/* ════════════════════════════════════════════════════════════════
   THE SIGNAL LAYER — ELEVATED MASTER STYLESHEET
   Companion Health · Platform Constitution v1.0
   ════════════════════════════════════════════════════════════════ */

/* Faire Octave (display) — self-hosted */
@font-face { font-family: 'Faire Octave'; src: url('fonts/FaireOctave-Regular.otf') format('opentype'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Faire Octave'; src: url('fonts/FaireOctave-Variable.ttf') format('truetype-variations'); font-weight: 100 900; font-style: normal; font-display: swap; }

/* Suisse Intl (body) — self-hosted */
@font-face { font-family: 'Suisse Intl'; src: url('fonts/SuisseIntl-Light.ttf') format('truetype'); font-weight: 300; font-style: normal; font-display: swap; }
@font-face { font-family: 'Suisse Intl'; src: url('fonts/SuisseIntl-Book.ttf') format('truetype'); font-weight: 350; font-style: normal; font-display: swap; }
@font-face { font-family: 'Suisse Intl'; src: url('fonts/SuisseIntl-Regular.ttf') format('truetype'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Suisse Intl'; src: url('fonts/SuisseIntl-Medium.ttf') format('truetype'); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: 'Suisse Intl'; src: url('fonts/SuisseIntl-Bold.ttf') format('truetype'); font-weight: 700; font-style: normal; font-display: swap; }

/* Suisse Intl Mono — labels, numbers, code */
@font-face { font-family: 'Suisse Intl Mono'; src: url('fonts/SuisseIntlMono-Regular.ttf') format('truetype'); font-weight: 400; font-style: normal; font-display: swap; }

:root {
  --paper:       #F4F2EB;
  --paper-warm:  #ECE8DF;
  --paper-deep:  #E4DFD3;
  --paper-plate: #FAF9F4;
  --ink:         #070D08;
  --ink-soft:    #1B2A1E;
  --ink-mid:     #38563C;
  --ink-muted:   #6A8A6E;
  --ink-light:   #9AB09E;
  --black:       #060B07;
  --black-deep:  #0A130C;
  --black-plate: #0C160F;
  --signal:        #B1DAB9;
  --signal-bright: #C9EDD0;
  --signal-deep:   #0E3E15;
  --telemetry:     #9FB8A4;
  --telemetry-soft:#D4E2D6;
  --line:        rgba(7,13,8,0.13);
  --line-soft:   rgba(7,13,8,0.07);
  --line-faint:  rgba(7,13,8,0.045);
  --line-signal: rgba(177,218,185,0.22);
  --line-on-dark:rgba(177,218,185,0.16);
  --risk-high: #C0392B;
  --risk-mid:  #E67E22;
  --risk-low:  #27AE60;
  --f-display: 'Faire Octave', Georgia, 'Times New Roman', serif;
  --f-body:    'Suisse Intl', -apple-system, system-ui, sans-serif;
  --f-mono:    'Suisse Intl Mono', ui-monospace, Menlo, monospace;
  /* v8 diagram tokens */
  --dg-ground: #F5F4EF;
  --dg-ink:    #0B4756;
  --dg-companion: #2F5D3A;
  --dg-sage:   #D6E8DA;
  --dg-sage-soft: #E8F1EA;
  --dg-slate:  #D6DDE4;
  --dg-sand:   #E8E2D6;
  --dg-plum:   #3E1B3A;
  --dg-alert:  #B23A3A;
  --dg-card-shadow: 0 2px 14px rgba(11,71,86,0.05);
  --s1: 8px; --s2: 16px; --s3: 24px; --s4: 32px;
  --s5: 48px; --s6: 64px; --s7: 96px; --s8: 132px; --s9: 184px; --s10: 240px;
  --gutter: 120px;
  --content-max: 1140px;
  --spine: 60px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; background: var(--paper); }
body {
  font-family: var(--f-body);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
::selection { background: var(--signal); color: var(--ink); }

.ambient { position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 1; }
.ambient svg { width: 100%; height: 100%; display: block; }

.spine {
  position: fixed; top: 0; bottom: 0; left: var(--spine);
  width: 1px; z-index: 1; pointer-events: none;
  background: linear-gradient(to bottom, transparent 0, var(--line) 120px, var(--line) calc(100% - 200px), transparent 100%);
}
.spine::before {
  content: ""; position: absolute; left: -2px; top: var(--spine-y, 50vh);
  width: 5px; height: 5px; background: var(--signal-deep);
  border-radius: 50%; transition: top 0.18s linear;
}
.baseline { display: none; }
main { padding-top: 72px; position: relative; z-index: 2; }

.colophon {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--s3) var(--gutter);
  background: rgba(244, 242, 235, 0.86);
  backdrop-filter: blur(10px) saturate(1.1); -webkit-backdrop-filter: blur(10px) saturate(1.1);
  z-index: 100; border-bottom: 1px solid var(--line-soft);
}
.colophon .brand { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.26em; text-transform: uppercase; color: var(--ink); display: inline-flex; align-items: center; text-decoration: none; }
.colophon .brand img { height: 22px; width: auto; display: block; }
.colophon .doc-meta { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-muted); display: flex; align-items: center; gap: 10px; }
.colophon .doc-meta span { color: var(--ink); }
.colophon .doc-meta::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--signal-deep); box-shadow: 0 0 0 0 rgba(14,62,21,0.4);
  animation: live-pulse 3.2s ease-out infinite;
}
@keyframes live-pulse { 0% { box-shadow: 0 0 0 0 rgba(14,62,21,0.35); } 70%,100% { box-shadow: 0 0 0 7px rgba(14,62,21,0); } }

section {
  padding: var(--s9) var(--gutter) var(--s8);
  position: relative;
  border-bottom: 1px solid var(--line-soft);
}
section:nth-of-type(even) { background: linear-gradient(to bottom, var(--paper-warm), var(--paper-warm)); }
.section-inner { max-width: var(--content-max); margin: 0 auto; position: relative; }

.section-header { display: grid; grid-template-columns: 1fr; gap: var(--s2); margin-bottom: var(--s6); align-items: baseline; }
.section-marker { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-muted); display: block; }
.section-marker .num { white-space: nowrap; color: var(--ink); }
.section-marker .verb { display: block; margin-top: 8px; color: var(--ink-mid); font-size: 10px; letter-spacing: 0.18em; }

.t-h1 { font-family: var(--f-display); font-size: clamp(34px, 5vw, 64px); line-height: 1.04; letter-spacing: -0.028em; color: var(--ink); font-weight: 400; max-width: 16ch; text-wrap: balance; }
.t-h2 { font-family: var(--f-display); font-size: clamp(24px, 3vw, 38px); line-height: 1.14; letter-spacing: -0.02em; color: var(--ink); font-weight: 400; }
.t-lead { font-family: var(--f-display); font-size: clamp(21px, 2.3vw, 30px); line-height: 1.4; letter-spacing: -0.014em; color: var(--ink-soft); font-weight: 400; max-width: 30ch; margin-top: var(--s5); text-wrap: pretty; }
.t-body { font-family: var(--f-body); font-size: 16.5px; line-height: 1.72; color: var(--ink-mid); max-width: 62ch; margin-top: var(--s4); }
.t-body p + p { margin-top: var(--s3); }
.t-label { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-muted); }

.fetch-annot { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.05em; color: var(--ink-muted); background: rgba(177,218,185,0.16); padding: 2px 7px; white-space: nowrap; }

#s1 { padding-top: var(--s10); padding-bottom: var(--s9); min-height: 96vh; display: flex; align-items: center; }
.opening-eyebrow { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.26em; text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--s6); display: flex; align-items: center; gap: 12px; }
.opening-eyebrow::after { content: ""; flex: 0 0 80px; height: 1px; background: var(--line); }
.t-hero { font-family: var(--f-display); font-size: clamp(56px, 11vw, 148px); line-height: 0.94; letter-spacing: -0.045em; color: var(--ink); font-weight: 400; margin-bottom: var(--s4); }
.t-subtitle { font-family: var(--f-display); font-size: clamp(20px, 2.6vw, 32px); line-height: 1.3; letter-spacing: -0.016em; color: var(--ink-mid); max-width: 24ch; }
.opening-statement { margin-top: var(--s8); display: grid; grid-template-columns: 1fr; gap: var(--s3); max-width: 760px; padding-top: var(--s4); border-top: 1px solid var(--line); }
.lead-line { font-family: var(--f-display); font-size: clamp(22px, 2.6vw, 34px); line-height: 1.24; letter-spacing: -0.018em; color: var(--ink); }
.sub-line { font-family: var(--f-body); font-size: 16px; line-height: 1.7; color: var(--ink-mid); max-width: 54ch; }

.blind-spot-viz, .anatomy-frame, .three-tier-frame, .architecture-frame,
.ecosystem-frame, .replay-frame, .fetch-formal-block, .fetch-canonical {
  margin-top: var(--s7); position: relative;
}
.blind-spot-viz .label, .anatomy-frame > .label, .replay-frame .header .title,
.fetch-formal-block > .label, .fetch-canonical > .label {
  font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--s4);
  padding-bottom: var(--s2); border-bottom: 1px solid var(--line);
  display: block;
}
.blind-spot-viz svg, .anatomy-frame svg, .three-tier-frame svg,
.ecosystem-frame svg { width: 100%; height: auto; display: block; }
.blind-spot-viz svg { padding: var(--s3) 0; }

.specimen { position: relative; padding: var(--s5) var(--s5) var(--s4); background: var(--paper-plate); box-shadow: 0 1px 0 var(--line), 0 30px 60px -50px rgba(7,13,8,0.5); }
section:nth-of-type(even) .specimen { background: #FBFAF6; }
.specimen::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line-faint) 1px, transparent 1px), linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size: 32px 32px; background-position: -1px -1px;
  opacity: 0.6;
}

.primitive-hierarchy { margin-top: var(--s7); border-top: 2px solid var(--ink); }
.primitive-hierarchy > .label { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-muted); padding: var(--s3) 0 var(--s2); display: block; }
.primitive-card { display: grid; grid-template-columns: 132px 1fr; gap: var(--s5); padding: var(--s5) 0; border-top: 1px solid var(--line); position: relative; }
.primitive-card .p-num { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--ink-muted); line-height: 1.5; }
.primitive-card .p-num .ord { font-family: var(--f-display); font-size: 40px; letter-spacing: -0.02em; color: var(--signal-deep); display: block; margin-bottom: 4px; line-height: 1; }
.primitive-card .p-content { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--s5); }
.p-main .name { font-family: var(--f-display); font-size: 27px; letter-spacing: -0.016em; color: var(--ink); margin-bottom: var(--s2); }
.p-main .def { font-family: var(--f-body); font-size: 14.5px; line-height: 1.62; color: var(--ink-mid); margin-bottom: var(--s3); }
.p-main .api { font-family: var(--f-mono); font-size: 11.5px; letter-spacing: 0.02em; color: var(--signal-deep); background: rgba(177,218,185,0.18); padding: 4px 9px; display: inline-block; }
.p-main .states { display: flex; flex-wrap: wrap; gap: 6px; margin-top: var(--s3); }
.p-main .state { font-family: var(--f-mono); font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-muted); padding: 3px 8px; border: 1px solid var(--line); }
.p-meta { padding-top: 6px; }
.p-meta .row { display: grid; grid-template-columns: 92px 1fr; gap: var(--s2); padding: var(--s1) 0; border-bottom: 1px solid var(--line-soft); }
.p-meta .row .k { font-family: var(--f-mono); font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-light); padding-top: 3px; }
.p-meta .row .v { font-family: var(--f-body); font-size: 13px; line-height: 1.5; color: var(--ink-mid); }
.p-meta .visual-block { margin-top: var(--s3); }
.p-meta .visual-block svg { width: 100%; height: auto; display: block; opacity: 0.92; }

.derived-block { margin: var(--s8) calc(-1 * var(--gutter)) 0; padding: var(--s8) var(--gutter); background: var(--black-deep); color: var(--paper); position: relative; }
.derived-block .inner-wrap, .derived-block > * { max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.derived-block .header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: var(--s2); margin-bottom: var(--s2); }
.derived-block .header h3 { font-family: var(--f-display); font-size: clamp(24px, 2.6vw, 34px); letter-spacing: -0.018em; color: var(--paper); font-weight: 400; }
.derived-block .header .sub { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--signal); }
.derived-block .t-body { color: rgba(255,255,255,0.72); max-width: 64ch; }
.derived-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-on-dark); border: 1px solid var(--line-on-dark); margin-top: var(--s6); }
.derived-item { background: var(--black-deep); padding: var(--s4); position: relative; }
.derived-item.featured { grid-column: span 3; background: rgba(177,218,185,0.06); border-left: 2px solid var(--signal); }
.derived-item .badge { font-family: var(--f-mono); font-size: 9px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--signal); margin-bottom: var(--s2); display: inline-block; }
.derived-item .name { font-family: var(--f-display); font-size: 21px; letter-spacing: -0.012em; color: var(--paper); margin-bottom: var(--s1); }
.derived-item.featured .name { font-size: 28px; }
.derived-item .desc { font-family: var(--f-body); font-size: 13px; line-height: 1.55; color: rgba(255,255,255,0.62); max-width: 64ch; }

.anatomy-frame { margin-top: var(--s8); }
.anatomy-frame.plane-dark {
  margin-left: calc(-1 * var(--gutter)); margin-right: calc(-1 * var(--gutter));
  padding: var(--s7) var(--gutter) var(--s6);
  background: var(--black); color: var(--paper);
}
.anatomy-frame.plane-dark > * { max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.anatomy-frame.plane-dark > .label { color: var(--signal); border-bottom-color: var(--line-on-dark); }
.anatomy-frame.plane-dark svg { width: 100%; height: auto; display: block; }
.anatomy-caption { font-family: var(--f-body); font-size: 13.5px; line-height: 1.66; color: rgba(255,255,255,0.6); max-width: 76ch; margin-top: var(--s5); padding-top: var(--s3); border-top: 1px solid var(--line-on-dark); }

.identity-statement { margin-top: var(--s6); padding: 0 0 0 var(--s5); border-left: 2px solid var(--signal-deep); }
.identity-statement .statement { font-family: var(--f-display); font-size: clamp(24px, 3vw, 38px); line-height: 1.22; letter-spacing: -0.02em; color: var(--ink); max-width: 22ch; text-wrap: balance; }
.identity-statement .annotation { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-muted); margin-top: var(--s3); }
.three-tier-frame { margin-top: var(--s7); }
.three-tier-frame .t-label { display: block; padding-bottom: var(--s2); border-bottom: 1px solid var(--line); margin-bottom: var(--s4); }

.fetch-formal-block { margin: var(--s7) calc(-1 * var(--gutter)) 0; padding: var(--s7) var(--gutter); background: var(--black-deep); color: var(--paper); }
.fetch-formal-block > * { max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.fetch-formal-block > .label { color: var(--signal); border-bottom-color: var(--line-on-dark); }
.fetch-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s7); margin-top: var(--s5); }
.fetch-grid h4 { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--signal); margin-bottom: var(--s3); padding-bottom: var(--s2); border-bottom: 1px solid var(--line-on-dark); font-weight: 400; }
.fetch-grid .endpoint { display: block; font-family: var(--f-mono); font-size: 13px; line-height: 1.5; color: rgba(255,255,255,0.86); padding: 7px 0; border-bottom: 1px solid rgba(177,218,185,0.08); letter-spacing: 0.01em; }
.fetch-grid .endpoint .verb { color: var(--signal); display: inline-block; width: 46px; }
.fetch-canonical { margin: 0 calc(-1 * var(--gutter)); padding: var(--s6) var(--gutter) var(--s7); background: var(--black); color: var(--paper); }
.fetch-canonical > * { max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.fetch-canonical > .label { color: rgba(177,218,185,0.7); border-bottom-color: var(--line-on-dark); }
.fetch-canonical pre { font-family: var(--f-mono); font-size: 12.5px; line-height: 1.85; color: rgba(255,255,255,0.82); white-space: pre; overflow-x: auto; padding: var(--s4) 0 0; max-width: 100%; }
.fetch-canonical .json-key { color: rgba(177,218,185,0.62); }
.fetch-canonical .json-str { color: var(--signal-bright); }
.fetch-canonical .json-num { color: #E8C98B; }
.fetch-canonical .json-cmt { color: rgba(177,218,185,0.36); font-style: italic; }

.engine-process { margin-top: var(--s7); border-top: 2px solid var(--ink); counter-reset: eng; }
.engine-step { display: grid; grid-template-columns: 92px 1fr; gap: var(--s5); padding: var(--s5) 0; border-top: 1px solid var(--line); align-items: start; position: relative; transition: background 0.2s ease; }
.engine-step:first-child { border-top: none; }
.engine-step:hover { background: rgba(177,218,185,0.05); }
.engine-step .step-num { position: relative; }
.engine-step .step-num .ord { font-family: var(--f-display); font-size: 48px; line-height: 0.9; letter-spacing: -0.03em; color: var(--ink-light); }
.engine-step:hover .step-num .ord { color: var(--signal-deep); }
.engine-step .step-name { font-family: var(--f-display); font-size: 26px; letter-spacing: -0.016em; color: var(--ink); grid-column: 2; margin-bottom: var(--s2); }
.engine-step .step-desc { font-family: var(--f-body); font-size: 15px; line-height: 1.66; color: var(--ink-mid); grid-column: 2; max-width: 70ch; }
.engine-step .step-api { display: inline-block; margin-top: var(--s2); font-family: var(--f-mono); font-size: 11.5px; letter-spacing: 0.02em; color: var(--signal-deep); background: rgba(177,218,185,0.18); padding: 3px 9px; }

.replay-frame { margin: var(--s8) calc(-1 * var(--gutter)) 0; padding: var(--s7) var(--gutter) var(--s6); background: var(--black); color: var(--paper); }
.replay-frame > * { max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.replay-frame .header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: var(--s2); margin-bottom: var(--s5); padding-bottom: var(--s3); border-bottom: 1px solid var(--line-on-dark); }
.replay-frame .header .title { font-family: var(--f-display); font-size: clamp(20px, 2.2vw, 28px); letter-spacing: -0.016em; color: var(--paper); border: none; padding: 0; margin: 0; text-transform: none; }
.replay-frame .header .meta { font-family: var(--f-mono); font-size: 10.5px; letter-spacing: 0.08em; color: rgba(177,218,185,0.6); }
.replay-frame svg { width: 100%; height: auto; display: block; }

.architecture-frame { margin: var(--s8) calc(-1 * var(--gutter)) 0; padding: var(--s7) var(--gutter) var(--s7); background: var(--black); color: var(--paper); }
.architecture-frame > * { max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.architecture-frame > .t-label { color: var(--signal); display: block; padding-bottom: var(--s2); border-bottom: 1px solid var(--line-on-dark); margin-bottom: var(--s5); }
.architecture-stack { display: flex; flex-direction: column; }
.arch-layer { display: grid; grid-template-columns: 92px 220px 1fr 240px; gap: var(--s4); align-items: baseline; padding: var(--s3) var(--s3); border-top: 1px solid var(--line-on-dark); transition: background 0.2s ease; }
.arch-layer:first-child { border-top: none; }
.arch-layer:hover { background: rgba(177,218,185,0.05); }
.arch-layer .L { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.12em; color: rgba(255,255,255,0.4); }
.arch-layer .L .n { color: rgba(255,255,255,0.85); }
.arch-layer .layer-name { font-family: var(--f-display); font-size: 21px; letter-spacing: -0.012em; color: var(--paper); }
.arch-layer .layer-fn { font-family: var(--f-body); font-size: 13.5px; line-height: 1.55; color: rgba(255,255,255,0.6); }
.arch-layer .layer-tech { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.06em; color: rgba(177,218,185,0.5); line-height: 1.6; }
.arch-layer.signal-engine { background: rgba(177,218,185,0.1); border-top: 1px solid var(--signal); margin: 1px 0; box-shadow: inset 2px 0 0 var(--signal); }
.arch-layer.signal-engine .L, .arch-layer.signal-engine .L .n { color: var(--signal-bright); }
.arch-layer.signal-engine .layer-name { color: var(--signal-bright); }
.arch-layer.signal-engine .layer-fn { color: rgba(255,255,255,0.78); }
.arch-layer.signal-engine .layer-tech { color: var(--signal); }

.interpretation-cross { margin-top: var(--s5); padding: var(--s5); background: var(--black-deep); color: var(--paper); border-left: 2px solid var(--signal); }
.interpretation-cross .header { margin-bottom: var(--s2); }
.interpretation-cross .label { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--signal); margin-bottom: 6px; }
.interpretation-cross .name { font-family: var(--f-display); font-size: 26px; letter-spacing: -0.016em; color: var(--paper); }
.interpretation-cross .desc { font-family: var(--f-body); font-size: 14px; line-height: 1.62; color: rgba(255,255,255,0.72); max-width: 76ch; }
.interpretation-cross .briefs { display: flex; flex-wrap: wrap; gap: var(--s1); margin-top: var(--s4); }
.interpretation-cross .brief-chip { font-family: var(--f-mono); font-size: 9px; letter-spacing: 0.14em; color: var(--signal); padding: 5px 11px; border: 1px solid rgba(177,218,185,0.3); }

.ecosystem-frame { margin-top: var(--s7); }
.three-tier-frame.diagram-dark, .ecosystem-frame.diagram-dark {
  margin: var(--s7) calc(-1 * var(--gutter)) 0;
  padding: var(--s7) var(--gutter) var(--s7);
  background: var(--black); color: var(--paper);
}
.three-tier-frame.diagram-dark > *, .ecosystem-frame.diagram-dark > * { max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.three-tier-frame.diagram-dark > .t-label, .ecosystem-frame.diagram-dark > .t-label { color: var(--signal); border-bottom-color: var(--line-on-dark); }
.three-tier-frame.diagram-dark svg, .ecosystem-frame.diagram-dark svg { width: 100%; height: auto; display: block; margin-top: var(--s2); }
.ecosystem-frame .t-label { display: block; padding-bottom: var(--s2); border-bottom: 1px solid var(--line); margin-bottom: var(--s5); }
.consumer-list { margin-top: var(--s7); border-top: 2px solid var(--ink); }
.consumer-list .item { display: flex; justify-content: space-between; align-items: baseline; gap: var(--s4); padding: var(--s4) 0; border-top: 1px solid var(--line); transition: padding-left 0.2s ease; }
.consumer-list .item:first-child { border-top: none; }
.consumer-list .item:hover { padding-left: var(--s2); }
.consumer-list .item .name { font-family: var(--f-display); font-size: 25px; letter-spacing: -0.014em; color: var(--ink); }
.consumer-list .item .verb { font-family: var(--f-body); font-size: 13px; line-height: 1.5; color: var(--ink-muted); margin-top: 4px; }
.consumer-list .item .tag { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.1em; color: var(--signal-deep); white-space: nowrap; }

.gate-preamble { padding: var(--s10) var(--gutter) var(--s8); background: var(--paper-deep); border-bottom: 1px solid var(--line-soft); position: relative; z-index: 2; }
.gate-preamble .inner { max-width: var(--content-max); margin: 0 auto; }
.gate-preamble .eyebrow { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--s5); display: flex; align-items: center; gap: 12px; }
.gate-preamble .eyebrow::after { content: ""; flex: 0 0 80px; height: 1px; background: var(--line); }
.gate-preamble h1 { font-family: var(--f-display); font-size: clamp(40px, 6.5vw, 96px); line-height: 0.98; letter-spacing: -0.035em; color: var(--ink); font-weight: 400; max-width: 14ch; margin-bottom: var(--s6); text-wrap: balance; }
.gate-preamble .lead { font-family: var(--f-display); font-size: clamp(20px, 2.2vw, 27px); line-height: 1.4; letter-spacing: -0.012em; color: var(--ink-mid); font-weight: 400; max-width: 60ch; }

.source-signal { margin-top: var(--s6); padding: var(--s4); background: var(--black); border-left: 2px solid var(--signal); display: grid; grid-template-columns: 200px 1fr 220px; gap: var(--s4); align-items: center; }
.source-signal .source-label { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: rgba(177,218,185,0.7); line-height: 1.5; }
.source-signal .source-label .heading { color: var(--signal); display: block; margin-bottom: 4px; }
.source-signal .signal-id { font-family: var(--f-mono); font-size: 13px; line-height: 1.85; color: rgba(255,255,255,0.9); }
.source-signal .signal-id .key { color: rgba(177,218,185,0.55); }
.source-signal .signal-id .accent { color: var(--signal); }
.source-signal .signal-summary { font-family: var(--f-mono); font-size: 10px; line-height: 1.7; color: rgba(177,218,185,0.6); letter-spacing: 0.04em; }

section.consumer { padding: var(--s9) var(--gutter) var(--s8); position: relative; border-bottom: 1px solid var(--line-soft); }
section.consumer:nth-child(even) { background: var(--paper-warm); }

.interpretation-panel { margin-top: var(--s7); padding: var(--s5) 0 0; min-height: auto; display: flex; flex-direction: column; }
.interpretation-panel .panel-header { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: var(--s2) var(--s4); margin-bottom: var(--s4); padding-bottom: var(--s3); border-bottom: 1px solid var(--line); }
.interpretation-panel .panel-title { font-family: var(--f-display); font-size: 26px; line-height: 1.16; letter-spacing: -0.016em; color: var(--ink); }
.interpretation-panel .panel-meta { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-muted); text-align: right; line-height: 1.6; }
.interpretation-panel svg { width: 100%; height: auto; min-height: 360px; max-height: 460px; display: block; }

.consumer-ops { margin-top: var(--s6); display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0; border-top: 1px solid var(--ink); }
.consumer-ops .op { padding: var(--s4) var(--s4) var(--s4) 0; border-right: 1px solid var(--line); }
.consumer-ops .op:last-child { border-right: none; padding-right: 0; }
.consumer-ops .op-label { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--s2); }
.consumer-ops .op-body { font-family: var(--f-body); font-size: 14.5px; line-height: 1.6; color: var(--ink); }

.brief-endpoint { margin-top: var(--s5); padding: var(--s3) var(--s4); background: var(--black); border-left: 2px solid var(--signal); font-family: var(--f-mono); font-size: 12.5px; line-height: 1.9; color: rgba(177,218,185,0.72); }
.brief-endpoint .verb { color: var(--signal); }
.brief-endpoint .path { color: rgba(255,255,255,0.85); }
.brief-endpoint .cmt { color: rgba(177,218,185,0.4); font-style: italic; }

.closing-transition { margin-top: var(--s6); padding-top: var(--s3); border-top: 1px solid var(--line); font-family: var(--f-display); font-size: 17px; line-height: 1.6; color: var(--ink-muted); font-style: italic; max-width: 60ch; }

.secondary-block { padding: var(--s8) var(--gutter); background: var(--paper-deep); border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line-soft); position: relative; z-index: 2; }
.secondary-block .inner { max-width: var(--content-max); margin: 0 auto; }
.secondary-block .secondary-label { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--s6); padding-bottom: var(--s2); border-bottom: 1px solid var(--line); }
.secondary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s7); }
.secondary-item .marker { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--s3); }
.secondary-item .marker .num { color: var(--ink); }
.secondary-item h3 { font-family: var(--f-display); font-size: clamp(26px, 3vw, 34px); line-height: 1.1; letter-spacing: -0.02em; color: var(--ink); font-weight: 400; margin-bottom: var(--s4); }
.secondary-item .body { font-family: var(--f-body); font-size: 14.5px; line-height: 1.66; color: var(--ink-mid); margin-bottom: var(--s3); }
.secondary-item .body p + p { margin-top: var(--s2); }
.secondary-item .examples { font-family: var(--f-mono); font-size: 10px; line-height: 1.9; letter-spacing: 0.06em; color: var(--ink-muted); padding: var(--s2) var(--s3); border-left: 2px solid var(--signal-deep); background: rgba(177,218,185,0.12); }
.secondary-item .examples .k { color: var(--signal-deep); text-transform: uppercase; letter-spacing: 0.14em; }
.secondary-item .brief-tag { display: inline-block; font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.08em; color: var(--signal-deep); padding: 4px 10px; border: 1px solid rgba(14,62,21,0.3); margin-top: var(--s2); }

.proof-summary { padding: var(--s9) var(--gutter); background: var(--black); color: var(--paper); border-top: 2px solid var(--signal-deep); position: relative; z-index: 2; }
.proof-summary .inner { max-width: var(--content-max); margin: 0 auto; }
.proof-summary .eyebrow { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--signal); margin-bottom: var(--s5); }
.proof-summary h2 { font-family: var(--f-display); font-size: clamp(34px, 4.6vw, 62px); line-height: 1.06; letter-spacing: -0.026em; color: var(--paper); font-weight: 400; max-width: 18ch; margin-bottom: var(--s6); text-wrap: balance; }
.proof-summary .signal-restate { font-family: var(--f-mono); font-size: 12.5px; line-height: 1.85; color: rgba(255,255,255,0.66); margin-bottom: var(--s3); }
.proof-summary .signal-restate .key { color: rgba(177,218,185,0.5); }
.proof-summary .signal-restate .signal { color: var(--signal); }
.proof-annotation { margin: var(--s6) 0; padding: var(--s4) 0; border-top: 1px solid var(--line-on-dark); border-bottom: 1px solid var(--line-on-dark); display: flex; flex-direction: column; gap: 8px; }
.proof-annotation .line { font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--signal); line-height: 1.4; }
.proof-annotation .line:first-child { color: rgba(177,218,185,0.55); }
.proof-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-on-dark); border: 1px solid var(--line-on-dark); margin-top: var(--s5); }
.proof-grid .cell { background: var(--black); padding: var(--s4); }
.proof-grid .cell .label { font-family: var(--f-mono); font-size: 9px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--signal); margin-bottom: var(--s2); }
.proof-grid .cell .name { font-family: var(--f-display); font-size: 20px; line-height: 1.18; color: var(--paper); margin-bottom: 8px; }
.proof-grid .cell .interp { font-family: var(--f-body); font-size: 12.5px; line-height: 1.55; color: rgba(255,255,255,0.66); }

.moat-frame { margin-top: var(--s8); }
.moat-frame.plane-dark { margin-left: calc(-1 * var(--gutter)); margin-right: calc(-1 * var(--gutter)); padding: var(--s8) var(--gutter); background: var(--black); color: var(--paper); }
.moat-frame.plane-dark > .label { color: var(--signal); text-align: center; display: block; margin-bottom: var(--s5); border: none; }
.moat-frame .label { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-muted); text-align: center; display: block; margin-bottom: var(--s4); }
.moat-frame svg { display: block; margin: 0 auto; width: 100%; max-width: 560px; height: auto; }

.requirements { margin-top: var(--s8); }
.requirements .header { margin-bottom: var(--s6); }
.requirements .header h3 { font-family: var(--f-display); font-size: clamp(24px, 2.8vw, 34px); letter-spacing: -0.018em; color: var(--ink); font-weight: 400; }
.requirement { display: grid; grid-template-columns: 80px 1fr; gap: var(--s5); padding: var(--s5) 0; border-top: 1px solid var(--line); }
.requirement:first-of-type { border-top: 2px solid var(--ink); }
.requirement .r-num { font-family: var(--f-display); font-size: 38px; letter-spacing: -0.02em; color: var(--signal-deep); line-height: 0.9; }
.requirement .r-content .r-name { font-family: var(--f-display); font-size: 23px; letter-spacing: -0.014em; color: var(--ink); margin-bottom: var(--s2); }
.requirement .r-content .r-desc { font-family: var(--f-body); font-size: 15px; line-height: 1.62; color: var(--ink-mid); max-width: 70ch; }

.moat-convergence { margin-top: var(--s7); padding: var(--s7) var(--gutter); margin-left: calc(-1 * var(--gutter)); margin-right: calc(-1 * var(--gutter)); background: var(--black-deep); color: var(--paper); }
.moat-convergence > * { max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.moat-convergence .label { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--signal); margin-bottom: var(--s4); }

.bridge { padding: var(--s9) var(--gutter); background: var(--paper); border-bottom: 1px solid var(--line-soft); border-top: 1px solid var(--line-soft); position: relative; z-index: 2; }
.bridge .bridge-inner { max-width: 900px; margin: 0 auto; }
.bridge .bridge-text { font-family: var(--f-display); font-size: clamp(22px, 2.8vw, 36px); line-height: 1.34; letter-spacing: -0.018em; color: var(--ink-soft); font-style: italic; font-weight: 400; text-wrap: pretty; }

.rev-stack-frame { margin-top: var(--s7); border-top: 2px solid var(--ink); }
.rev-stack-frame .stack-label { display: flex; justify-content: space-between; align-items: baseline; padding: var(--s3) 0; flex-wrap: wrap; gap: var(--s2); }
.rev-stack-frame .stack-label .title { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-muted); }
.rev-stack-frame .stack-label .direction { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--signal-deep); }
.rev-row { display: grid; grid-template-columns: 72px 1fr 1.5fr; gap: var(--s4); padding: var(--s4) 0 var(--s5); border-top: 1px solid var(--line); align-items: baseline; position: relative; }
.rev-row .rev-num { font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.08em; color: var(--ink-muted); }
.rev-row .rev-num .n { font-family: var(--f-display); font-size: 26px; letter-spacing: -0.01em; color: var(--signal-deep); }
.rev-row .rev-name { font-family: var(--f-display); font-size: 21px; letter-spacing: -0.012em; color: var(--ink); }
.rev-row .rev-model { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.03em; color: var(--ink-muted); line-height: 1.7; }
.rev-row .rev-bar { position: absolute; left: 0; bottom: 0; height: 2px; background: var(--signal-deep); opacity: 0.55; transition: width 0.6s cubic-bezier(0.2,0.7,0.2,1); }

#s16 { padding: var(--s10) var(--gutter); min-height: 88vh; display: flex; align-items: center; }
#s16 .closing { max-width: 980px; }
#s16 .closing .eyebrow { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--s6); }
#s16 .closing .statement { font-family: var(--f-display); font-size: clamp(30px, 4.4vw, 60px); line-height: 1.16; letter-spacing: -0.028em; color: var(--ink); font-weight: 400; }
#s16 .closing .statement .dim { color: var(--ink-light); display: block; }
#s16 .closing .statement .hold { color: var(--ink); display: block; margin-top: var(--s4); }

#appendix-a { background: var(--black); color: var(--paper); border-bottom: none; }
#appendix-a .section-marker, #appendix-a .section-marker .num { color: var(--signal); }
#appendix-a .t-h1 { color: var(--paper); }
#appendix-a .t-lead { color: rgba(255,255,255,0.78); }
#appendix-a .t-label { color: rgba(177,218,185,0.6); }
.appendix-grid { margin-top: var(--s7); display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line-on-dark); border: 1px solid var(--line-on-dark); }
.appendix-cell { background: var(--black); padding: var(--s5); }
.appendix-cell .ac-label { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--signal); margin-bottom: var(--s2); }
.appendix-cell .ac-name { font-family: var(--f-display); font-size: 22px; color: var(--paper); margin-bottom: var(--s2); letter-spacing: -0.012em; }
.appendix-cell .ac-desc { font-family: var(--f-body); font-size: 13px; line-height: 1.55; color: rgba(255,255,255,0.66); margin-bottom: var(--s3); }
.appendix-cell .ac-states { font-family: var(--f-mono); font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(177,218,185,0.6); line-height: 1.9; }
.appendix-cell .visual { margin-top: var(--s3); padding: var(--s3); border: 1px solid var(--line-on-dark); }
.appendix-cell .visual svg { width: 100%; height: auto; display: block; }
.appendix-rules { margin-top: var(--s7); display: grid; grid-template-columns: 1fr 1fr; gap: var(--s6); }
.appendix-rules .col h4 { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--signal); margin-bottom: var(--s3); padding-bottom: var(--s1); border-bottom: 1px solid var(--line-on-dark); font-weight: 400; }
.appendix-rules .col ul { list-style: none; }
.appendix-rules .col li { font-family: var(--f-body); font-size: 13px; line-height: 1.5; color: rgba(255,255,255,0.74); padding: var(--s2) 0; border-bottom: 1px solid rgba(177,218,185,0.08); display: flex; gap: 10px; }
.appendix-rules .col.allowed li::before { content: "✓"; color: var(--signal); }
.appendix-rules .col.forbidden li::before { content: "✕"; color: var(--risk-high); }

.doc-colophon { padding: var(--s8) var(--gutter); background: var(--black-deep); border-top: 1px solid var(--line-on-dark); position: relative; z-index: 2; }
.doc-colophon .inner { max-width: var(--content-max); margin: 0 auto; }
.doc-colophon .identity { font-family: var(--f-display); font-size: clamp(20px, 2.4vw, 30px); line-height: 1.34; letter-spacing: -0.014em; color: var(--paper); max-width: 32ch; margin-bottom: var(--s6); }
.doc-colophon .meta-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s4); padding-top: var(--s5); border-top: 1px solid var(--line-on-dark); }
.doc-colophon .meta-grid .m { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(177,218,185,0.6); line-height: 1.9; }
.doc-colophon .meta-grid .m .v { color: rgba(255,255,255,0.85); display: block; }

.overture {
  position: relative; z-index: 2;
  background: var(--black); color: var(--paper);
  padding: var(--s10) var(--gutter);
  min-height: 78vh; display: flex; align-items: center;
  overflow: hidden;
  border-top: 1px solid var(--signal-deep);
}
.overture::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(177,218,185,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(177,218,185,0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 80% 90% at 70% 50%, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse 80% 90% at 70% 50%, #000 30%, transparent 78%);
}
.overture .ov-inner { max-width: var(--content-max); margin: 0 auto; width: 100%; position: relative; z-index: 1; }
.overture .ov-index { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--signal); margin-bottom: var(--s5); display: flex; align-items: center; gap: 14px; }
.overture .ov-index::after { content: ""; flex: 1; max-width: 120px; height: 1px; background: var(--line-on-dark); }
.overture .ov-title { font-family: var(--f-display); font-size: clamp(48px, 8.5vw, 132px); line-height: 0.92; letter-spacing: -0.04em; color: var(--paper); font-weight: 400; max-width: 16ch; text-wrap: balance; }
.overture .ov-title em { font-style: italic; color: var(--signal); }
.overture .ov-sub { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: rgba(177,218,185,0.6); margin-top: var(--s6); line-height: 1.9; max-width: 70ch; }
.overture .ov-tele { margin-top: var(--s5); display: flex; flex-wrap: wrap; gap: var(--s5); padding-top: var(--s4); border-top: 1px solid var(--line-on-dark); }
.overture .ov-tele .t { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(177,218,185,0.55); }
.overture .ov-tele .t b { display: block; font-size: 19px; letter-spacing: 0.02em; color: var(--signal); font-weight: 400; margin-top: 6px; }
.overture + section { padding-top: var(--s8); }

.tele-rail {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  display: flex; align-items: center; gap: var(--s4);
  padding: 10px var(--gutter); overflow: hidden;
  background: rgba(6,11,7,0.94); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--line-on-dark);
  font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  white-space: nowrap;
}
.tele-rail .tr-status { color: var(--signal); display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.tele-rail .tr-status::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 0 rgba(177,218,185,0.5); animation: live-pulse 3.2s ease-out infinite; }
.tele-rail .tr-items { display: flex; gap: var(--s4); flex: 1 1 auto; overflow: hidden; color: rgba(177,218,185,0.5); }
.tele-rail .tr-items .ti { display: inline-flex; gap: 7px; align-items: baseline; }
.tele-rail .tr-items .ti .v { color: rgba(255,255,255,0.86); }
.tele-rail .tr-clock { color: rgba(177,218,185,0.7); flex: 0 0 auto; }

main { padding-bottom: 40px; }

body.presenter .colophon { background: var(--black); border-bottom-color: var(--line-on-dark); }
body.presenter .colophon .brand, body.presenter .colophon .doc-meta { color: var(--signal); }
body.presenter main > section, body.presenter main > .gate-preamble, body.presenter main > .bridge,
body.presenter main > .secondary-block, body.presenter main > .proof-summary,
body.presenter main > .doc-colophon, body.presenter main > .overture {
  min-height: 100vh; display: flex; flex-direction: column; justify-content: center; scroll-snap-align: start;
}
body.presenter main { scroll-snap-type: y mandatory; height: 100vh; overflow-y: scroll; }
.presenter-hint { display: none; position: fixed; bottom: 48px; right: var(--gutter); font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-muted); z-index: 200; }
body.presenter .presenter-hint { display: block; }

@media (max-width: 1080px) {
  :root { --gutter: 56px; --spine: 28px; }
  .arch-layer { grid-template-columns: 64px 1fr; gap: var(--s2) var(--s3); }
  .arch-layer .layer-fn, .arch-layer .layer-tech { grid-column: 2; }
  .primitive-card { grid-template-columns: 1fr; gap: var(--s3); }
  .primitive-card .p-content { grid-template-columns: 1fr; gap: var(--s3); }
  .fetch-grid { grid-template-columns: 1fr; gap: var(--s5); }
  .derived-grid { grid-template-columns: 1fr; }
  .derived-item.featured { grid-column: span 1; }
  .source-signal { grid-template-columns: 1fr; gap: var(--s2); }
  .consumer-ops, .secondary-grid, .proof-grid, .appendix-grid, .appendix-rules { grid-template-columns: 1fr; }
  .interpretation-panel .panel-header { grid-template-columns: 1fr; }
  .interpretation-panel .panel-meta { text-align: left; }
  .consumer-ops .op { border-right: none; border-bottom: 1px solid var(--line); padding: var(--s3) 0; }
  .consumer-ops .op:last-child { border-bottom: none; }
  .proof-grid .cell { border-bottom: 1px solid var(--line-on-dark); }
  .rev-row { grid-template-columns: 56px 1fr; }
  .rev-row .rev-model { grid-column: 1 / -1; }
  .doc-colophon .meta-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  :root { --gutter: 22px; --spine: 12px; --content-max: 100%; }
  section, .consumer { padding: var(--s8) var(--gutter) var(--s7); }
  .overture { min-height: 70vh; padding: var(--s8) var(--gutter); }
  .colophon { padding: var(--s2) var(--gutter); }
  .colophon .doc-meta { font-size: 9px; }
  .engine-step { grid-template-columns: 56px 1fr; gap: var(--s3); }
  .requirement { grid-template-columns: 52px 1fr; gap: var(--s3); }
  .tele-rail .tr-items { display: none; }
  body.presenter main { scroll-snap-type: none; height: auto; }
  body.presenter main > * { min-height: auto; }
}

/* ── V6 · Utility bar (PDF + Fetch API) ───────────────────────── */
.colophon .util-bar { display: inline-flex; align-items: center; gap: 18px; }
.colophon .util-link {
  font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink); text-decoration: none;
  padding: 4px 10px; border: 1px solid rgba(14,62,21,0.18); border-radius: 999px;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.colophon .util-link:hover { background: var(--ink); color: #F5F4EF; border-color: var(--ink); }

/* ── V6 · Shared diagram tokens ──────────────────────────────── */
:root {
  --dg-companion: #0E3E15;
  --dg-signal:    #81DA89;
  --dg-telemetry: #B5CFD5;
  --dg-fetch:     #4B0D44;
  --dg-ink:       #0B1F12;
  --dg-paper:     #F5F4EF;
  --dg-hairline:  rgba(14,62,21,0.18);
  --dg-connector: rgba(14,62,21,0.38);
  --dg-shadow:    drop-shadow(0 1px 1px rgba(14,62,21,0.06)) drop-shadow(0 6px 14px rgba(14,62,21,0.05));
}
.dg-canvas {
  background:
    radial-gradient(circle at 1px 1px, rgba(14,62,21,0.085) 1px, transparent 1.4px) 0 0 / 22px 22px,
    var(--dg-paper);
  border: 1px solid var(--dg-hairline);
  border-radius: 14px;
  padding: 28px 22px 22px;
  margin-top: var(--s3);
}
.dg-canvas svg { display: block; width: 100%; height: auto; filter: var(--dg-shadow); }
.dg-canvas svg text { font-family: "Suisse Intl", system-ui, sans-serif; fill: var(--dg-ink); }
.dg-canvas svg .dg-mono { font-family: "Suisse Intl Mono", ui-monospace, monospace; letter-spacing: 0.14em; text-transform: uppercase; }
.dg-canvas svg .dg-eyebrow { font-size: 9px; fill: #4A6A4E; }
.dg-canvas svg .dg-cap     { font-size: 10px; fill: #4A6A4E; }
.dg-canvas svg .dg-label   { font-size: 12px; font-weight: 500; }
.dg-canvas svg .dg-display { font-family: "Faire Octave", Georgia, serif; }
.dg-canvas svg .dg-card    { fill: #FFFFFF; stroke: var(--dg-hairline); stroke-width: 1; }
.dg-canvas svg .dg-card-soft { fill: rgba(255,255,255,0.66); stroke: var(--dg-hairline); stroke-width: 1; }
.dg-canvas svg .dg-card-signal { fill: rgba(129,218,137,0.18); stroke: rgba(14,62,21,0.22); stroke-width: 1; }
.dg-canvas svg .dg-card-telemetry { fill: rgba(181,207,213,0.32); stroke: rgba(11,71,86,0.22); stroke-width: 1; }
.dg-canvas svg .dg-connector { fill: none; stroke: var(--dg-connector); stroke-width: 1.25; }
.dg-canvas svg .dg-connector-dot { fill: var(--dg-companion); }
.dg-canvas svg .dg-fetch-cap { fill: var(--dg-fetch); }
.dg-canvas svg .dg-fetch-text { fill: #FFFFFF; font-family: "Suisse Intl Mono", monospace; font-size: 9px; letter-spacing: 0.22em; text-transform: uppercase; }
.dg-canvas .dg-cap-line { font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: #4A6A4E; margin-top: var(--s3); }

/* ── V7 · Reference-match primitives ──────────────────────────── */
.dg-canvas svg .dg-panel       { fill: rgba(255,255,255,0.55); stroke: var(--dg-hairline); stroke-width: 1; }
.dg-canvas svg .dg-panel-bg    { fill: rgba(129,218,137,0.06); stroke: rgba(14,62,21,0.22); stroke-width: 1; }
.dg-canvas svg .dg-chip        { fill: #FFFFFF; stroke: var(--dg-hairline); stroke-width: 1; }
.dg-canvas svg .dg-icon-tile   { fill: rgba(129,218,137,0.22); stroke: rgba(14,62,21,0.18); stroke-width: 1; }
.dg-canvas svg .dg-icon-tile-plum { fill: rgba(75,13,68,0.10); stroke: rgba(75,13,68,0.22); stroke-width: 1; }
.dg-canvas svg .dg-icon        { fill: none; stroke: var(--dg-companion); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.dg-canvas svg .dg-icon-plum   { fill: none; stroke: var(--dg-fetch); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.dg-canvas svg .dg-divider     { stroke: rgba(14,62,21,0.12); stroke-width: 1; stroke-dasharray: 2 4; }
.dg-canvas svg .dg-moat-card   { stroke: var(--dg-companion); stroke-width: 1; }
.dg-canvas svg .dg-connector-plum     { fill: none; stroke: rgba(75,13,68,0.55); stroke-width: 1.25; }
.dg-canvas svg .dg-connector-telemetry { fill: none; stroke: rgba(11,71,86,0.45); stroke-width: 1.1; }
.dg-canvas svg .dg-connector-dot-plum { fill: var(--dg-fetch); }

/* Fig 09.01 · v8 reference-match canvas */
.dg-canvas--09 {
  background:
    radial-gradient(circle at 1px 1px, rgba(11,71,86,0.10) 1px, transparent 1.4px) 0 0 / 26px 26px,
    #F5F4EF;
  padding: 18px 20px;
  border-radius: 18px;
  border: 1px solid rgba(11,71,86,0.10);
}
.dg-canvas--09 svg { filter: none; }







@media print {
  .ambient, .spine, .colophon, .presenter-hint, .tele-rail { display: none !important; }
  body { background: white; color: black; font-size: 11pt; }
  main { padding: 0; }
  section, .gate-preamble, .secondary-block, .proof-summary, .bridge, .doc-colophon, .overture {
    padding: 14mm 16mm; page-break-inside: avoid; border-bottom: none; min-height: auto !important; display: block !important;
  }
  .overture { background: #060B07 !important; }
  .derived-block, .fetch-formal-block, .fetch-canonical, .replay-frame, .architecture-frame,
  .anatomy-frame.plane-dark, .moat-frame.plane-dark, .moat-convergence, .interpretation-cross,
  .proof-summary, .proof-grid .cell, #appendix-a, .doc-colophon, .overture, .source-signal, .brief-endpoint,
  .dg-canvas {
    -webkit-print-color-adjust: exact; print-color-adjust: exact;
  }
  .util-bar { display: none !important; }
  svg { max-width: 100%; page-break-inside: avoid; }
  .t-h1, .t-h2 { page-break-after: avoid; }
}