/* FLIGHT MANUAL — the committed world for the public developer docs.
   1960s-70s aerospace technical manual: paper, international orange, blueprint
   blue, measured rules, numbered sections. Single-theme (paper) by design.
   Layout: contents rail pinned to the LEFT edge, per-section SPEC code rail
   pinned to the RIGHT edge (wide), prose centered between them.
   Faces: Helvetica (era-authentic system stack) + self-hosted Space Mono. */

@font-face {
  font-family: "Space Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/space-mono-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Space Mono";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/space-mono-latin-700-normal.woff2") format("woff2");
}

:root, [data-theme="paper"] {
  --paper: #F5F3ED;
  --paper-2: #ECE9E0;
  --card: #FDFCF9;
  --ink: #17181A;
  --ink-2: #45464A;
  --muted: #6E6F73;
  --orange: #FF4F00;
  --orange-deep: #E64700;
  --orange-wash: #FFE3D6;
  --blue: #16467B;
  --blue-wash: #DFE7F0;
  --green: #3E6B45;
  --green-wash: #E2EBE3;
  --red: #A3271B;
  --red-wash: #F2DFDC;
  --rule: #C9C5BA;
  --rule-2: #A9A59A;
  --slate: #21242A;
  --slate-fg: #E8E6DF;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "Space Mono", ui-monospace, monospace;
  --prose: 700px;
  --railw: clamp(400px, 32vw, 560px);
  --sidebar-w: 250px;
  --topbar-h: 57px;
  --fast: 140ms;
  --base: 220ms;
  --ease: cubic-bezier(0.2, 0, 0, 1);
  color-scheme: light;
}
/* NIGHT — the same manual under cockpit night lighting: warm dark slate,
   the international orange kept as the instrument accent, code wells one
   step darker than the page. */
[data-theme="night"] {
  --paper: #1B1D21;
  --paper-2: #24262B;
  --card: #202329;
  --ink: #E9E7DF;
  --ink-2: #BDBBB1;
  --muted: #918F85;
  --orange: #FF6321;
  --orange-deep: #FF7A3D;
  --orange-wash: #3D2317;
  --blue: #7FA9D9;
  --blue-wash: #1E2A38;
  --green: #8CB894;
  --green-wash: #202B22;
  --red: #E08E83;
  --red-wash: #33211E;
  --rule: #3A3D43;
  --rule-2: #53565D;
  --slate: #121418;
  --slate-fg: #E8E6DF;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--orange); text-decoration: underline; text-underline-offset: 2px; }
:focus-visible { outline: 2px solid var(--orange-deep); outline-offset: 2px; }
.mono { font-family: var(--mono); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap;
}
.skip-link {
  position: fixed; top: -48px; left: 16px; z-index: 100;
  padding: 8px 14px; background: var(--ink); color: var(--paper);
  font-size: 13px;
  transition: top var(--fast) var(--ease);
}
.skip-link:focus { top: 0; color: var(--paper); text-decoration: none; }

/* Reading progress — thin orange rule under the dataplate */
.progress { position: fixed; inset: 0 0 auto 0; z-index: 60; height: 3px; pointer-events: none; }
.progress > i {
  display: block; height: 100%; width: 100%;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--fast) var(--ease);
}

/* ============ Data plate (header) ============ */
.dataplate {
  position: sticky; top: 0; z-index: 50;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: stretch;
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
}
.dp-cell {
  padding: 10px 18px;
  border-right: 1px solid var(--rule);
  display: flex; align-items: center;
}
.dp-cell:last-child { border-right: 0; }
.dp-brand { gap: 12px; }
.dp-mark {
  width: 32px; height: 32px; border: 2.5px solid var(--ink); border-radius: 50%;
  position: relative; flex-shrink: 0;
}
.dp-mark::before {
  content: ""; position: absolute; inset: -2.5px; border-radius: 50%;
  border: 2.5px solid transparent;
  border-top-color: var(--orange); border-right-color: var(--orange);
  transform: rotate(45deg);
}
.dp-brand b { font-size: 16px; letter-spacing: 0.02em; display: block; line-height: 1.15; }
.dp-brand small {
  display: block; font-size: 10px; letter-spacing: 0.24em;
  color: var(--ink-2); text-transform: uppercase;
}
.dp-meta {
  font-family: var(--mono); font-size: 10px; line-height: 1.7;
  color: var(--ink-2); text-transform: uppercase; letter-spacing: 0.04em;
}
.dp-meta b { color: var(--ink); }
.dp-meta-in { display: block; }
.dp-actions { gap: 12px; }
.rev {
  font-family: var(--mono); font-weight: 700; font-size: 11px;
  color: var(--orange); border: 2px solid var(--orange);
  padding: 4px 10px; letter-spacing: 0.1em;
  transform: rotate(-3deg);
  white-space: nowrap;
}
.lang-switch, .mode-toggle {
  display: inline-flex; align-items: center;
  height: 32px; line-height: 1;
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  border: 1.5px solid var(--ink); color: var(--ink);
  background: none;
  padding: 0 12px;
  white-space: nowrap;
  cursor: pointer;
}
.lang-switch:hover, .mode-toggle:hover { background: var(--orange); border-color: var(--orange); color: #FFF; text-decoration: none; }
.toc-toggle {
  display: none;
  align-items: center;
  height: 32px; line-height: 1;
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  background: none; border: 1.5px solid var(--ink); color: var(--ink);
  padding: 0 12px; cursor: pointer;
}

/* ============ Layout: rails pinned to the edges, prose centered ============ */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
}
/* Contents rail — pinned to the left edge */
.toc-rail {
  position: sticky; top: var(--topbar-h);
  align-self: start;
  height: calc(100vh - var(--topbar-h));
  overflow: auto;
  border-right: 1px solid var(--rule);
  padding: 20px 0 40px;
  background: var(--paper);
  overscroll-behavior: contain;
}
.toc-rail::-webkit-scrollbar { width: 6px; }
.toc-rail::-webkit-scrollbar-thumb { background: var(--rule-2); }
.toc-label {
  margin: 0 18px 10px;
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.24em; text-transform: uppercase; color: var(--ink-2);
}
.toc-search {
  display: block; width: calc(100% - 36px);
  margin: 0 18px 6px;
  height: 32px; padding: 0 10px;
  border: 1px solid var(--rule-2); border-radius: 0;
  background: var(--card); color: var(--ink);
  font-family: var(--mono); font-size: 12px;
}
.toc-search::placeholder { color: var(--muted); }
.toc-search:focus { border-color: var(--orange-deep); outline: 2px solid var(--orange-deep); outline-offset: 1px; }
.toc-count {
  margin: 0 18px 8px;
  font-family: var(--mono); font-size: 10px; color: var(--muted);
}
.toc-list { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.toc-list > li { margin: 0; counter-increment: toc; }
.toc-list > li > a {
  display: flex; gap: 10px; align-items: baseline;
  padding: 6px 18px;
  color: var(--ink); font-size: 13px;
}
.toc-list > li > a::before {
  content: counter(toc) ".0";
  font-family: var(--mono); font-size: 10.5px;
  color: var(--muted); min-width: 30px; flex-shrink: 0;
}
.toc-list > li > a:hover { background: var(--paper-2); text-decoration: none; color: var(--ink); }
.toc-list > li > a.is-active {
  border-left: 3px solid var(--orange);
  padding-left: 15px;
  font-weight: 700;
}
.toc-list > li > a.is-active::before { color: var(--orange); }
.toc-list li.is-hidden { display: none; }
/* h3 submenus (built by docs.js) — visible under the active section */
.toc-sub { list-style: none; margin: 0; padding: 0 0 4px; display: none; }
.toc-list > li > a.is-active + .toc-sub { display: block; }
.toc-sub li { margin: 0; }
.toc-sub a {
  display: block; padding: 3px 18px 3px 46px;
  font-size: 12px; color: var(--ink-2);
}
.toc-sub a:hover { color: var(--orange); text-decoration: none; }

/* ============ Main column ============ */
main.doc {
  padding: 30px clamp(20px, 3vw, 48px) 90px;
  min-width: 0;
  counter-reset: sec;
}
/* Prose is centered at a fixed measure; the SPEC rail hugs the right edge. */
main.doc > section > *,
.doc-hero > * {
  width: min(100%, var(--prose));
  margin-inline: auto;
}
.doc-hero > .wire,
.doc-hero > .iw { width: min(100%, 1150px); }

/* Hero */
.doc-hero { margin-bottom: 34px; border-bottom: 2px solid var(--ink); padding-bottom: 26px; }
.sec-eyebrow {
  display: block;
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  letter-spacing: 0.16em; color: var(--orange); text-transform: uppercase;
}
.doc-hero h1 {
  margin: 4px auto 8px;
  font-size: 34px; font-weight: 700; letter-spacing: -0.015em; line-height: 1.08;
  text-wrap: balance;
}
.doc-hero .lead { margin: 0 auto 16px; color: var(--ink-2); }
.hero-chips {
  display: flex; flex-wrap: wrap; gap: 0;
  border: 1px solid var(--ink);
  width: min(fit-content, 100%);
}
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px;
  border-right: 1px solid var(--rule);
  font-family: var(--mono); font-size: 11px; color: var(--ink-2);
}
.chip:last-child { border-right: 0; }
.chip strong { color: var(--ink); font-weight: 700; }
.chip .dot { width: 7px; height: 7px; background: var(--orange); border-radius: 50%; }

/* Wire — FIG. 0-1, the pipeline demo in manual dress */
.wire { margin-top: 24px; border: 1px solid var(--ink); background: var(--paper); }
.wire-figbar {
  display: flex; justify-content: space-between; gap: 10px;
  border-bottom: 1px solid var(--ink);
  padding: 5px 12px;
  font-family: var(--mono); font-size: 10.5px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
}
.wire-figbar .ref { color: var(--blue); white-space: nowrap; }
.wire-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px minmax(0, 1fr);
  gap: 14px; padding: 16px 14px;
  align-items: stretch;
}
.wire-card {
  border: 1.5px solid var(--ink);
  display: flex; flex-direction: column;
  min-height: 132px;
  background: var(--card);
}
.wire-cap {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  border-bottom: 1px solid var(--rule-2);
  padding: 4px 10px;
}
.wire-cap-label {
  font-family: var(--mono); font-size: 9.5px; font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-2);
}
.wire-cap-meta {
  font-family: var(--mono); font-size: 9.5px; color: var(--muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.wire-body {
  flex: 1; display: flex; align-items: center;
  padding: 12px; font-family: var(--mono); font-size: 13px;
}
.wire-caret { display: none; width: 8px; height: 14px; margin-left: 3px; background: var(--orange); }
.wire.is-typing .wire-caret { display: inline-block; animation: fm-blink 1.1s steps(1) infinite; }
@keyframes fm-blink { 50% { opacity: 0.2; } }
.wire-foot {
  display: flex; gap: 12px; padding: 4px 10px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 9.5px; color: var(--muted);
}
.wire-out { background: var(--slate); border-color: var(--ink); color: var(--slate-fg); }
.wire-cap-screen { border-bottom-color: #454A54; }
.wire-cap-screen .wire-cap-label { color: #9BA0A8; }
.wire-status {
  font-family: var(--mono); font-size: 9.5px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 1px 8px;
}
.wire-status[data-state="queued"] { background: #454A54; color: #C6C3BA; }
.wire-status[data-state="in_progress"] { background: var(--orange); color: #FFF; }
.wire-status[data-state="done"] { background: var(--green); color: #FFF; }
.wire-lcd { flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 6px; padding: 10px 12px; }
.wire-line { display: flex; align-items: baseline; gap: 10px; font-family: var(--mono); font-size: 12.5px; color: var(--slate-fg); }
.wire-line .wire-lang { font-size: 9.5px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #9BA0A8; flex-shrink: 0; }
.wire-line.is-dim { opacity: 0; }
.wire-foot-screen { border-top-color: #454A54; color: #9BA0A8; }
.wire-conduit { position: relative; padding: 18px 12px 6px; }
.wire-rail, .wire-rail-live { position: absolute; top: 24px; left: 16px; right: 16px; height: 2px; }
.wire-rail { background: var(--rule-2); }
.wire-rail-live {
  width: 100%;
  background: repeating-linear-gradient(90deg, var(--orange) 0 6px, transparent 6px 12px);
  transition: width 360ms var(--ease);
}
.wire-rail-live.is-flowing { animation: fm-dash 360ms linear infinite; }
@keyframes fm-dash { from { background-position: 0 0; } to { background-position: 12px 0; } }
.wire-stops { position: relative; display: flex; justify-content: space-between; margin: 0; padding: 0 2px; list-style: none; }
.wire-stops li { margin: 0; }
.wire-stop { display: flex; flex-direction: column; align-items: center; gap: 9px; width: 20px; }
.wire-led {
  width: 8px; height: 8px; margin-top: 2px; border-radius: 50%;
  background: var(--rule-2);
  transition: background var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}
.wire-stop.is-passed .wire-led { background: var(--ink); }
.wire-stop.is-live .wire-led {
  background: var(--orange);
  box-shadow: 0 0 0 3px var(--orange-wash);
  animation: fm-blink 1.1s steps(1) infinite;
}
.wire-stop span {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em;
  color: var(--muted); writing-mode: vertical-rl; line-height: 1;
}

/* ============ Sections & prose ============ */
main.doc > section {
  margin: 0 0 46px;
  padding-top: 10px;
  scroll-margin-top: calc(var(--topbar-h) + 16px);
  counter-increment: sec;
  counter-reset: sub spec;
}
main.doc > section > h2 {
  margin-top: 0; margin-bottom: 12px;
  font-size: 22px; font-weight: 700; letter-spacing: -0.01em; line-height: 1.15;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 8px;
}
main.doc > section > h2::before {
  content: counter(sec) ".0";
  font-family: var(--mono); font-size: 12px; font-weight: 700;
  color: var(--orange); letter-spacing: 0.1em;
  display: block; margin-bottom: 2px;
}
main.doc > section h3 {
  margin-top: 24px; margin-bottom: 8px;
  font-size: 15.5px; font-weight: 700;
  counter-increment: sub;
  scroll-margin-top: calc(var(--topbar-h) + 16px);
}
main.doc > section h3::before {
  content: counter(sec) "." counter(sub) "  ";
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-2);
}
main.doc > section h4 {
  margin-top: 16px; margin-bottom: 6px;
  font-size: 13px; font-weight: 700; color: var(--ink-2);
  text-transform: uppercase; letter-spacing: 0.06em;
}
p, ul, ol { margin-block: 0.65rem; color: var(--ink-2); }
p, li, td { overflow-wrap: break-word; }
ul, ol { padding-left: 1.3rem; }
li { margin-block: 0.3rem; }
li::marker { color: var(--rule-2); }
strong { color: var(--ink); font-weight: 700; }
hr { border: 0; border-top: 1px solid var(--rule); margin-block: 28px; }
blockquote {
  margin-block: 16px;
  padding: 10px 14px;
  border: 2px solid var(--orange);
  color: var(--ink);
}
blockquote::before {
  content: "NOTE";
  display: block;
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.2em; color: var(--orange);
  margin-bottom: 4px;
}
blockquote p { margin: 0; color: inherit; }
:not(pre) > code {
  font-family: var(--mono); font-size: 0.86em;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 0.1em 0.4em;
  overflow-wrap: anywhere;
}
mark.live-sub { background: var(--orange-wash); color: inherit; padding: 0 1px; }
pre mark.live-sub { background: rgba(255, 79, 0, 0.28); color: var(--slate-fg); }

/* Per-section SPEC rail: prose centered in the left track, code pinned right */
main.doc > section.has-rail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--railw);
  column-gap: clamp(24px, 3vw, 44px);
}
main.doc > section.has-rail > * { grid-column: 1; min-width: 0; }
main.doc > section.has-rail > .sec-rail {
  grid-column: 2;
  grid-row: 1 / span 400;
  width: 100%;
  margin-inline: 0;
  min-width: 0;
  display: flex; flex-direction: column; gap: 16px;
  align-self: start;
  position: sticky; top: calc(var(--topbar-h) + 14px);
  max-height: calc(100vh - var(--topbar-h) - 30px);
  overflow: auto;
  padding: 2px;
  overscroll-behavior: contain;
}
.sec-rail::-webkit-scrollbar { width: 6px; }
.sec-rail::-webkit-scrollbar-thumb { background: var(--rule-2); }

/* Code faceplates — SPEC panels */
.pre-wrap {
  margin-block: 14px;
  border: 1px solid var(--ink);
  background: var(--slate);
  counter-increment: spec;
}
.sec-rail .pre-wrap { margin-block: 0; }
.pre-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--paper);
  border-bottom: 1px solid var(--ink);
  padding: 4px 10px;
}
.pre-label {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2);
}
.pre-label::before {
  content: "SPEC " counter(sec) "-" counter(spec) "  ·  ";
  color: var(--blue);
}
.copy-btn {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  background: none; border: 1.5px solid var(--ink); color: var(--ink);
  padding: 2px 8px; cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.copy-btn:hover { background: var(--orange); border-color: var(--orange); color: #FFF; }
.copy-btn.is-copied { background: var(--green); border-color: var(--green); color: #FFF; }
pre {
  margin: 0; padding: 12px 14px;
  overflow-x: auto;
  font-family: var(--mono); font-size: 12px; line-height: 1.6;
  color: var(--slate-fg);
  tab-size: 2;
}
pre code { font: inherit; color: inherit; background: none; border: 0; padding: 0; }

/* Tables */
.table-wrap { margin-block: 14px; overflow-x: auto; border: 1px solid var(--ink); background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 9px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--rule); }
tr:last-child td { border-bottom: 0; }
th {
  background: var(--paper-2);
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2);
  border-bottom: 1px solid var(--ink);
  white-space: nowrap;
}
td { color: var(--ink-2); }
td code { white-space: nowrap; }
tr.is-hidden { display: none; }
tr.is-linked { cursor: pointer; }
tr.is-linked:hover td { background: var(--blue-wash); }
.method-chip {
  display: inline-flex; padding: 1px 7px;
  font-family: var(--mono); font-size: 10.5px; font-weight: 700; letter-spacing: 0.08em;
}
.method-chip[data-m="GET"] { background: var(--blue-wash); color: var(--blue); }
.method-chip[data-m="POST"] { background: var(--ink); color: var(--paper); }

/* ============ Instrument layer (interactive widgets) ============ */
.iw { margin-block: 18px 22px; border: 1px solid var(--ink); background: var(--card); }
.iw-cap {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: var(--paper-2);
  border-bottom: 1px solid var(--ink);
  padding: 6px 14px;
}
.iw-cap-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-2);
}
.iw-cap-led { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); }
.iw-cap-meta { font-family: var(--mono); font-size: 10px; color: var(--muted); }
.iw-body { padding: 14px; }
.iw-foot {
  padding: 6px 14px; border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 10.5px; color: var(--muted);
}
.iw-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.iw-group { display: flex; flex-direction: column; gap: 6px; margin: 0 0 12px; }
.iw-group:last-child { margin-bottom: 0; }
.iw-group-label {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2);
}
.iw-note { margin: 10px 0 0; font-size: 13px; color: var(--ink-2); }
.iw-note strong { color: var(--ink); }
.iw-hint { font-size: 12px; color: var(--muted); margin: 6px 0 0; }

/* Keycaps */
.kc {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 30px; padding: 0 11px;
  border: 1.5px solid var(--ink);
  background: var(--card); color: var(--ink-2);
  font-family: var(--mono); font-size: 11.5px;
  cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.kc:hover { border-color: var(--orange-deep); color: var(--ink); }
.kc:active { transform: translateY(1px); }
.kc[aria-pressed="true"] { background: var(--orange-wash); border-color: var(--orange-deep); color: var(--ink); }
.kc[aria-pressed="true"]::before { content: ""; width: 7px; height: 7px; background: var(--orange); border-radius: 50%; }
.kc:disabled { color: var(--muted); border-color: var(--rule); cursor: not-allowed; }

.state-chip {
  display: inline-flex; align-items: center; gap: 7px;
  min-height: 30px; padding: 0 11px;
  border: 1.5px solid var(--ink);
  background: var(--card); color: var(--ink);
  font-family: var(--mono); font-size: 11.5px;
  cursor: pointer;
}
.state-chip .state-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--rule-2); }
.state-chip[data-kind="ok"] .state-dot { background: var(--green); }
.state-chip[data-kind="bad"] .state-dot { background: var(--red); }
.state-chip[data-kind="warn"] .state-dot { background: var(--blue); }
.state-chip[data-kind="live"] .state-dot { background: var(--orange); }
.state-chip:hover { border-color: var(--orange-deep); }
.state-chip[aria-pressed="true"] { outline: 2px solid var(--orange-deep); outline-offset: 2px; }

.seg { display: inline-flex; border: 1.5px solid var(--ink); background: var(--card); }
.seg-btn {
  min-height: 28px; padding: 0 12px; border: 0; background: transparent;
  color: var(--ink-2);
  font-family: var(--mono); font-size: 10.5px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  cursor: pointer;
  border-right: 1px solid var(--rule);
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}
.seg-btn:last-child { border-right: 0; }
.seg-btn:hover { color: var(--ink); }
.seg-btn[aria-selected="true"] { background: var(--ink); color: var(--paper); }

.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field-label {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2);
}
.field-input, .field-area {
  width: 100%;
  border: 1px solid var(--rule-2); border-radius: 0;
  background: var(--card); color: var(--ink);
  font-family: var(--mono); font-size: 12.5px;
  padding: 7px 10px;
}
.field-input { height: 34px; }
.field-area { resize: vertical; min-height: 74px; line-height: 1.5; }
.field-input::placeholder, .field-area::placeholder { color: var(--muted); }
.field-input:focus, .field-area:focus { border-color: var(--orange-deep); outline: 2px solid var(--orange-deep); outline-offset: 1px; }
.field-row { display: flex; gap: 10px; align-items: flex-end; }
.field-row .field { flex: 1; }
.field-row .field-btn { flex: 0 0 auto; }

.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 34px; padding: 0 16px;
  background: var(--orange); border: 1.5px solid var(--orange); color: #FFF;
  font-family: var(--sans); font-size: 13px; font-weight: 700;
  cursor: pointer;
}
.btn-primary:hover { background: var(--orange-deep); border-color: var(--orange-deep); color: #FFF; text-decoration: none; }

/* LCD wells inside instruments (slate) */
.lcd { margin: 12px 0 0; border: 1px solid var(--ink); background: var(--slate); }
.lcd-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--paper); border-bottom: 1px solid var(--ink);
  padding: 4px 10px;
}
.lcd-label {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2);
}
.lcd pre { max-height: 420px; overflow: auto; }
.lcd .j-p { color: #9BA0A8; }
.lcd .j-k { color: var(--slate-fg); font-weight: 700; }
.lcd .j-s { color: #BFD9F2; }
.lcd .j-n { color: #D9C79A; }
.lcd .hl-line { display: inline-block; width: 100%; background: rgba(255, 79, 0, 0.22); }
.lcd .hl-word { color: #FF8A50; font-weight: 700; }
.lcd-swap { transition: opacity var(--fast) var(--ease); }
.lcd-swap.is-out { opacity: 0; }

.lamps { display: flex; flex-wrap: wrap; gap: 10px 18px; margin: 12px 0 0; }
.lamp {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 11px; color: var(--muted);
}
.lamp i { width: 8px; height: 8px; border-radius: 50%; background: var(--rule-2); }
.lamp.is-on { color: var(--ink); }
.lamp.is-on[data-tone="ok"] i { background: var(--green); }
.lamp.is-on[data-tone="bad"] i { background: var(--red); }
.lamp.is-on[data-tone="led"] i { background: var(--orange); }

.verdict {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 30px; padding: 0 12px;
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  border: 1.5px solid currentColor;
}
.verdict[data-v="ok"] { color: var(--green); background: var(--green-wash); }
.verdict[data-v="bad"] { color: var(--red); background: var(--red-wash); }
.verdict[data-v="idle"] { color: var(--muted); background: var(--paper-2); border-color: var(--rule-2); }

/* Signature lab steps */
.sig-steps { display: flex; flex-direction: column; gap: 8px; margin: 14px 0 0; }
.sig-step {
  display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--rule);
  background: var(--card);
  opacity: 0.5;
  transition: opacity var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.sig-step.is-on { opacity: 1; border-color: var(--rule-2); }
.sig-step.is-live { opacity: 1; border-color: var(--orange-deep); }
.sig-step-led { width: 8px; height: 8px; border-radius: 50%; margin-top: 5px; justify-self: center; background: var(--rule-2); }
.sig-step.is-on .sig-step-led { background: var(--ink); }
.sig-step.is-live .sig-step-led { background: var(--orange); animation: fm-blink 1.1s steps(1) infinite; }
.sig-step-title { font-size: 13px; font-weight: 700; color: var(--ink); margin: 0 0 2px; }
.sig-step-out { font-family: var(--mono); font-size: 11.5px; color: var(--ink-2); word-break: break-all; margin: 0; }
.sig-step-out .sig-id { color: var(--blue); }
.sig-step-out .sig-ts { color: var(--green); }
.sig-step-out .sig-body { color: var(--muted); }
.sig-step-out .sig-dotsep { color: var(--orange-deep); font-weight: 700; }

.skew { margin: 14px 0 0; }
.skew-scale { position: relative; height: 26px; border: 1px solid var(--ink); background: var(--paper-2); overflow: hidden; }
.skew-window { position: absolute; top: 0; bottom: 0; left: 25%; width: 50%; background: var(--green-wash); border-inline: 1px solid var(--green); }
.skew-marker { position: absolute; top: 2px; bottom: 2px; width: 2px; left: 50%; background: var(--ink); transition: left var(--fast) var(--ease), background var(--fast) var(--ease); }
.skew-marker.is-out { background: var(--red); }
.skew-labels { display: flex; justify-content: space-between; margin-top: 4px; font-family: var(--mono); font-size: 10px; color: var(--muted); }

.rl-meter { display: flex; gap: 3px; margin: 12px 0 0; }
.rl-cell { flex: 1; height: 10px; background: var(--orange); transition: background var(--fast) var(--ease); }
.rl-cell.is-off { background: var(--paper-2); border: 1px solid var(--rule); }
.rl-readout { margin: 6px 0 0; font-family: var(--mono); font-size: 11px; color: var(--ink-2); }

.flow-lanes { display: flex; flex-direction: column; gap: 10px; }
.flow-lane { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.flow-lane-label {
  width: 84px; flex-shrink: 0;
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted);
}
.flow-arrow { font-family: var(--mono); color: var(--rule-2); font-size: 12px; user-select: none; }
.flow-detail { margin-top: 14px; border-top: 1px solid var(--rule); padding-top: 12px; }
.flow-detail-desc { margin: 0; font-size: 13.5px; color: var(--ink-2); }
.flow-detail-desc strong { color: var(--ink); }

.ctx-steps { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0; padding: 0; list-style: none; }
.ctx-steps li { margin: 0; }
.ctx-step {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 32px; padding: 0 14px;
  border: 2px solid var(--ink); border-radius: 999px;
  background: var(--card); color: var(--ink);
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
  cursor: pointer;
}
.ctx-step[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.ctx-note { margin: 12px 0 0; font-size: 13.5px; color: var(--ink-2); }
.ctx-note strong { color: var(--ink); }

.ep-filter { margin-block: 12px; }
.ep-filter .field-input { max-width: 340px; }

/* Footer */
.page-footer {
  margin-top: 52px; padding-top: 14px;
  border-top: 2px solid var(--ink);
  display: flex; flex-wrap: wrap; gap: 12px 24px;
  align-items: center; justify-content: space-between;
  color: var(--muted); font-size: 12.5px;
}
.page-footer .mono { font-size: 10.5px; letter-spacing: 0.06em; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 70;
  display: flex; align-items: center; gap: 8px;
  min-height: 40px; padding: 8px 14px;
  border: 1.5px solid var(--ink);
  background: var(--paper); color: var(--ink);
  font-size: 13px;
  box-shadow: 6px 6px 0 rgba(23, 24, 26, 0.15);
  transform: translateY(12px); opacity: 0; pointer-events: none;
  transition: opacity var(--base) var(--ease), transform var(--base) var(--ease);
}
.toast.is-on { opacity: 1; transform: translateY(0); pointer-events: auto; }
.toast .led { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); }

/* Mobile */
.toc-backdrop { display: none; position: fixed; inset: 0; z-index: 45; background: rgba(23, 24, 26, 0.5); }
.toc-backdrop.is-on { display: block; }
@media (max-width: 1100px) {
  main.doc > section.has-rail { display: block; }
  main.doc > section.has-rail > .sec-rail {
    position: static; max-height: none; overflow: visible;
    margin-top: 14px;
    width: min(100%, var(--prose)); margin-inline: auto;
  }
  .sec-rail .pre-wrap { margin-block: 14px; }
}
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  main.doc { min-width: 0; padding: 22px 16px 64px; }
  .toc-toggle { display: inline-flex; }
  .dataplate { grid-template-columns: auto minmax(0, 1fr) auto; }
  .dp-meta-cell, .dp-issued { display: none; }
  .toc-rail {
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 50;
    width: min(300px, 88vw); height: 100vh;
    transform: translateX(-105%);
    transition: transform var(--base) var(--ease);
    border-right: 2px solid var(--ink);
    box-shadow: 8px 0 32px rgba(23, 24, 26, 0.15);
  }
  .toc-rail.is-open { transform: translateX(0); }
  .doc-hero h1 { font-size: 27px; }
  .wire-grid { grid-template-columns: 1fr; }
  .field-row { flex-direction: column; align-items: stretch; }
  .field-row .field-btn { align-self: flex-start; }
  .flow-lane-label { width: 100%; }
}

/* Print */
@media print {
  .progress, .dataplate, .toc-rail, .toc-backdrop, .toast, .pre-bar,
  .toc-toggle, .skip-link, .iw, .wire { display: none !important; }
  .layout { display: block; }
  main.doc { max-width: none; padding: 0; }
  main.doc > section.has-rail { display: block; }
  main.doc > section.has-rail > .sec-rail { position: static; max-height: none; overflow: visible; }
  .pre-wrap { break-inside: avoid; border: 1px solid #000; background: #FFF; }
  pre { color: #000; }
  a { color: inherit; text-decoration: none; }
  section { break-inside: avoid; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .wire-stop.is-live .wire-led,
  .sig-step.is-live .sig-step-led,
  .wire.is-typing .wire-caret { animation: none !important; opacity: 1; }
  .wire-rail-live.is-flowing { animation: none !important; }
}