:root {
  color-scheme: dark;
  --bg: #111412;
  --surface: #171b18;
  --surface-2: #1d221e;
  --line: #303731;
  --line-soft: #262c27;
  --text: #f0f2ed;
  --muted: #9ba59c;
  --faint: #6f7871;
  --accent: #d79952;
  --accent-soft: #2f251b;
  --power: #df884c;
  --logic: #55bad1;
  --signal: #b08bd7;
  --can-h: #69b982;
  --can-l: #d1bd59;
  --danger: #e07867;
  --success: #78bd8c;
  --sidebar: 220px;
  --topbar: 76px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar) + 24px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-150%);
}

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

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--topbar);
  display: grid;
  grid-template-columns: var(--sidebar) minmax(260px, 1fr) auto;
  align-items: center;
  gap: 28px;
  padding: 0 32px 0 24px;
  background: rgba(17, 20, 18, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 14px;
  letter-spacing: -0.01em;
}

.brand small {
  color: var(--muted);
  font-size: 11px;
}

.topbar-progress {
  display: flex;
  align-items: center;
  justify-self: center;
  gap: 14px;
  width: min(520px, 100%);
  color: var(--muted);
  font-size: 12px;
}

.topbar-progress strong {
  color: var(--text);
}

.progress-track {
  flex: 1;
  height: 3px;
  overflow: hidden;
  background: var(--line);
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  transition: width 260ms ease;
}

.quiet-button {
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}

.quiet-button:hover,
.quiet-button:focus-visible {
  background: var(--surface-2);
  border-color: var(--accent);
  outline: none;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar-actions a.quiet-button {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  padding-top: var(--topbar);
}

.sidebar {
  position: fixed;
  inset: var(--topbar) auto 0 0;
  width: var(--sidebar);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 34px 22px 24px;
  border-right: 1px solid var(--line);
  background: var(--bg);
}

.sidebar nav {
  display: grid;
  gap: 2px;
}

.sidebar nav a {
  display: flex;
  gap: 12px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.sidebar nav a span {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
}

.sidebar nav a:hover,
.sidebar nav a.active {
  color: var(--text);
  border-left-color: var(--accent);
  background: var(--surface);
}

.sidebar-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 10px 0;
  border-top: 1px solid var(--line-soft);
}

.sidebar-note p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

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

.sidebar-deep-link {
  display: block;
  margin-top: 8px;
  color: var(--accent);
  font-size: 10px;
  text-decoration: none;
}

.sidebar-deep-link:hover,
.sidebar-deep-link:focus-visible {
  text-decoration: underline;
  outline: none;
}

.status-dot {
  width: 8px;
  height: 8px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(120, 189, 140, 0.1);
}

.status-dot.status-planned {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(215, 153, 82, 0.1);
}

main {
  grid-column: 2;
  width: min(1420px, 100%);
  margin: 0 auto;
  padding: 0 68px;
}

.intro {
  padding: 82px 0 86px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.intro > .eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
}

.intro > .eyebrow span {
  padding: 5px 8px;
  border: 1px solid rgba(215, 153, 82, 0.55);
  background: var(--accent-soft);
}

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

h1 {
  max-width: 940px;
  margin-bottom: 22px;
  font-size: clamp(42px, 5vw, 72px);
  font-weight: 720;
  letter-spacing: -0.065em;
  line-height: 0.96;
}

h1 em {
  color: var(--accent);
  font-family: var(--sans);
  font-weight: 400;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(32px, 3.5vw, 48px);
  font-weight: 690;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

h3 {
  margin-bottom: 8px;
  font-size: 18px;
  line-height: 1.25;
}

.lede {
  max-width: 780px;
  margin-bottom: 42px;
  color: #bdc5bd;
  font-size: clamp(17px, 2vw, 21px);
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0 0 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.facts div {
  padding: 20px 22px;
  border-right: 1px solid var(--line);
}

.facts div:first-child {
  padding-left: 0;
}

.facts div:last-child {
  border-right: 0;
}

.facts small,
.facts strong {
  display: block;
}

.facts small {
  margin-bottom: 7px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.facts strong {
  font-size: 14px;
}

.safety-banner {
  display: flex;
  gap: 14px;
  margin: 28px 0 34px;
  padding: 18px 20px;
  border: 1px solid rgba(224, 120, 103, 0.46);
  border-left-width: 4px;
  background: #211918;
}

.safety-banner svg {
  flex: 0 0 25px;
  width: 25px;
  height: 25px;
  fill: none;
  stroke: var(--danger);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.safety-banner p {
  margin: 0;
  color: #c9b9b5;
  font-size: 13px;
}

.safety-banner strong {
  color: #f3dbd5;
}

.diagram-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  background-color: var(--surface);
}

.diagram-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(23, 27, 24, 0.94);
}

.diagram-toolbar small,
.diagram-toolbar strong {
  display: block;
}

.diagram-toolbar small {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.diagram-toolbar strong {
  font-size: 12px;
}

.wire-filters,
.part-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.wire-filters button,
.part-filters button {
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
}

.wire-filters button:hover,
.wire-filters button:focus-visible,
.wire-filters button.active,
.part-filters button:hover,
.part-filters button:focus-visible,
.part-filters button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
  outline: none;
}

.svg-scroll {
  overflow-x: auto;
}

.system-map {
  display: block;
  min-width: 1180px;
  width: 100%;
  height: auto;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 24px 24px;
}

.room-zones rect {
  fill: rgba(255, 255, 255, 0.012);
  stroke: #394039;
  stroke-dasharray: 6 7;
  stroke-width: 1;
}

.infrastructure-link path {
  fill: none;
  stroke: #778178;
  stroke-dasharray: 5 5;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.system-map .schematic-node rect {
  fill: #151916;
  stroke: #3b433c;
  stroke-width: 1;
}

.system-map .schematic-node rect.primary-node {
  fill: #1d211d;
  stroke: var(--accent);
  stroke-width: 1.3;
}

.zone-label,
.node-kicker,
.node-copy,
.node-title {
  font-family: var(--sans);
}

.zone-label,
.node-kicker {
  fill: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.node-title {
  fill: var(--text);
  font-size: 14px;
  font-weight: 650;
}

.node-title.large {
  font-size: 24px;
}

.node-title.compact {
  font-size: 11px;
}

.node-copy {
  fill: var(--muted);
  font-size: 11px;
}

.node-output {
  fill: #b8c1b9;
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.room-zone-title,
.room-zone-copy {
  font-family: var(--mono);
  font-weight: 700;
}

.room-zone-title {
  fill: var(--text);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.room-zone-copy {
  fill: var(--faint);
  font-size: 8px;
  letter-spacing: 0.06em;
}

.bus-label,
.map-note,
.port-caption {
  font-family: var(--mono);
}

.bus-label {
  fill: var(--faint);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.power-label { fill: var(--power); }
.can-label { fill: var(--can-h); }

.map-note {
  fill: var(--faint);
  font-size: 9px;
}

.port-caption {
  fill: var(--faint);
  font-size: 8px;
  letter-spacing: 0.06em;
}

.port-caption.right {
  text-anchor: end;
}

.port.power { fill: var(--power); }
.port.logic { fill: var(--logic); }
.port.signal { fill: var(--signal); }
.port.can { fill: var(--can-h); }
.port.can-low { fill: var(--can-l); }

.wire path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.2;
  vector-effect: non-scaling-stroke;
  transition: opacity 180ms ease, stroke-width 180ms ease;
}

.wire-power path { stroke: var(--power); }
.wire-logic path { stroke: var(--logic); }
.wire-signal path { stroke: var(--signal); }
.wire-can path { stroke: var(--can-h); }
.wire-can .can-low { stroke: var(--can-l); }
.wire-can .terminator-mark { stroke: var(--can-l); }
.system-map.filtering .wire { opacity: 0.13; }
.system-map.filtering .wire.selected { opacity: 1; }
.system-map.filtering .wire.selected path { stroke-width: 3.4; }

.map-terminator rect {
  fill: var(--bg);
  stroke: var(--accent);
  stroke-width: 1;
}

.map-terminator text {
  fill: var(--accent);
  font-family: var(--mono);
  font-size: 7px;
  font-weight: 700;
}

.map-terminator text:last-child {
  font-size: 10px;
}

.sensor-node rect {
  fill: #121613;
  stroke: #4a3c50;
  stroke-width: 1;
}

.sensor-kicker,
.sensor-title,
.sensor-copy,
.sensor-callouts text {
  font-family: var(--mono);
}

.sensor-kicker {
  fill: var(--signal);
  font-size: 6px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.sensor-title {
  fill: var(--text);
  font-size: 9px;
  font-weight: 700;
}

.sensor-copy {
  fill: var(--faint);
  font-size: 7px;
}

.sensor-callouts text {
  fill: var(--faint);
  font-size: 8px;
}

.sensor-callouts text:first-child,
.sensor-callouts text:nth-child(3) {
  fill: var(--signal);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.control-stack {
  display: grid;
  justify-items: center;
  padding: 34px;
  border: 1px solid var(--line);
  background-color: var(--surface);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 24px 24px;
}

.control-tier {
  width: min(680px, 100%);
  padding: 21px 24px;
  border: 1px solid var(--line);
  background: #151916;
  text-align: center;
}

.control-tier span,
.control-tier strong,
.control-tier p {
  display: block;
}

.control-tier span,
.node-tier span,
.architecture-contract small {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.control-tier strong {
  margin: 5px 0;
  font-size: 17px;
}

.control-tier p,
.node-tier p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.server-tier {
  border-color: var(--accent);
  box-shadow: inset 3px 0 var(--accent);
}

.gateway-tier {
  width: min(520px, 90%);
  border-color: rgba(85, 186, 209, 0.55);
}

.control-connector {
  position: relative;
  height: 72px;
  width: 2px;
  background: var(--logic);
}

.control-connector::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: -4px;
  border-top: 7px solid var(--logic);
  border-right: 5px solid transparent;
  border-left: 5px solid transparent;
}

.control-connector span {
  position: absolute;
  top: 50%;
  left: 17px;
  color: var(--logic);
  font-family: var(--mono);
  font-size: 9px;
  white-space: nowrap;
  transform: translateY(-50%);
}

.can-connector {
  background: var(--can-h);
}

.can-connector::after {
  border-top-color: var(--can-h);
}

.can-connector span {
  color: var(--can-h);
}

.node-tier {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: 100%;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.node-tier > div {
  min-height: 122px;
  padding: 23px 24px;
  border-right: 1px solid var(--line);
  background: rgba(21, 25, 22, 0.9);
}

.node-tier > div:last-child {
  border-right: 0;
}

.node-tier strong {
  display: block;
  margin: 8px 0 5px;
  font-size: 14px;
}

.responsibility-rule {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 34px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.responsibility-rule > div {
  padding: 26px 28px;
  border-right: 1px solid var(--line);
}

.responsibility-rule > div:last-child {
  border-right: 0;
}

.responsibility-rule h3 {
  font-size: 16px;
}

.responsibility-rule p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 12px;
}

.responsibility-rule .safety-rule {
  box-shadow: inset 0 2px rgba(224, 120, 103, 0.7);
}

.signal-journey {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 0;
  margin: 48px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.signal-journey li {
  min-height: 178px;
  padding: 24px 22px;
  border-right: 1px solid var(--line);
}

.signal-journey li:last-child {
  border-right: 0;
}

.signal-journey li > span {
  display: block;
  margin-bottom: 24px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
}

.signal-journey strong {
  font-size: 13px;
}

.signal-journey p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.architecture-contract {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  align-items: center;
  gap: 28px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.architecture-contract small,
.architecture-contract code {
  display: block;
}

.architecture-contract code {
  margin-top: 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.architecture-contract a {
  color: var(--accent);
  font-size: 12px;
  text-decoration: none;
  white-space: nowrap;
}

.architecture-contract a:hover,
.architecture-contract a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.guide-section {
  position: relative;
  padding: 104px 0;
  border-bottom: 1px solid var(--line);
}

.section-number {
  position: absolute;
  top: 112px;
  left: 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
}

.section-heading {
  max-width: 760px;
  margin: 0 0 46px 72px;
}

.section-heading > p:last-child {
  max-width: 700px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
  gap: 48px;
}

.check-panel,
.missing-panel {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.task {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
  cursor: pointer;
}

.task input {
  appearance: none;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  border: 1px solid #59635b;
  border-radius: 3px;
  background: var(--bg);
  cursor: pointer;
}

.task input:checked {
  border-color: var(--success);
  background: var(--success);
  box-shadow: inset 0 0 0 4px var(--bg);
}

.task input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.task span,
.task strong,
.task small {
  display: block;
}

.task strong {
  font-size: 14px;
}

.task small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.task:has(input:checked) strong,
.task:has(input:checked) small {
  color: var(--faint);
  text-decoration: line-through;
}

.plain-list {
  padding: 0;
  margin: 0;
  list-style: none;
}

.plain-list li {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.plain-list strong,
.plain-list small {
  display: block;
}

.plain-list strong {
  font-size: 14px;
}

.plain-list small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.part-icon {
  position: relative;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.part-icon.cable::before,
.part-icon.cable::after {
  content: "";
  position: absolute;
  left: 5px;
  width: 26px;
  height: 2px;
  transform: rotate(-34deg);
  transform-origin: left center;
}

.part-icon.cable::before {
  top: 24px;
  background: var(--can-h);
}

.part-icon.cable::after {
  top: 29px;
  background: var(--can-l);
}

.part-icon.fuse {
  position: relative;
}

.part-icon.fuse::after {
  content: "";
  position: absolute;
  inset: 8px 11px;
  border: 2px solid var(--power);
  border-bottom-width: 5px;
}

.part-icon.tool {
  position: relative;
}

.part-icon.tool::after {
  content: "+";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 21px;
}

.part-icon.air::before {
  content: "≈";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--logic);
  font-family: var(--mono);
  font-size: 23px;
  transform: rotate(-12deg);
}

.part-icon.tray::before {
  content: "";
  position: absolute;
  inset: 7px;
  background:
    linear-gradient(var(--line) 0 0) 50% 0 / 1px 100% no-repeat,
    linear-gradient(var(--line) 0 0) 0 50% / 100% 1px no-repeat;
  border: 1px solid var(--accent);
}

.connector-answer {
  margin-top: 20px;
  padding: 16px 18px;
  border-left: 3px solid var(--can-h);
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
}

.connector-answer strong {
  color: var(--text);
}

.bench-plan {
  margin-top: 54px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.bench-plan-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  padding: 22px 0;
}

.bench-plan-heading .eyebrow {
  margin-bottom: 7px;
}

.bench-plan-heading h3 {
  margin: 0;
  font-size: 23px;
}

.bench-plan-heading > span {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.bench-zones {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.bench-zone {
  position: relative;
  min-height: 220px;
  padding: 28px 26px 24px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(29, 34, 30, 0.66), transparent 84%);
}

.bench-zone:last-child {
  border-right: 0;
}

.bench-zone-index,
.bench-zone small,
.bench-zone strong,
.bench-zone em {
  display: block;
}

.bench-zone-index {
  position: absolute;
  top: 27px;
  right: 24px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
}

.bench-zone small {
  margin-bottom: 22px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.bench-zone strong {
  max-width: 250px;
  font-size: 16px;
}

.bench-zone p {
  margin: 8px 0 18px;
  color: var(--muted);
  font-size: 12px;
}

.bench-zone em {
  color: var(--faint);
  font-size: 11px;
  font-style: normal;
}

.hot-zone { box-shadow: inset 0 2px var(--power); }
.assembly-zone { box-shadow: inset 0 2px var(--accent); }
.test-zone { box-shadow: inset 0 2px var(--logic); }

.bench-checks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.bench-checks .task {
  padding: 18px 24px;
  border-right: 1px solid var(--line);
  border-bottom: 0;
}

.bench-checks .task:last-child {
  border-right: 0;
}

.power-diagram {
  padding: 34px;
}

.power-flow {
  display: grid;
  grid-template-columns: 1fr 82px 1fr 82px 1.1fr minmax(160px, 0.8fr);
  align-items: center;
  min-width: 940px;
}

.power-diagram {
  overflow-x: auto;
}

.power-block {
  position: relative;
  min-height: 156px;
  padding: 28px 22px 20px;
  border: 1px solid var(--line);
  background: #151916;
}

.power-block.focus-block {
  border-color: var(--power);
}

.power-block small,
.power-block strong,
.power-block em {
  display: block;
}

.power-block small {
  margin-bottom: 14px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
}

.power-block strong {
  margin-bottom: 8px;
  font-size: 15px;
}

.power-block em {
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
}

.block-index {
  position: absolute;
  top: 8px;
  right: 10px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
}

.flow-arrow {
  position: relative;
  height: 2px;
  background: currentColor;
  color: var(--power);
}

.flow-arrow::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -4px;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid currentColor;
}

.flow-arrow span {
  position: absolute;
  left: 50%;
  bottom: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  transform: translateX(-50%);
  white-space: nowrap;
}

.branch-stack {
  display: grid;
  gap: 7px;
}

.branch {
  padding: 7px 10px;
  border-left: 2px solid currentColor;
  background: #151916;
  color: var(--power);
  font-size: 11px;
}

.branch span {
  display: inline-block;
  width: 25px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
}

.branch.logic-line { color: var(--logic); }
.branch.muted { color: var(--faint); }

.build-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.44fr);
  gap: 48px;
  margin-top: 34px;
}

.technical-note {
  align-self: start;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.technical-note > strong {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
}

.technical-note p:not(.eyebrow) {
  color: var(--muted);
  font-size: 12px;
}

.technical-note p:last-child {
  margin-bottom: 0;
}

.mono {
  font-family: var(--mono);
  font-size: 10px !important;
}

.pin-layout {
  display: grid;
  grid-template-columns: minmax(540px, 0.86fr) minmax(420px, 1fr);
  gap: 54px;
  align-items: center;
}

.board-visual {
  position: relative;
  width: 270px;
  height: 520px;
  margin: 20px auto;
  padding: 62px 26px;
  border: 2px solid #486251;
  border-radius: 18px;
  background-color: #1c3023;
  box-shadow: inset 0 0 0 8px #15241a, 0 20px 60px rgba(0, 0, 0, 0.3);
  text-align: center;
}

.board-visual::before,
.board-visual::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 72px;
  background: #777d78;
  transform: translateX(-50%);
}

.board-visual::before {
  top: 85px;
  height: 82px;
  border: 1px solid #a6aaa6;
}

.board-visual::after {
  bottom: 54px;
  height: 28px;
  border-radius: 3px 3px 8px 8px;
}

.board-usb {
  position: absolute;
  bottom: 11px;
  left: 50%;
  z-index: 1;
  width: 50px;
  height: 20px;
  border: 1px solid #b5bbb6;
  border-radius: 5px 5px 2px 2px;
  background: #8b918c;
  color: #242724;
  font-family: var(--mono);
  font-size: 7px;
  line-height: 18px;
  transform: translateX(-50%);
}

.board-title,
.board-visual > small {
  position: relative;
  z-index: 1;
  display: block;
}

.board-title {
  margin-top: 136px;
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 800;
}

.board-visual > small {
  color: #90a796;
  font-size: 10px;
}

.pin {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  width: 230px;
  color: var(--muted);
  font-size: 10px;
  white-space: nowrap;
}

.pin::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 20px;
  height: 1px;
  background: var(--signal);
}

.pin span {
  padding: 3px 5px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 9px;
}

.pin b {
  font-weight: 500;
}

.pin-left {
  right: calc(100% + 16px);
  justify-content: flex-end;
}

.pin-left::after {
  right: -20px;
}

.pin-right {
  left: calc(100% + 16px);
}

.pin-right::after {
  left: -20px;
}

.pin.p1 { top: 52px; }
.pin.p2 { top: 112px; }
.pin.p3 { top: 172px; }
.pin.p4 { top: 232px; }
.pin.p5 { top: 292px; }
.pin.p6 { top: 352px; }

.pin-copy {
  min-width: 0;
}

.copy-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.pin-copy table,
.parts-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.pin-copy th,
.pin-copy td,
.parts-table th,
.parts-table td {
  padding: 13px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.pin-copy th,
.parts-table th {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pin-copy td {
  color: var(--muted);
  font-size: 11px;
}

.pin-copy td:first-child,
.pin-copy td:nth-child(2) {
  color: var(--text);
}

.pin-copy td:nth-child(2) {
  font-family: var(--mono);
  font-size: 10px;
}

.board-warning {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--danger);
  color: var(--muted);
  font-size: 12px;
}

.board-warning strong {
  color: var(--text);
}

.node-checks {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.node-checks .task {
  border-top: 1px solid var(--line);
}

.output-rows {
  border-top: 1px solid var(--line);
}

.output-row {
  display: grid;
  grid-template-columns: 70px minmax(230px, 0.8fr) minmax(320px, 1.1fr) minmax(240px, 0.9fr);
  gap: 26px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.output-id {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
}

.output-title {
  display: flex;
  align-items: center;
  gap: 15px;
}

.output-title h3,
.output-title p {
  margin: 0;
}

.output-title p,
.output-note {
  color: var(--muted);
  font-size: 11px;
}

.output-symbol {
  position: relative;
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
}

.lock-symbol::after {
  content: "";
  position: absolute;
  inset: 9px 10px 8px;
  border: 2px solid var(--power);
  border-top: 0;
}

.lock-symbol::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 14px;
  width: 8px;
  height: 10px;
  border: 2px solid var(--power);
  border-bottom: 0;
  border-radius: 7px 7px 0 0;
}

.lamp-symbol::after {
  content: "";
  position: absolute;
  inset: 9px;
  border: 2px solid var(--can-h);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(105, 185, 130, 0.44);
}

.buzzer-symbol::before,
.buzzer-symbol::after {
  content: "";
  position: absolute;
  border: 1px solid var(--logic);
  border-left: 0;
  border-radius: 0 50% 50% 0;
}

.buzzer-symbol::before { inset: 11px 8px 11px 18px; }
.buzzer-symbol::after { inset: 7px 4px 7px 14px; }

.output-chain {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 9px;
  white-space: nowrap;
}

.output-chain span {
  padding: 6px 8px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.output-chain i {
  color: var(--power);
  font-style: normal;
}

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

.caution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 40px;
  border: 1px solid var(--line);
  background: var(--line);
}

.caution-grid > div {
  padding: 26px;
  background: var(--surface);
}

.caution-grid p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 12px;
}

.can-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--surface);
}

.can-map {
  display: block;
  min-width: 1100px;
  width: 100%;
  height: auto;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 24px 24px;
}

.can-room-zones rect {
  fill: rgba(255, 255, 255, 0.012);
  stroke: #394039;
  stroke-dasharray: 6 7;
  stroke-width: 1;
}

.can-room-zones text {
  fill: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.can-map-trunk path,
.can-segment-node path,
.can-map-terminator path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.4;
  vector-effect: non-scaling-stroke;
}

.can-map-h,
.stub-h { stroke: var(--can-h); }

.can-map-l,
.stub-l { stroke: var(--can-l); }

.can-h-label { fill: var(--can-h); }
.can-l-label { fill: var(--can-l); }

.can-segment-node rect {
  fill: #151916;
  stroke: #3b433c;
  stroke-width: 1;
}

.can-map-terminator rect {
  fill: var(--bg);
  stroke: var(--accent);
  stroke-width: 1;
}

.can-map-terminator path {
  stroke: var(--accent);
}

.can-map-terminator text {
  fill: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
}

.can-map-terminator .can-map-small {
  fill: var(--faint);
  font-size: 8px;
  letter-spacing: 0.1em;
}

.can-map-legend text {
  fill: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.can-explainers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 34px;
  border-top: 1px solid var(--line);
}

.can-explainers > div {
  padding: 24px 22px;
  border-right: 1px solid var(--line);
}

.can-explainers > div:last-child {
  border-right: 0;
}

.can-explainers span,
.can-explainers strong {
  display: block;
}

.can-explainers span {
  margin-bottom: 18px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
}

.can-explainers strong {
  margin-bottom: 8px;
  font-size: 13px;
}

.can-explainers p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.test-sequence {
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.test-sequence li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 28px;
  padding: 21px 0;
  border-bottom: 1px solid var(--line-soft);
}

.test-sequence li > span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
}

.test-sequence strong,
.test-sequence p {
  display: block;
  margin: 0;
}

.test-sequence strong {
  margin-bottom: 4px;
  font-size: 14px;
}

.test-sequence p {
  color: var(--muted);
  font-size: 12px;
}

.test-result {
  margin-top: 28px;
  padding: 0 20px;
  border: 1px solid rgba(120, 189, 140, 0.5);
  background: #172119;
}

.test-result .task {
  border: 0;
}

.inventory-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.inventory-summary {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.inventory-summary strong {
  color: var(--accent);
  font-family: var(--sans);
  font-size: 36px;
  font-weight: 400;
}

.inventory-summary span {
  color: var(--muted);
  font-size: 11px;
}

.parts-table-wrap {
  overflow-x: auto;
  border-top: 1px solid var(--line);
}

.parts-table {
  min-width: 900px;
}

.parts-table th:first-child { width: 32%; }
.parts-table th:nth-child(2) { width: 10%; }
.parts-table th:nth-child(3) { width: 31%; }

.parts-table td {
  color: var(--muted);
  font-size: 11px;
}

.parts-table td:first-child {
  color: var(--text);
  font-size: 12px;
}

.parts-table td:first-child b {
  display: inline-block;
  width: 28px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
}

.parts-table tr {
  transition: background 120ms ease;
}

.parts-table tbody tr:hover {
  background: var(--surface);
}

.parts-table tr.hidden {
  display: none;
}

.inventory-footnote {
  max-width: 900px;
  margin: 26px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--signal);
  color: var(--muted);
  font-size: 12px;
}

/* Productionization page */

.scope-banner {
  margin-bottom: 44px;
}

.maturity-track {
  display: grid;
  grid-template-columns: 1fr 42px 1fr 42px 1fr 42px 1fr;
  align-items: center;
  margin: 42px 0 52px;
}

.maturity-track > div {
  min-height: 138px;
  padding: 22px 20px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.maturity-track > div.complete {
  box-shadow: inset 0 2px var(--success);
}

.maturity-track span,
.maturity-track strong {
  display: block;
}

.maturity-track span {
  margin-bottom: 22px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
}

.maturity-track strong {
  font-size: 13px;
}

.maturity-track p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 10px;
}

.maturity-track i {
  position: relative;
  height: 1px;
  background: var(--line);
}

.maturity-track i::after {
  content: "";
  position: absolute;
  top: -3px;
  right: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid var(--line);
}

.bench-vs-product {
  border-top: 1px solid var(--line);
}

.bench-vs-product > div {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 42px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line-soft);
}

.bench-vs-product .comparison-heading {
  padding-top: 12px;
  padding-bottom: 12px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.bench-vs-product p {
  margin: 0;
  font-size: 12px;
}

.bench-vs-product p:first-child {
  color: var(--muted);
}

.production-stack {
  border: 1px solid var(--line);
  background: var(--surface);
}

.production-layer {
  display: grid;
  grid-template-columns: 130px minmax(260px, 0.8fr) 1fr;
  gap: 28px;
  align-items: center;
  min-height: 106px;
  padding: 24px 28px;
}

.production-layer span,
.decision-lines span,
.local-code-boundary span {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.production-layer strong {
  font-size: 15px;
}

.production-layer p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.central-layer { box-shadow: inset 3px 0 var(--accent); }
.room-layer { box-shadow: inset 3px 0 var(--logic); }
.field-layer { box-shadow: inset 3px 0 var(--can-h); }

.layer-link {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 28px;
  padding: 12px 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  color: var(--faint);
  font-size: 10px;
}

.layer-link b {
  color: var(--text);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
}

.decision-lines {
  margin-top: 34px;
  border-top: 1px solid var(--line);
}

.decision-lines > div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 28px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.decision-lines p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.decision-lines > div:last-child span {
  color: var(--danger);
}

.readiness-checks {
  display: grid;
  margin-top: 44px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

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

.readiness-checks .task {
  padding: 19px 22px;
  border-right: 1px solid var(--line);
  border-bottom: 0;
}

.readiness-checks .task:last-child {
  border-right: 0;
}

.upgrade-table-wrap,
.failure-matrix-wrap {
  overflow-x: auto;
  border-top: 1px solid var(--line);
}

.upgrade-table,
.failure-matrix {
  width: 100%;
  min-width: 850px;
  border-collapse: collapse;
  text-align: left;
}

.upgrade-table th,
.upgrade-table td,
.failure-matrix th,
.failure-matrix td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

.upgrade-table th,
.failure-matrix th {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.upgrade-table td,
.failure-matrix td {
  color: var(--muted);
  font-size: 11px;
}

.upgrade-table td:first-child,
.upgrade-table td:nth-child(2),
.failure-matrix td:first-child {
  color: var(--text);
}

.upgrade-table th:first-child { width: 24%; }
.upgrade-table th:nth-child(2) { width: 42%; }
.failure-matrix th:first-child { width: 17%; }

.node-standard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 40px;
  border: 1px solid var(--line);
  background: var(--line);
}

.node-standard > div {
  padding: 28px;
  background: var(--surface);
}

.line-list {
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.line-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 11px;
}

.line-list li::before {
  content: "—";
  margin-right: 9px;
  color: var(--accent);
}

.cable-schedule {
  border-top: 1px solid var(--line);
}

.cable-schedule > div {
  display: grid;
  grid-template-columns: 36px 180px 1fr;
  gap: 24px;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.cable-schedule strong {
  font-size: 14px;
}

.cable-schedule p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.cable-mark {
  display: block;
  width: 32px;
  height: 3px;
  background: var(--faint);
}

.power-mark { background: var(--power); }
.can-mark { background: linear-gradient(var(--can-h) 0 0) 0 0 / 100% 1px, linear-gradient(var(--can-l) 0 0) 0 100% / 100% 1px; background-repeat: no-repeat; }
.ethernet-mark { background: var(--logic); }
.show-mark { background: var(--signal); }
.safety-mark { background: var(--danger); }

.installation-record {
  margin-top: 42px;
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.record-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.record-grid span {
  padding: 13px 12px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 10px;
}

.record-grid span:nth-child(3n) {
  border-right: 0;
}

.contract-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.contract-pair > div {
  min-width: 0;
  padding: 26px;
  background: var(--surface);
}

.contract-pair small,
.contract-pair strong {
  display: block;
}

.contract-pair small {
  margin-bottom: 7px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.contract-pair pre {
  overflow-x: auto;
  margin: 20px 0 0;
  padding: 18px;
  background: var(--bg);
  color: #b7c9bb;
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.7;
}

.protocol-requirements {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 42px;
  border-top: 1px solid var(--line);
}

.protocol-requirements > div {
  min-height: 150px;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.protocol-requirements > div:nth-child(3n) {
  border-right: 0;
}

.protocol-requirements span,
.protocol-requirements strong {
  display: block;
}

.protocol-requirements span {
  margin-bottom: 18px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
}

.protocol-requirements strong {
  font-size: 13px;
}

.protocol-requirements p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 10px;
}

.local-code-boundary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 36px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.local-code-boundary > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 20px;
  padding: 20px;
  border-right: 1px solid var(--line);
}

.local-code-boundary > div:last-child {
  border-right: 0;
}

.local-code-boundary p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.soak-sequence {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 42px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.soak-sequence > div {
  min-height: 152px;
  padding: 22px;
  border-right: 1px solid var(--line);
}

.soak-sequence > div:last-child {
  border-right: 0;
}

.soak-sequence span,
.soak-sequence strong {
  display: block;
}

.soak-sequence span {
  margin-bottom: 22px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
}

.soak-sequence strong {
  font-size: 13px;
}

.soak-sequence p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 10px;
}

.commission-gates {
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.commission-gates li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 30px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-soft);
}

.commission-gates li > span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 9px;
}

.commission-gates strong {
  font-size: 14px;
}

.commission-gates p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.final-gates {
  border-color: rgba(120, 189, 140, 0.4);
  background: #151d17;
}

.production-definition {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 28px;
  align-items: start;
  margin-top: 38px;
  padding: 28px;
  border-left: 3px solid var(--success);
  background: var(--surface);
}

.production-definition span {
  color: var(--success);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.production-definition strong {
  font-size: 16px;
  line-height: 1.45;
}

footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  padding: 48px 0 60px;
}

footer strong {
  font-size: 13px;
}

footer p {
  margin: 4px 0 0;
  color: var(--faint);
  font-size: 11px;
}

footer a {
  color: var(--accent);
  font-size: 12px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 80;
  padding: 11px 15px;
  border: 1px solid var(--accent);
  background: var(--surface-2);
  color: var(--text);
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1400px) {
  :root { --sidebar: 190px; }
  main { padding: 0 42px; }
  .topbar { padding-right: 22px; }
  .pin-layout { grid-template-columns: 1fr; }
  .pin-copy { margin-top: 40px; }
  .output-row { grid-template-columns: 60px minmax(220px, 0.7fr) 1fr; }
  .output-note { grid-column: 2 / -1; }
}

@media (max-width: 900px) {
  :root { --topbar: 64px; }
  .topbar { grid-template-columns: 1fr auto; padding: 0 18px; }
  .topbar-progress { display: none; }
  .brand small { display: none; }
  .app-shell { display: block; }
  .sidebar { display: none; }
  main { width: 100%; padding: 0 24px; }
  .facts { grid-template-columns: 1fr 1fr; }
  .facts div:nth-child(2) { border-right: 0; }
  .facts div:nth-child(3) { border-top: 1px solid var(--line); padding-left: 0; }
  .facts div:nth-child(4) { border-top: 1px solid var(--line); }
  .two-column,
  .build-notes,
  .caution-grid,
  .bench-zones,
  .bench-checks,
  .responsibility-rule,
  .node-standard,
  .contract-pair,
  .local-code-boundary,
  .two-gate-columns,
  .three-gate-columns { grid-template-columns: 1fr; }
  .bench-zone,
  .bench-zone:last-child,
  .bench-checks .task,
  .bench-checks .task:last-child { border-right: 0; }
  .bench-zone + .bench-zone,
  .bench-checks .task + .task { border-top: 1px solid var(--line); }
  .node-checks { grid-template-columns: 1fr; gap: 0; }
  .responsibility-rule > div,
  .responsibility-rule > div:last-child,
  .readiness-checks .task,
  .readiness-checks .task:last-child,
  .local-code-boundary > div,
  .local-code-boundary > div:last-child { border-right: 0; }
  .responsibility-rule > div + div,
  .readiness-checks .task + .task,
  .local-code-boundary > div + div { border-top: 1px solid var(--line); }
  .architecture-contract { grid-template-columns: 1fr; gap: 18px; }
  .architecture-contract a { white-space: normal; }
  .maturity-track { grid-template-columns: 1fr 24px 1fr 24px 1fr 24px 1fr; }
  .production-layer { grid-template-columns: 100px minmax(220px, 0.8fr) 1fr; gap: 18px; }
  .layer-link { grid-template-columns: 100px 1fr; gap: 18px; }
  .protocol-requirements { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .protocol-requirements > div:nth-child(3n) { border-right: 1px solid var(--line); }
  .protocol-requirements > div:nth-child(2n) { border-right: 0; }
  .record-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .record-grid span:nth-child(3n) { border-right: 1px solid var(--line); }
  .record-grid span:nth-child(2n) { border-right: 0; }
  .can-explainers { grid-template-columns: 1fr 1fr; }
  .can-explainers > div:nth-child(2) { border-right: 0; }
  .can-explainers > div:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .inventory-toolbar { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 640px) {
  main { padding: 0 18px; }
  .print-button { display: none; }
  .intro { padding: 54px 0 64px; }
  h1 { font-size: 48px; }
  .facts { grid-template-columns: 1fr; }
  .facts div,
  .facts div:first-child,
  .facts div:nth-child(3),
  .facts div:nth-child(4) { padding: 14px 0; border-right: 0; border-top: 1px solid var(--line); }
  .facts div:first-child { border-top: 0; }
  .diagram-toolbar { align-items: flex-start; flex-direction: column; }
  .control-stack { padding: 20px 16px; }
  .control-tier { padding: 18px 16px; }
  .control-connector span { left: 12px; }
  .node-tier { grid-template-columns: 1fr; }
  .node-tier > div,
  .node-tier > div:last-child { min-height: auto; border-right: 0; }
  .node-tier > div + div { border-top: 1px solid var(--line); }
  .signal-journey { grid-template-columns: 1fr; }
  .signal-journey li,
  .signal-journey li:last-child { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .maturity-track { grid-template-columns: 1fr; gap: 0; }
  .maturity-track > div { min-height: auto; }
  .maturity-track i { display: none; }
  .bench-vs-product > div { grid-template-columns: 1fr; gap: 7px; padding: 17px 0; }
  .production-layer { grid-template-columns: 1fr; gap: 7px; padding: 22px 18px; }
  .layer-link { grid-template-columns: 1fr; gap: 4px; padding: 12px 18px; }
  .decision-lines > div { grid-template-columns: 80px 1fr; gap: 16px; }
  .cable-schedule > div { grid-template-columns: 30px 1fr; gap: 14px; align-items: start; }
  .cable-schedule p { grid-column: 2; }
  .installation-record { padding: 20px 16px; }
  .record-grid,
  .protocol-requirements,
  .soak-sequence { grid-template-columns: 1fr; }
  .record-grid span,
  .record-grid span:nth-child(2n),
  .record-grid span:nth-child(3n),
  .protocol-requirements > div,
  .protocol-requirements > div:nth-child(2n),
  .protocol-requirements > div:nth-child(3n),
  .soak-sequence > div,
  .soak-sequence > div:last-child { border-right: 0; }
  .contract-pair > div { padding: 20px 16px; }
  .local-code-boundary > div { grid-template-columns: 1fr; gap: 7px; }
  .commission-gates li { grid-template-columns: 75px 1fr; gap: 18px; }
  .production-definition { grid-template-columns: 1fr; gap: 12px; padding: 22px 20px; }
  .bench-plan-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
  .guide-section { padding: 74px 0; }
  .section-number { top: 78px; }
  .section-heading { margin: 0 0 34px 44px; }
  .section-heading > p:last-child { font-size: 15px; }
  .power-diagram { padding: 20px; }
  .pin-layout { display: block; }
  .board-visual { display: none; }
  .pin-copy table { display: block; overflow-x: auto; }
  .output-row { grid-template-columns: 48px 1fr; gap: 16px; }
  .output-chain,
  .output-note { grid-column: 2; }
  .can-map { min-width: 820px; }
  .can-explainers { grid-template-columns: 1fr; }
  .can-explainers > div { border-right: 0; border-top: 1px solid var(--line); }
  .can-explainers > div:first-child { border-top: 0; }
  .test-sequence li { grid-template-columns: 56px 1fr; gap: 16px; }
  footer { align-items: flex-start; flex-direction: column; }
  .footer-links { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  :root { color-scheme: light; --bg: #fff; --surface: #f5f5f2; --surface-2: #eee; --line: #bbb; --line-soft: #ddd; --text: #111; --muted: #555; --faint: #777; }
  .topbar, .sidebar, .diagram-toolbar, .inventory-toolbar, .toast, .print-button { display: none !important; }
  .app-shell { display: block; padding: 0; }
  main { width: 100%; padding: 0; }
  .intro, .guide-section { padding: 32px 0; break-inside: avoid; }
  .reveal { opacity: 1; transform: none; }
  .diagram-shell, .can-scroll, .technical-note, .caution-grid > div { background: #fff; }
  .system-map .schematic-node rect,
  .can-segment-node rect,
  .can-map-terminator rect { fill: #fff; }
  .system-map .schematic-node rect.primary-node { fill: #f5f5f2; }
}