/* Synergetic Now — zero dependencies, system fonts, light + dark first-class.
   Domain colours are Okabe-Ito (CVD-safe). Tier is encoded by shape/stroke only,
   so the two channels never collide. */

/* Dark is the default, unconditionally — not tied to prefers-color-scheme.
   theme.js stamps data-theme on :root before first paint; the toggle flips it.
   Domain hues are the Okabe-Ito palette, lifted for contrast on dark. */
:root, :root[data-theme="dark"] {
  --geometry: #4FA8DC;
  --quantum:  #F0B429;
  --computer: #35C79A;
  --program:  #E093C4;

  /* M/G/S/MGS layer hues (graph.json is authoritative; these back the CSS accents) */
  --meta:    #b07cd8;
  --genesis: #3fd99a;
  --shadow:  #ef6d5f;
  --mgs:     #4aa8e0;

  --bg:       #0f1216;
  --bg-2:     #151a20;
  --panel:    #161b21;
  --ink:      #e8eaed;
  --ink-2:    #a4afba;
  --ink-3:    #6f7c88;
  --rule:     #2a323b;
  --rule-2:   #212830;
  --accent:   #4aa8e0;
  --shadow:   0 1px 2px rgba(0,0,0,.4), 0 8px 28px rgba(0,0,0,.45);

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans:  ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono:  ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas, monospace;

  --hdr: 54px;
}

:root[data-theme="light"] {
  --bg: #fbfaf7; --bg-2: #f2efe9; --panel: #ffffff;
  --ink: #14181d; --ink-2: #4a5560; --ink-3: #7d8894;
  --rule: #ddd8ce; --rule-2: #e9e5dc; --accent: #0072B2;
  --shadow: 0 1px 2px rgba(20,24,29,.05), 0 8px 28px rgba(20,24,29,.07);
  --geometry: #0072B2; --quantum: #E69F00; --computer: #009E73; --program: #CC79A7;
  --meta: #8e44ad; --genesis: #1e9e6a; --shadow: #c0392b; --mgs: #0072B2;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 15px; line-height: 1.5;
  -webkit-font-smoothing: antialiased; overflow: hidden;
}
a { color: var(--accent); }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--panel); padding: 10px 16px; border: 1px solid var(--rule);
}
.skip:focus { left: 8px; top: 8px; }

/* ---------- header ---------- */
header {
  height: var(--hdr); display: flex; align-items: center; gap: 16px;
  padding: 0 14px; border-bottom: 1px solid var(--rule);
  background: var(--panel); position: relative; z-index: 30;
}
.brand { display: flex; align-items: center; gap: 9px; flex: none; }
.mark { width: 26px; height: 23px; color: var(--ink); flex: none; }
h1 {
  font-size: 16px; margin: 0; font-weight: 600; letter-spacing: -.015em;
  font-family: var(--serif); white-space: nowrap;
}
h1 span { color: var(--ink-3); font-style: italic; }

.controls { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.searchwrap { position: relative; }
#search {
  width: 232px; height: 32px; padding: 0 11px; font: inherit; font-size: 13px;
  background: var(--bg-2); color: var(--ink);
  border: 1px solid var(--rule); border-radius: 6px; outline: none;
}
#search:focus { border-color: var(--accent); background: var(--panel); }
#search::placeholder { color: var(--ink-3); }

#results {
  position: absolute; top: 38px; right: 0; width: 340px; max-height: 60vh;
  overflow-y: auto; background: var(--panel); border: 1px solid var(--rule);
  border-radius: 8px; box-shadow: var(--shadow); padding: 5px; z-index: 40;
}
#results .r {
  display: block; width: 100%; text-align: left; padding: 7px 9px;
  background: none; border: 0; border-radius: 5px; cursor: pointer;
  color: var(--ink); font: inherit; font-size: 13px; line-height: 1.35;
}
#results .r:hover, #results .r[aria-selected="true"] { background: var(--bg-2); }
#results .r b { font-weight: 600; display: block; }
#results .r small { color: var(--ink-3); font-size: 11px; font-family: var(--mono); }
#results .none { padding: 12px; color: var(--ink-3); font-size: 13px; }

.btn {
  height: 32px; padding: 0 12px; font: inherit; font-size: 13px;
  background: var(--bg-2); color: var(--ink); border: 1px solid var(--rule);
  border-radius: 6px; cursor: pointer; white-space: nowrap;
}
.btn:hover { border-color: var(--ink-3); }
.btn.icon { width: 34px; padding: 0; display: grid; place-items: center; }
.btn.icon svg { width: 17px; height: 17px; }

.menu {
  position: absolute; top: calc(var(--hdr) + 6px); right: 96px; width: 400px; max-width: calc(100vw - 24px);
  background: var(--panel); border: 1px solid var(--rule); border-radius: 10px;
  box-shadow: var(--shadow); padding: 7px; z-index: 45;
}
.menu h3 {
  margin: 6px 9px 8px; font-size: 11px; letter-spacing: .09em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
}
.menu .p {
  display: block; width: 100%; text-align: left; padding: 9px 10px; margin-bottom: 2px;
  background: none; border: 0; border-radius: 7px; cursor: pointer; color: var(--ink); font: inherit;
}
.menu .p:hover { background: var(--bg-2); }
.menu .p b { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 2px; }
.menu .p span { display: block; font-size: 12px; color: var(--ink-2); line-height: 1.42; }
.menu .p em { font-style: normal; font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); }

/* ---------- layout ---------- */
main { display: flex; height: calc(100vh - var(--hdr)); height: calc(100dvh - var(--hdr)); }
#graphpane { position: relative; flex: 1 1 auto; min-width: 0; background: var(--bg); }
#canvas { display: block; width: 100%; height: 100%; cursor: grab; touch-action: none; }
#canvas.drag { cursor: grabbing; }

.legend {
  position: absolute; left: 12px; bottom: 12px; display: flex; flex-direction: column; gap: 7px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: blur(8px); border: 1px solid var(--rule);
  border-radius: 9px; padding: 9px 10px; max-width: calc(100% - 24px);
}
.lg-group { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.lg-title {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-3); width: 52px; flex: none;
}
.chip {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 8px 3px 6px;
  font: inherit; font-size: 11.5px; background: none; color: var(--ink-2);
  border: 1px solid var(--rule); border-radius: 20px; cursor: pointer; opacity: .42;
}
.chip.on { opacity: 1; color: var(--ink); border-color: var(--ink-3); }
.chip em { font-style: normal; font-family: var(--mono); font-size: 10px; color: var(--ink-3); }
.chip i { width: 9px; height: 9px; border-radius: 50%; background: var(--c); flex: none; }
.chip i.t-fuller { background: var(--ink-2); }
.chip i.t-downstream { background: none; border: 1.5px dashed var(--ink-2); }
.chip i.t-contested {
  background: repeating-linear-gradient(45deg, var(--ink-2) 0 1.5px, transparent 1.5px 3.5px);
  border: 1px solid var(--ink-2);
}

.hint {
  position: absolute; top: 12px; left: 12px; font-family: var(--mono); font-size: 10.5px;
  color: var(--ink-3); letter-spacing: .02em; pointer-events: none;
  transition: opacity .5s; padding: 4px 8px; border-radius: 5px;
  background: color-mix(in srgb, var(--panel) 70%, transparent);
}
.hint.gone { opacity: 0; }

/* ---------- detail pane ---------- */
#detail {
  flex: 0 0 452px; max-width: 46vw; border-left: 1px solid var(--rule);
  background: var(--panel); overflow-y: auto; overscroll-behavior: contain; outline: none;
}
#detailInner { padding: 22px 26px 60px; }

.empty { color: var(--ink-2); }
.empty h2 {
  font-family: var(--serif); font-size: 25px; line-height: 1.2; margin: 6px 0 14px;
  color: var(--ink); font-weight: 600; letter-spacing: -.02em;
}
.empty p { margin: 0 0 13px; font-size: 14.5px; line-height: 1.62; }
.empty .lede { font-family: var(--serif); font-size: 16px; color: var(--ink); }
.empty ul { margin: 0 0 13px; padding-left: 18px; font-size: 14px; line-height: 1.6; }
.empty li { margin-bottom: 6px; }
.statline {
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
  border-top: 1px solid var(--rule-2); padding-top: 12px; margin-top: 18px; line-height: 1.8;
}

.dom {
  display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono);
  font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--dc);
  font-weight: 600;
}
.dom::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--dc); }

h2.node-t {
  font-family: var(--serif); font-size: 26px; line-height: 1.16; letter-spacing: -.022em;
  margin: 9px 0 12px; font-weight: 600;
}

.tierband {
  display: flex; align-items: flex-start; gap: 9px; padding: 9px 11px; margin: 0 0 16px;
  border-radius: 7px; font-size: 12.5px; line-height: 1.48;
}
.tierband b { display: block; font-size: 11px; letter-spacing: .07em; text-transform: uppercase; margin-bottom: 2px; }
.tierband.fuller { background: var(--bg-2); color: var(--ink-2); }
.tierband.downstream {
  background: none; border: 1.5px dashed var(--rule); color: var(--ink-2);
}
.tierband.contested {
  background: repeating-linear-gradient(45deg,
    color-mix(in srgb, var(--quantum) 9%, transparent) 0 7px,
    transparent 7px 14px);
  border: 1px solid color-mix(in srgb, var(--quantum) 45%, transparent); color: var(--ink-2);
}

.cites { margin: 0 0 17px; display: flex; flex-wrap: wrap; gap: 5px; }
.cite {
  font-family: var(--mono); font-size: 10.5px; padding: 3px 7px; border-radius: 4px;
  background: var(--bg-2); color: var(--ink-2); border: 1px solid var(--rule-2);
}
.cite b { color: var(--ink); font-weight: 600; }

.body p {
  font-family: var(--serif); font-size: 16px; line-height: 1.66; margin: 0 0 15px;
  color: var(--ink); hanging-punctuation: first;
}
blockquote.pull {
  margin: 18px 0; padding: 13px 16px; border-left: 2.5px solid var(--dc);
  background: var(--bg-2); border-radius: 0 6px 6px 0;
}
blockquote.pull p {
  font-family: var(--serif); font-style: italic; font-size: 15.5px;
  line-height: 1.55; margin: 0 0 6px;
}
blockquote.pull cite {
  font-family: var(--mono); font-size: 10.5px; font-style: normal; color: var(--ink-3);
}

.failbox {
  margin: 17px 0; padding: 12px 14px; border-radius: 7px;
  border: 1px solid color-mix(in srgb, var(--quantum) 50%, transparent);
  background: color-mix(in srgb, var(--quantum) 7%, transparent);
}
.failbox b {
  display: block; font-size: 10.5px; letter-spacing: .09em; text-transform: uppercase;
  color: var(--ink-2); margin-bottom: 5px;
}
.failbox p { margin: 0; font-size: 13.5px; line-height: 1.55; color: var(--ink); font-family: var(--sans); }

figure.fig { margin: 18px 0; }
figure.fig canvas {
  width: 100%; height: 220px; display: block; border: 1px solid var(--rule-2);
  border-radius: 8px; background: var(--bg-2); cursor: grab; touch-action: none;
}
figure.fig canvas:active { cursor: grabbing; }
figure.fig figcaption {
  font-family: var(--mono); font-size: 10.5px; color: var(--ink-3);
  margin-top: 7px; display: flex; justify-content: space-between; gap: 10px;
}
figure.fig button {
  font: inherit; font-family: var(--mono); font-size: 10.5px; background: none;
  border: 0; color: var(--accent); cursor: pointer; padding: 0; text-decoration: underline;
}

.reflist { margin: 17px 0 0; padding: 0; list-style: none; }
.reflist li { margin-bottom: 6px; font-size: 12.5px; line-height: 1.45; }
.reflist a { color: var(--accent); }

h3.sec {
  font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3);
  margin: 26px 0 10px; font-weight: 600; border-top: 1px solid var(--rule-2); padding-top: 14px;
}
.links { display: flex; flex-direction: column; gap: 1px; }
.lnk {
  display: grid; grid-template-columns: 74px 1fr; gap: 9px; align-items: baseline;
  padding: 6px 8px; margin-left: -8px; background: none; border: 0; border-radius: 5px;
  cursor: pointer; color: var(--ink); font: inherit; font-size: 13.5px; text-align: left; line-height: 1.35;
}
.lnk:hover { background: var(--bg-2); }
.lnk .rel {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .05em; text-transform: uppercase;
  color: var(--ink-3); text-align: right;
}
.lnk .to { display: flex; align-items: baseline; gap: 6px; }
.lnk .dotm { width: 7px; height: 7px; border-radius: 50%; background: var(--dc); flex: none; transform: translateY(-1px); }

/* ---------- path bar ---------- */
#pathbar {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 18px; z-index: 50;
  display: flex; align-items: center; gap: 4px; padding: 6px;
  background: var(--panel); border: 1px solid var(--rule); border-radius: 30px; box-shadow: var(--shadow);
}
/* `display:flex` above outranks the UA [hidden] rule, so restate it explicitly.
   Same hazard for any other element that sets display and toggles `hidden`. */
#pathbar[hidden], #results[hidden], #pathsMenu[hidden] { display: none; }
#pathInfo { padding: 0 10px; text-align: center; min-width: 200px; }
#pathInfo strong { display: block; font-size: 12.5px; font-weight: 600; line-height: 1.2; }
#pathInfo span { font-family: var(--mono); font-size: 10px; color: var(--ink-3); }
.pb {
  width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--rule);
  background: var(--bg-2); color: var(--ink); cursor: pointer; font-size: 13px; flex: none;
}
.pb:hover:not(:disabled) { border-color: var(--ink-3); }
.pb:disabled { opacity: .3; cursor: default; }
.pb.x { background: none; border: 0; color: var(--ink-3); }

.pathnote {
  margin: 0 0 16px; padding: 11px 13px; border-radius: 7px;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-left: 2.5px solid var(--accent);
  font-size: 13.5px; line-height: 1.52; color: var(--ink);
}
.pathnote b {
  display: block; font-family: var(--mono); font-size: 9.5px; letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 4px; font-weight: 600;
}

.noscript {
  position: fixed; inset: 0; background: var(--bg); padding: 40px; z-index: 90;
  font-family: var(--serif); max-width: 640px; margin: auto; height: fit-content; top: 12vh;
}
.noscript h2 { font-size: 22px; margin: 0 0 12px; }

/* ---------- scenarios + indicators ---------- */
.cite.ok { border-color: color-mix(in srgb, var(--genesis) 55%, transparent); }
.cite.ok b { color: var(--genesis); }

.scen { display: flex; flex-direction: column; gap: 7px; }
.sc {
  padding: 9px 11px; border-radius: 6px; background: var(--bg-2);
  border-left: 2.5px solid var(--ink-3);
}
.sc b {
  display: block; font-family: var(--mono); font-size: 9.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 3px;
}
.sc p { margin: 0; font-size: 13px; line-height: 1.5; }
.sc-fast    { border-left-color: var(--genesis); }
.sc-base    { border-left-color: var(--mgs); }
.sc-stalled { border-left-color: var(--shadow); }

.indic {
  margin: 16px 0 0; padding: 11px 13px; border-radius: 7px;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-left: 2.5px solid var(--accent);
}
.indic b {
  display: block; font-family: var(--mono); font-size: 9.5px; letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 3px;
}
.indic b ~ b { margin-top: 9px; }
.indic p { margin: 0; font-size: 13px; line-height: 1.5; color: var(--ink); }

/* ---------- crosswalk ---------- */
.xhint { font-size: 12.5px; color: var(--ink-3); margin: 0 0 20px; }
h3.xq {
  font-family: var(--serif); font-size: 17px; font-weight: 600; letter-spacing: -.012em;
  margin: 24px 0 8px; padding-top: 15px; border-top: 1px solid var(--rule-2); color: var(--ink);
}
h3.xq:first-of-type { border-top: 0; padding-top: 0; margin-top: 20px; }
.xrow {
  display: grid; grid-template-columns: 88px 1fr; gap: 10px; align-items: baseline;
  width: calc(100% + 16px); margin-left: -8px; padding: 7px 8px; text-align: left;
  background: none; border: 0; border-radius: 6px; cursor: pointer; color: var(--ink); font: inherit;
}
.xrow:hover { background: var(--bg-2); }
.xdom {
  display: inline-flex; align-items: center; gap: 5px; font-family: var(--mono);
  font-size: 9.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--dc);
  font-weight: 600; white-space: nowrap;
}
.xdom i { width: 7px; height: 7px; border-radius: 50%; background: var(--dc); flex: none; }
.xtext { font-size: 13.5px; line-height: 1.45; }
.xfoot {
  margin: 26px 0 0; padding: 11px 13px; border-radius: 7px; font-size: 12.5px;
  line-height: 1.5; color: var(--ink-2);
  border-left: 2.5px solid var(--rule); background: var(--bg-2);
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  body { overflow: auto; }
  main { flex-direction: column; height: auto; }
  #graphpane { height: 56vh; flex: none; }
  #detail { flex: none; max-width: none; width: 100%; border-left: 0; border-top: 1px solid var(--rule); }
  #search { width: 150px; }
  .menu { right: 12px; }
  h1 { font-size: 14px; }
  .lg-title { display: none; }
  .legend { left: 8px; bottom: 8px; padding: 7px; }
}
@media (max-width: 760px) {
  #aboutBtn { display: none; }
}
@media (max-width: 560px) {
  #crossBtn { display: none; }
  #search { width: 116px; }
  .xrow { grid-template-columns: 1fr; gap: 2px; }
  #detailInner { padding: 18px 17px 50px; }
  h2.node-t { font-size: 22px; }
  .body p { font-size: 15.5px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}