:root {
  --page-bg: #f6f8fb;
  --surface: #ffffff;
  --surface-soft: #edf2f7;
  --ink: #202124;
  --muted: #596273;
  --line: #d7dee8;
  --teal: #0f766e;
  --teal-soft: #d9f2ee;
  --amber: #a16207;
  --amber-soft: #f8e7c4;
  --green: #2f7a4f;
  --green-soft: #dff1e6;
  --red: #a34135;
  --red-soft: #f3dcd8;
  --blue: #2d638f;
  --blue-soft: #dce9f2;
  --shadow: 0 18px 48px rgba(32, 33, 36, 0.08);
  --radius: 8px;
  --space-1: 0.35rem;
  --space-2: 0.65rem;
  --space-3: 1rem;
  --space-4: 1.35rem;
  --space-5: 1.8rem;
  --space-6: 2.4rem;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--page-bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.45;
}

body {
  margin: 0;
  min-width: 320px;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

code {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  overflow-wrap: anywhere;
  padding: 0.08rem 0.28rem;
  white-space: normal;
  word-break: break-word;
}

.topbar {
  align-items: end;
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 1fr) auto;
  margin: 0 auto;
  max-width: 1440px;
  padding: var(--space-6) var(--space-5) var(--space-4);
}

.eyebrow {
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  margin: 0 0 var(--space-2);
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 4.1rem);
  letter-spacing: 0;
  line-height: 1.02;
  margin-bottom: var(--space-3);
  max-width: 980px;
}

h2 {
  font-size: 1.25rem;
  letter-spacing: 0;
  line-height: 1.2;
  margin-bottom: var(--space-2);
}

h3 {
  font-size: 1rem;
  letter-spacing: 0;
  margin-bottom: var(--space-2);
}

.intro {
  color: var(--muted);
  font-size: 1.03rem;
  margin: 0;
  max-width: 850px;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: end;
  max-width: 380px;
}

.status-strip span,
.pill {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  display: inline-flex;
  font-size: 0.78rem;
  font-weight: 700;
  gap: 0.35rem;
  min-height: 2rem;
  padding: 0.36rem 0.7rem;
}

.app-shell {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 360px minmax(0, 1fr);
  margin: 0 auto;
  max-width: 1440px;
  padding: 0 var(--space-5) var(--space-6);
}

.control-panel,
.workspace {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.control-panel {
  align-self: start;
  max-height: calc(100vh - 2rem);
  overflow: auto;
  position: sticky;
  top: var(--space-3);
}

.panel-heading {
  border-bottom: 1px solid var(--line);
  padding: var(--space-4);
}

.panel-heading p,
.stage-summary,
.muted {
  color: var(--muted);
}

.stage-nav {
  display: grid;
  gap: 0;
}

.stage-button {
  align-items: start;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  display: grid;
  gap: var(--space-2);
  grid-template-columns: 2.4rem minmax(0, 1fr);
  min-height: 4.7rem;
  padding: var(--space-3) var(--space-4);
  text-align: left;
  width: 100%;
}

.stage-button:hover,
.stage-button:focus-visible {
  background: var(--surface-soft);
}

.stage-button.is-active {
  background: var(--teal-soft);
  border-left: 5px solid var(--teal);
  padding-left: calc(var(--space-4) - 5px);
}

.stage-number {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--teal);
  display: inline-flex;
  font-weight: 800;
  height: 2rem;
  justify-content: center;
  width: 2rem;
}

.stage-button strong {
  display: block;
  font-size: 0.96rem;
  line-height: 1.2;
  margin-bottom: 0.2rem;
}

.stage-button span:last-child {
  color: var(--muted);
  display: block;
  font-size: 0.82rem;
}

.workspace {
  min-height: 720px;
  overflow: hidden;
}

.view-tabs {
  background: var(--surface-soft);
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-3);
}

.view-tab,
.primary-action,
.small-action {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-weight: 800;
  min-height: 2.4rem;
  padding: 0.55rem 0.95rem;
}

.view-tab.is-active,
.primary-action {
  background: var(--teal);
  border-color: var(--teal);
  color: #ffffff;
}

.view-tab:focus-visible,
.primary-action:focus-visible,
.small-action:focus-visible,
.stage-button:focus-visible,
.search-input:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
}

#contentRoot {
  padding: var(--space-5);
}

.notice {
  margin: var(--space-5);
  padding: var(--space-4);
}

.notice-error {
  background: var(--red-soft);
  border: 1px solid #d7aaa2;
  border-radius: var(--radius);
}

.hero-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
}

.stage-card,
.info-band,
.metric-card,
.gate-card,
.check-row,
.glossary-item,
.register-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.stage-card {
  padding: var(--space-5);
}

.stage-card h2 {
  font-size: clamp(1.55rem, 3vw, 2.4rem);
  line-height: 1.08;
}

.plain-line {
  background: var(--teal-soft);
  border-left: 5px solid var(--teal);
  border-radius: 5px;
  font-size: 1.05rem;
  margin: var(--space-4) 0;
  padding: var(--space-3);
}

.formula-box {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-top: var(--space-4);
  padding: var(--space-3);
}

.formula-box p {
  margin-bottom: 0;
  overflow-wrap: anywhere;
}

.stage-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.stage-meta .pill:nth-child(2n) {
  background: var(--blue-soft);
}

.info-band {
  background: var(--surface-soft);
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4);
}

.info-band p {
  margin-bottom: 0;
}

.section-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: var(--space-4);
}

.list-panel {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.list-panel ul {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding-left: 1.2rem;
}

.metric-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.metric-chip {
  background: var(--blue-soft);
  border: 1px solid #b9cfe0;
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.83rem;
  font-weight: 800;
  padding: 0.42rem 0.72rem;
}

.metric-chip.is-required {
  background: var(--amber-soft);
  border-color: #dfc08d;
}

.catalog-count {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-weight: 800;
  margin-bottom: var(--space-4);
  padding: var(--space-3);
}

.metric-toolbar {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.metric-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: end;
}

.search-input {
  border: 1px solid var(--line);
  border-radius: 999px;
  min-height: 2.6rem;
  min-width: min(100%, 320px);
  padding: 0.55rem 0.9rem;
}

.metrics-grid,
.gates-grid,
.glossary-grid,
.register-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.metric-card,
.gate-card,
.glossary-item,
.register-card {
  padding: var(--space-4);
}

.metric-card header,
.gate-card header {
  align-items: start;
  display: flex;
  gap: var(--space-3);
  justify-content: space-between;
}

.source-label {
  background: var(--green-soft);
  border: 1px solid #b9d2c0;
  border-radius: 999px;
  color: #244c31;
  flex: 0 0 auto;
  font-size: 0.74rem;
  font-weight: 800;
  padding: 0.28rem 0.55rem;
}

.metric-card details,
.gate-card details {
  margin-top: var(--space-3);
}

.metric-card summary,
.gate-card summary {
  color: var(--teal);
  font-weight: 800;
}

.definition-list {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-3) 0 0;
}

.definition-list div {
  border-top: 1px solid var(--line);
  display: grid;
  gap: var(--space-2);
  grid-template-columns: 9.5rem minmax(0, 1fr);
  padding-top: var(--space-2);
}

.definition-list dt {
  color: var(--muted);
  font-weight: 800;
}

.definition-list dd {
  margin: 0;
}

.definition-list ul {
  margin: 0;
  padding-left: 1.1rem;
}

.compact-definition {
  display: grid;
  gap: var(--space-2);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: var(--space-3) 0;
}

.compact-definition div {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: var(--space-2);
}

.compact-definition dt {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.compact-definition dd {
  margin: 0.15rem 0 0;
  overflow-wrap: anywhere;
}

.submetric-card {
  border-top: 5px solid var(--blue);
}

.submetric-card details[open] {
  border-top: 1px solid var(--line);
  padding-top: var(--space-3);
}

.stage-timeline {
  display: grid;
  gap: var(--space-3);
}

.flow-panel {
  margin-top: var(--space-4);
}

.flow-steps,
.checklist-list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding-left: 1.3rem;
}

.process-grid,
.pages-surface-grid,
.state-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.process-card,
.surface-card,
.state-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.process-card header {
  align-items: center;
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 3rem minmax(0, 1fr);
  margin-bottom: var(--space-3);
}

.process-number {
  align-items: center;
  background: var(--teal-soft);
  border: 1px solid #a9d6cf;
  border-radius: 999px;
  color: var(--teal);
  display: inline-flex;
  font-weight: 900;
  height: 2.5rem;
  justify-content: center;
  width: 2.5rem;
}

.process-meta {
  display: grid;
  gap: var(--space-2);
  margin: 0;
}

.process-meta div {
  border-top: 1px solid var(--line);
  padding-top: var(--space-2);
}

.process-meta dt {
  color: var(--teal);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.process-meta dd {
  color: var(--muted);
  margin: 0.15rem 0 0;
}

.surface-card {
  border-top: 5px solid var(--blue);
}

.surface-card:nth-child(2) {
  border-top-color: var(--teal);
}

.surface-card .definition-list div {
  grid-template-columns: 1fr;
}

.surface-card .metric-links {
  display: grid;
  grid-template-columns: 1fr;
}

.surface-card .metric-chip {
  border-radius: 6px;
  display: block;
  line-height: 1.25;
  overflow-wrap: anywhere;
  white-space: normal;
}

.inline-link {
  color: var(--teal);
  font-weight: 800;
  overflow-wrap: anywhere;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2rem;
}

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

.state-card {
  min-height: 8rem;
}

.state-card p {
  color: var(--muted);
  margin-bottom: 0;
}

.comparison-table {
  border-collapse: collapse;
  width: 100%;
}

.comparison-table th,
.comparison-table td {
  border-bottom: 1px solid var(--line);
  padding: var(--space-2);
  text-align: left;
  vertical-align: top;
}

.comparison-table th {
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
}

.brake-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.brake-item {
  border-left: 4px solid var(--teal);
  padding-left: var(--space-3);
}

.brake-item p {
  color: var(--muted);
  margin-bottom: 0;
}

.stacked-heading {
  margin-top: var(--space-4);
}

.register-card h4 {
  font-size: 0.85rem;
  margin: var(--space-3) 0 var(--space-2);
  text-transform: uppercase;
}

.register-card p {
  color: var(--muted);
}

.column-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.column-chip {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
  overflow-wrap: anywhere;
  padding: 0.38rem 0.55rem;
}

.gate-card.is-hard {
  border-left: 5px solid var(--red);
}

.gate-card.is-quality {
  border-left: 5px solid var(--amber);
}

.gate-card.is-proof {
  border-left: 5px solid var(--green);
}

.checklist {
  display: grid;
  gap: var(--space-3);
}

.check-row {
  align-items: start;
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 2.2rem minmax(0, 1fr);
  padding: var(--space-3);
}

.check-box {
  align-items: center;
  background: var(--green-soft);
  border: 1px solid #b9d2c0;
  border-radius: 6px;
  color: var(--green);
  display: inline-flex;
  font-weight: 900;
  height: 2rem;
  justify-content: center;
  width: 2rem;
}

.footer-note {
  border-top: 1px solid var(--line);
  color: var(--muted);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
}

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

  .status-strip {
    justify-content: start;
  }

  .control-panel {
    max-height: none;
    position: static;
  }

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

  .hero-grid,
  .section-grid,
  .metrics-grid,
  .gates-grid,
  .glossary-grid,
  .register-grid,
  .process-grid,
  .pages-surface-grid,
  .state-grid,
  .brake-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .topbar,
  .app-shell {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }

  #contentRoot {
    padding: var(--space-3);
  }

  .stage-nav {
    grid-template-columns: 1fr;
  }

  .stage-button {
    min-height: 4.2rem;
  }

  .definition-list div {
    grid-template-columns: 1fr;
  }

  .compact-definition {
    grid-template-columns: 1fr;
  }

  .metric-card header,
  .gate-card header {
    display: grid;
  }

  .metric-actions {
    justify-content: start;
    width: 100%;
  }
}