll-margin-top: 92px;
}

.glossary-letter h2 {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent-strong);
  font-size: 1.25rem;
  font-weight: 820;
}

.glossary-list {
  display: grid;
  gap: 1px;
  margin: 1rem 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.glossary-list div {
  display: grid;
  grid-template-columns: minmax(160px, 0.32fr) minmax(0, 1fr);
  gap: 1rem;
  background: var(--surface);
  padding: 1rem 1.15rem;
}

.glossary-list dt {
  color: var(--ink);
  font-weight: 780;
}

.glossary-list dt span {
  display: inline-block;
  margin-left: 0.5rem;
  border: 1px solid rgb(30 127 117 / 24%);
  border-radius: 999px;
  background: #eef6f4;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 760;
  line-height: 1.4;
  padding: 0.1rem 0.45rem;
  vertical-align: 0.08rem;
}

.glossary-list dd {
  margin: 0;
  color: var(--muted);
}

.glossary-list code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

@media (max-width: 900px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 20px;
  }

  .layout {
    display: block;
  }

  .sidebar {
    position: static;
    height: auto;
    border-bottom: 1px solid var(--line);
    border-right: 0;
    padding: 18px 20px;
  }

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

  .content {
    padding: 34px 20px 64px;
  }

  .principles,
  .phase-map,
  .flow-diagram,
  .flow-detail-grid,
  .phase-index,
  .phase-summary,
  .outcome-grid,
  .outcome-compare,
  .system-flow,
  .decision-grid,
  .stage-grid,
  .workflow-groups,
  .mode-grid {
    grid-template-columns: 1fr;
  }

  .flow-diagram {
    gap: 0.6rem;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }

  .charter-grid,
  .object-columns,
  .record-groups dl div,
  .record-item summary,
  .record-fields div,
  .glossary-list div {
    grid-template-columns: 1fr;
  }

}

@media (max-width: 520px) {
  .sidebar nav {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.85rem;
  }
}