/* frontier-safety-edition.css: the Frontier Safety Briefing on the void-and-bone surface.

   The live briefing and every archive after 2026-09-23 load this sheet after
   frontier-safety-site.css (tools/build_frontier_safety_briefing.py writes the link).
   The frozen archives up to 2026-09-23 never load it, so they keep the shell they
   shipped with. system/tokens.css and system/plate.css own the grounds, the
   registration field, the grain veil and the crop marks; this sheet lays the
   briefing out on them:

   - a poster title, one sentence per line, on a hairline;
   - the edition as a dated plate: a framed block with corner ticks and the date
     at display weight;
   - the briefing cover as the page's one art plate, across the full measure;
   - numbered hairline sections, each opening on a registration cross;
   - records with the claim at the left and its limits and sources beside it;
   - status drawn as shapes, and the one filled mark reserved for what changed;
   - every line of text on the flat ground, with the field in the gutters.

   Two faces (Hanken Grotesk for every text role, Conso only for the digest). Color
   is ink on the ground; the tokens switch it for dark, forced colors and print.
   Every selector carries body.frontier-briefing:not(#_), one ID step above the
   older reading, system and plate cascades, and !important appears only where
   reading.css or print.css already set the same property with it. */

body.frontier-briefing:not(#_){
  --fsb-shell:max(clamp(1.25rem,5vw,5.5rem),calc((100% - 80rem) / 2));
  --fsb-title:var(--t-poster);
  --fsb-head:clamp(1.75rem,1.05rem + 3.3vw,4.25rem);
  --fsb-dek:clamp(1.0625rem,1rem + .3vw,1.25rem);
}

/* 1. Text sits on a calm ground. The hero and main paint the flat page ground in a
   centered column 1.5rem wider than the text on each side, so the registration field and
   grain veil from plate.css show in the side gutters and the gaps between plates, as they
   do beside the essays, and never under or against a line of text. On a phone the whole
   width is calm. */
body.frontier-briefing:not(#_) :is(.frame.briefing-hero,main#main){
  background:linear-gradient(var(--paper),var(--paper)) center/calc(100% - 2*max(0px,var(--fsb-shell) - 1.5rem)) 100% no-repeat;
  background-color:transparent;box-shadow:none;border:0;border-image:none;
}
@media (max-width:40rem){body.frontier-briefing:not(#_) :is(.frame.briefing-hero,main#main){background:var(--paper)}}
/* The hero's own blocks carry the flat ground too, so every line of hero text has an opaque
   ground under it whatever the column width. */
body.frontier-briefing:not(#_) .frame.briefing-hero > :not(.art){background-color:var(--paper)}
body.frontier-briefing:not(#_) main > section.mv{background:var(--paper);box-shadow:none;border:0;border-image:none}
body.frontier-briefing:not(#_) .footer-seal{background:var(--paper);box-shadow:none;border:0;border-image:none}

/* 2. The hero: a poster title across the measure, the summary beside the dated
   plate, and the cover plate under both. */
body.frontier-briefing:not(#_) .frame.briefing-hero{
  display:block;width:auto;max-width:none;min-height:0;margin:0;
  padding:clamp(1.25rem,3vw,2.5rem) var(--fsb-shell) 0;
  pointer-events:auto;
}
/* Named areas keep the markup order (title, dated plate, summary, cover) for reading
   and place the plate beside the summary on wide screens. The path row stays empty
   until nav.js mounts the breadcrumb. */
body.frontier-briefing:not(#_) .briefing-intro{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(17rem,24rem);
  grid-template-areas:"path path" "title title" "lede plate" "cover cover";
  column-gap:clamp(2rem,6vw,6rem);align-items:start;
  max-width:none;margin:0;padding:0;
}
body.frontier-briefing:not(#_) .briefing-intro > *{grid-column:1 / -1;min-width:0}
body.frontier-briefing:not(#_) .briefing-intro > .route-header__path{grid-area:path}
body.frontier-briefing:not(#_) .briefing-intro > h1{grid-area:title}
body.frontier-briefing:not(#_) .briefing-intro > .lede{grid-area:lede}
body.frontier-briefing:not(#_) .briefing-intro > .edition-plate{grid-area:plate}
body.frontier-briefing:not(#_) .briefing-intro > .briefing-cover{grid-area:cover}

body.frontier-briefing:not(#_) .briefing-intro h1{
  max-width:none;margin:0 0 clamp(1.75rem,3.5vw,2.75rem);
  padding:0 0 clamp(1.25rem,2.5vw,2rem);border-bottom:1px solid var(--line-strong);
  font-family:var(--font-sans);font-size:var(--fsb-title);font-weight:800;
  letter-spacing:-.045em;line-height:.9;color:var(--ink);text-shadow:none;text-wrap:balance;
}
body.frontier-briefing:not(#_) .briefing-intro h1 .title-line{display:block}
/* The open clause steps back one tone: ink family, never a hue. */
body.frontier-briefing:not(#_) .briefing-intro h1 .g{color:var(--soft)}

body.frontier-briefing:not(#_) .briefing-intro > .lede{
  max-width:62ch;margin:0;opacity:1;
  font-family:var(--font-sans);font-size:var(--fsb-dek);line-height:1.62;color:var(--ink);
}

/* 2b. The dated plate: a thin frame with corner ticks, like a mounted print. */
body.frontier-briefing:not(#_) .edition-plate{
  position:relative;margin:0;padding:clamp(1.1rem,2vw,1.5rem) clamp(1.1rem,2vw,1.5rem) .9rem;
  border:1px solid var(--line);background:var(--paper);
}
body.frontier-briefing:not(#_) .edition-plate::after{
  content:"";position:absolute;inset:-5px;pointer-events:none;--k:12px;
  background:
    linear-gradient(var(--line-strong),var(--line-strong)) top left/var(--k) 1px no-repeat,
    linear-gradient(var(--line-strong),var(--line-strong)) top left/1px var(--k) no-repeat,
    linear-gradient(var(--line-strong),var(--line-strong)) bottom right/var(--k) 1px no-repeat,
    linear-gradient(var(--line-strong),var(--line-strong)) bottom right/1px var(--k) no-repeat;
}
body.frontier-briefing:not(#_) .edition-readout{display:block;max-width:none;margin:0;padding:0;border:0}
body.frontier-briefing:not(#_) .edition-readout > div,
body.frontier-briefing:not(#_) .edition-readout > div:not(:first-child){
  display:grid;grid-template-columns:minmax(0,8.25rem) minmax(0,1fr);
  gap:.2rem 1rem;align-items:baseline;padding:.7rem 0;border:0;border-top:1px solid var(--line);
}
body.frontier-briefing:not(#_) .edition-readout > div:first-child{display:block;padding:0 0 1.1rem;border:0}
body.frontier-briefing:not(#_) .edition-readout dt{
  margin:0;font-family:var(--font-sans);font-size:.9375rem!important;font-weight:500;
  line-height:1.4;letter-spacing:0;text-transform:none;color:var(--soft);
}
body.frontier-briefing:not(#_) .edition-readout dd{
  margin:0;font-family:var(--font-sans);font-size:1rem!important;font-weight:600;
  line-height:1.45;letter-spacing:0;color:var(--ink);overflow-wrap:anywhere;
}
body.frontier-briefing:not(#_) .edition-readout > div:first-child dd{
  margin-top:.4rem;font-size:clamp(2rem,1.35rem + 2.4vw,3.5rem)!important;font-weight:800;
  letter-spacing:-.045em;line-height:.92;font-variant-numeric:tabular-nums lining-nums;
}
body.frontier-briefing:not(#_) .edition-check{margin:0;padding:.55rem 0 0;border-top:1px solid var(--line)}
body.frontier-briefing:not(#_) .edition-check summary{
  display:inline-flex;align-items:center;gap:.65rem;min-height:44px;list-style:none;
  padding:.35rem 0;cursor:pointer;font-family:var(--font-sans);font-size:.9375rem;
  font-weight:600;line-height:1.5;color:var(--ink);
}
/* The drawn plus the other disclosures use, in place of the browser's filled triangle. */
body.frontier-briefing:not(#_) .edition-check summary::-webkit-details-marker{display:none}
body.frontier-briefing:not(#_) .edition-check summary::before{
  content:"";flex:none;width:.85rem;height:.85rem;
  background:linear-gradient(currentColor,currentColor) center/100% 2px no-repeat,linear-gradient(currentColor,currentColor) center/2px 100% no-repeat;
}
body.frontier-briefing:not(#_) .edition-check[open] summary::before{background:linear-gradient(currentColor,currentColor) center/100% 2px no-repeat}
body.frontier-briefing:not(#_) .edition-check p{margin:.35rem 0 .3rem;font-size:.9375rem;line-height:1.55;color:var(--soft)}
body.frontier-briefing:not(#_) .edition-check code{
  display:block;margin-top:.35rem;font-family:var(--font-mono);font-size:.9375rem;
  line-height:1.5;color:var(--ink);overflow-wrap:anywhere;word-break:break-all;
}

/* 2c. The cover plate: the page's one luminous object, across the measure. The
   frame and corner ticks come from plate.css; overflow stays visible so the ticks
   outside the frame are not clipped. */
body.frontier-briefing:not(#_) .briefing-intro > .briefing-cover{
  margin:clamp(2.5rem,5vw,4rem) 0 0;max-inline-size:none;aspect-ratio:auto;
  overflow:visible;border-radius:0;
}
body.frontier-briefing:not(#_) .briefing-cover img{inline-size:100%;block-size:auto;aspect-ratio:2 / 1}

/* 3. Numbered hairline sections. Each opens on a strong hairline with a
   registration cross at its left end; the numeral takes the left column and the
   heading stands at poster weight beside it. */
body.frontier-briefing:not(#_) main#main{display:block;padding:0 var(--fsb-shell);counter-reset:fsb-plate}
body.frontier-briefing:not(#_) main > section.mv{
  counter-increment:fsb-plate;position:relative;display:grid;
  grid-template-columns:clamp(3rem,7vw,6rem) minmax(0,1fr);column-gap:1rem;align-items:start;
  min-height:0;max-width:none;margin:clamp(4rem,9vw,7.5rem) 0 0;padding:1.25rem 0 0;
  border-top:1px solid var(--line-strong);
}
body.frontier-briefing:not(#_) main > section.mv::before{
  content:counter(fsb-plate,decimal-leading-zero);
  content:counter(fsb-plate,decimal-leading-zero) / "";
  grid-column:1;grid-row:1;padding-top:.55rem;
  font-family:var(--font-sans);font-size:1rem;font-weight:650;line-height:1;
  letter-spacing:.02em;font-variant-numeric:tabular-nums;color:var(--soft);
}
body.frontier-briefing:not(#_) main > section.mv::after{
  content:"";position:absolute;top:-8px;left:-7px;width:15px;height:15px;pointer-events:none;
  background:
    linear-gradient(var(--ink),var(--ink)) center/1px 100% no-repeat,
    linear-gradient(var(--ink),var(--ink)) center/100% 1px no-repeat;
}
body.frontier-briefing:not(#_) main > section.mv > *{grid-column:2;min-width:0}
body.frontier-briefing:not(#_) main > section.mv :is(.lane-head,.wide-section > header,header){max-width:none;margin:0}
body.frontier-briefing:not(#_) main h2{
  max-width:22ch;margin:0;padding:0;background:none;
  font-family:var(--font-sans);font-size:var(--fsb-head);font-weight:780;
  letter-spacing:-.04em;line-height:.96;color:var(--ink);text-shadow:none;text-wrap:balance;
}
body.frontier-briefing:not(#_) main h2::before,
body.frontier-briefing:not(#_) main h2::after{content:none;display:none}

/* 3b. Conclusions: what the record lets a reader conclude, grouped by strength in
   words. Each conclusion reads as one bold sentence under its strength word; its
   support (the observed, inferred and unknown paragraphs, what would change it and
   the evidence links) waits in a closed disclosure, the way the Who Knew First
   findings read. Strength is a word and a heading, never a color, so no group reads
   as a verdict mark. */
body.frontier-briefing:not(#_) .conclusions :is(.conclusions-dek,.conclusions-note){
  max-width:62ch;margin:1.1rem 0 0;font-family:var(--font-sans);font-size:var(--fsb-dek);line-height:1.55;color:var(--soft);
}
body.frontier-briefing:not(#_) .conclusions .conclusions-note{font-size:1rem;line-height:1.6}
body.frontier-briefing:not(#_) .conclusions .conclusions-key{max-width:62ch;margin:1.25rem 0 0;padding:0}
body.frontier-briefing:not(#_) .conclusions .conclusions-key > div{padding:.55rem 0;border-top:1px solid var(--line)}
body.frontier-briefing:not(#_) .conclusions .conclusions-key > div:last-child{border-bottom:1px solid var(--line)}
body.frontier-briefing:not(#_) .conclusions .conclusions-key :is(dt,dd){display:inline;margin:0;font-family:var(--font-sans);font-size:1rem;line-height:1.55}
body.frontier-briefing:not(#_) .conclusions .conclusions-key dt{font-weight:700;color:var(--ink)}
body.frontier-briefing:not(#_) .conclusions .conclusions-key dt::after{content:":"}
body.frontier-briefing:not(#_) .conclusions .conclusions-key dd{color:var(--soft)}
body.frontier-briefing:not(#_) .conclusions :is(.conclusion-group,.conclusions-across){margin:clamp(2.5rem,5vw,3.75rem) 0 0}
body.frontier-briefing:not(#_) .conclusions :is(.conclusion-group h3,.conclusions-across > h3,.conclusion-group h4){
  margin:0 0 1.1rem;font-family:var(--font-sans);font-size:clamp(1.3rem,1.1rem + .7vw,1.75rem);
  font-weight:740;letter-spacing:-.02em;line-height:1.15;color:var(--ink);
}
body.frontier-briefing:not(#_) .conclusions .conclusion-group h4{font-size:clamp(1.15rem,1.05rem + .4vw,1.375rem)}
body.frontier-briefing:not(#_) .conclusions .conclusion{padding:clamp(1.25rem,2.5vw,1.75rem) 0 0;border-top:1px solid var(--line)}
body.frontier-briefing:not(#_) .conclusion-lead{max-width:62ch;margin:0;font-size:1.1875rem;line-height:1.5;color:var(--ink);text-wrap:pretty}
body.frontier-briefing:not(#_) .conclusion-lead strong{font-weight:650}
body.frontier-briefing:not(#_) .conclusion-strength{
  display:block;margin:0 0 .4rem;font-family:var(--font-sans);font-size:.9375rem;font-weight:600;
  line-height:1.4;letter-spacing:.01em;color:var(--soft);
}
body.frontier-briefing:not(#_) details.conclusion-more{margin:1rem 0 clamp(1.25rem,2.5vw,1.75rem);max-width:none}
body.frontier-briefing:not(#_) details.conclusion-more > summary{
  display:inline-flex;align-items:center;gap:.65rem;min-height:44px;padding-block:.35rem;cursor:pointer;list-style:none;
  font-family:var(--font-sans);font-size:1rem;font-weight:600;line-height:1.3;color:var(--ink);
}
body.frontier-briefing:not(#_) details.conclusion-more > summary::-webkit-details-marker{display:none}
body.frontier-briefing:not(#_) details.conclusion-more > summary::before{
  content:"";flex:none;width:.85rem;height:.85rem;
  background:linear-gradient(currentColor,currentColor) center/100% 2px no-repeat,linear-gradient(currentColor,currentColor) center/2px 100% no-repeat;
}
body.frontier-briefing:not(#_) details.conclusion-more[open] > summary::before{background:linear-gradient(currentColor,currentColor) center/100% 2px no-repeat}
body.frontier-briefing:not(#_) details.conclusion-more > summary:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:.2em}
body.frontier-briefing:not(#_) details.conclusion-more > summary:focus-visible{outline:2px solid currentColor;outline-offset:3px}
body.frontier-briefing:not(#_) .conclusion-support{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(15rem,21rem);column-gap:clamp(2rem,4.5vw,4.5rem);
  align-items:start;margin-top:1rem;padding-top:1.25rem;border-top:1px solid var(--line);
}
body.frontier-briefing:not(#_) .conclusion-support > *{min-width:0}
body.frontier-briefing:not(#_) .conclusion-body p{max-width:66ch;margin:0 0 1rem;font-size:1.0625rem;font-weight:400;line-height:1.68;color:var(--ink)}
body.frontier-briefing:not(#_) .conclusion-body .conclusion-change{margin:.25rem 0 0;font-size:1rem;line-height:1.6;color:var(--soft)}
body.frontier-briefing:not(#_) .conclusion-change strong{font-weight:700;color:var(--ink)}
body.frontier-briefing:not(#_) .conclusion-evidence{position:relative;padding:.1rem 0 0 1.15rem}
body.frontier-briefing:not(#_) .conclusion-evidence::before{
  content:"";position:absolute;left:0;top:.35rem;bottom:.35rem;width:.45rem;border:1px solid var(--line-strong);border-right:0;
}
body.frontier-briefing:not(#_) .conclusion-evidence .evidence-head{margin:0 0 .5rem;font-size:.9375rem!important;font-weight:700;color:var(--ink)}
body.frontier-briefing:not(#_) .conclusion-evidence ul{margin:0;padding:0;list-style:none}
body.frontier-briefing:not(#_) .conclusion-evidence li{margin:0 0 .7rem;font-size:.9375rem;line-height:1.5;color:var(--soft)}
body.frontier-briefing:not(#_) .conclusion-evidence .evidence-kind{display:block;font-weight:600;color:var(--soft)}
body.frontier-briefing:not(#_) .conclusion-evidence a{
  color:var(--ink);overflow-wrap:anywhere;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.2em;
}

/* 4. The overview: the lanes as three drawn plates. Words and shapes carry the
   state; the one filled mark is the lane that changed. */
body.frontier-briefing:not(#_) .briefing-overview .body-text,
body.frontier-briefing:not(#_) .lane-head .lane-status{
  max-width:56ch;margin:1.1rem 0 0;opacity:1;
  font-family:var(--font-sans);font-size:var(--fsb-dek);line-height:1.55;
  letter-spacing:0;text-transform:none;color:var(--soft);
}
body.frontier-briefing:not(#_) .delta-rail{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));max-width:none;
  margin:clamp(2rem,4vw,3rem) 0 0;border:0;border-block:1px solid var(--line-strong);
}
body.frontier-briefing:not(#_) .delta-rail .rail-mark{
  display:grid;grid-template-columns:1.1rem minmax(0,1fr);gap:.35rem .75rem;align-items:center;
  flex:none;padding:1.3rem 1.25rem 1.4rem;border:0;color:var(--ink);text-decoration:none;
}
body.frontier-briefing:not(#_) .delta-rail .rail-mark:first-child{padding-left:0}
body.frontier-briefing:not(#_) .delta-rail .rail-mark + .rail-mark{border-left:1px solid var(--line)}
body.frontier-briefing:not(#_) :is(.rail-symbol,.status-mark){-webkit-print-color-adjust:exact;print-color-adjust:exact}
body.frontier-briefing:not(#_) .rail-symbol{
  display:block;grid-column:1;grid-row:1;width:.72rem;height:.72rem;margin:0;
  border:1.5px solid var(--ink);border-radius:0;background:transparent;transform:none;
}
body.frontier-briefing:not(#_) .rail-changed .rail-symbol{background:var(--hot);border-color:var(--hot);transform:rotate(45deg)}
body.frontier-briefing:not(#_) .rail-baseline .rail-symbol{transform:rotate(45deg)}
/* A correction is a hollow circle, so the one filled mark stays with what changed. */
body.frontier-briefing:not(#_) .rail-correction .rail-symbol{border-radius:50%;background:transparent}
body.frontier-briefing:not(#_) .rail-mark .rail-label{
  grid-column:2;grid-row:1;font-size:clamp(1.2rem,1rem + .6vw,1.5rem);font-weight:720;
  letter-spacing:-.02em;line-height:1.15;
}
body.frontier-briefing:not(#_) .rail-mark strong{
  grid-column:2;display:block;margin:0;font-family:var(--font-sans);font-size:.9375rem!important;
  font-weight:500;line-height:1.4;letter-spacing:0;text-transform:none;color:var(--soft);
}
body.frontier-briefing:not(#_) .rail-mark:is(:hover,:focus-visible) .rail-label{
  text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.18em;
}
body.frontier-briefing:not(#_) .briefing-links{
  margin:1.25rem 0 0;font-family:var(--font-sans);font-size:.9375rem!important;line-height:1.7;
  letter-spacing:0;text-transform:none;color:var(--soft);
}
body.frontier-briefing:not(#_) :is(.briefing-links,.footer-seal) a{
  color:var(--ink);border:0;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.2em;
}

/* 5. Records: the claim at the left, its limit and its sources beside it, each
   record on a hairline. */
body.frontier-briefing:not(#_) .lane .record{
  display:block;max-width:none;margin:0;padding:clamp(1.75rem,3.5vw,2.75rem) 0;
  border:0;border-top:1px solid var(--line);
}
body.frontier-briefing:not(#_) .lane-head + .record{margin-top:clamp(2rem,4vw,3rem)}
body.frontier-briefing:not(#_) .lane .record:last-child{padding-bottom:0}
body.frontier-briefing:not(#_) .record-index{display:none}
body.frontier-briefing:not(#_) .record-body{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(15rem,21rem);
  grid-template-rows:auto auto 1fr;column-gap:clamp(2rem,4.5vw,4.5rem);align-items:start;
}
body.frontier-briefing:not(#_) .record-body > *{grid-column:1;min-width:0}
body.frontier-briefing:not(#_) .record-body > .record-limits{grid-column:2;grid-row:1 / -1}
/* The title leads; the byline under it carries the change note, the source role, the
   dates and the confidence. */
body.frontier-briefing:not(#_) .record-meta{
  display:flex;flex-wrap:wrap;gap:.2rem 1.35rem;margin:0 0 .9rem;
  font-family:var(--font-sans);font-size:.9375rem!important;line-height:1.5;
  letter-spacing:0;text-transform:none;color:var(--soft);
}
body.frontier-briefing:not(#_) .record-meta .record-role{font-weight:650;color:var(--ink)}
body.frontier-briefing:not(#_) .record-meta .record-change{
  display:inline-flex;align-items:center;gap:.6rem;font-weight:700;color:var(--ink);
}
body.frontier-briefing:not(#_) .status-mark{flex:none;width:.72rem;height:.72rem;background:var(--hot);transform:rotate(45deg)}
body.frontier-briefing:not(#_) .record[data-status="correction"] .status-mark{
  transform:none;border-radius:50%;background:transparent;border:1.5px solid var(--ink);
}
body.frontier-briefing:not(#_) .record-body h3{
  max-width:34ch;margin:0 0 .5rem;font-family:var(--font-sans);
  font-size:clamp(1.4rem,1.1rem + 1vw,2rem);font-weight:740;letter-spacing:-.022em;
  line-height:1.12;color:var(--ink);
}
body.frontier-briefing:not(#_) .record-body > p{
  max-width:62ch;margin:0;font-family:var(--font-sans);font-size:1.125rem;line-height:1.7;color:var(--ink);opacity:1;
}
body.frontier-briefing:not(#_) .record-limits{margin:0}
/* The limit hangs in a drawn bracket, a measure of how far the claim reaches. */
body.frontier-briefing:not(#_) .record-limits .boundary{
  position:relative;display:block;max-width:none;margin:0;padding:.1rem 0 0 1.15rem;
  border:0;background:none;
}
body.frontier-briefing:not(#_) .record-limits .boundary::before{
  content:"";position:absolute;left:0;top:.35rem;bottom:.35rem;width:.45rem;
  border:1px solid var(--line-strong);border-right:0;
}
body.frontier-briefing:not(#_) .record-limits .boundary strong{
  display:block;margin:0 0 .45rem;font-family:var(--font-sans);font-size:.9375rem!important;
  font-weight:700;letter-spacing:0;text-transform:none;color:var(--ink);
}
body.frontier-briefing:not(#_) .record-limits .boundary p{margin:0;max-width:none;font-size:1rem;line-height:1.6;color:var(--soft)}
body.frontier-briefing:not(#_) .record-limits .source-line{
  margin:1.5rem 0 0;padding:1rem 0 0 1.15rem;border-top:1px solid var(--line);
  font-family:var(--font-sans);font-size:.9375rem!important;line-height:1.5;color:var(--soft)!important;
}
body.frontier-briefing:not(#_) .record-limits .source-line strong{
  display:block;margin:0 0 .35rem;font-weight:700;letter-spacing:0;text-transform:none;color:var(--ink);
}
body.frontier-briefing:not(#_) .record-limits .source-line a{
  display:block;width:fit-content;max-width:100%;margin:0 0 .4rem;color:var(--ink);border:0;
  text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.2em;
}

/* 6. Evidence tables: ruled source and control matrices on hairlines. */
body.frontier-briefing:not(#_) :is(.source-evidence,.controls) .table-wrap{max-width:none;margin:clamp(1.5rem,3vw,2.25rem) 0 0;overflow-x:auto}
body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table){width:100%;border-collapse:collapse;table-layout:auto}
body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) caption{
  caption-side:top;max-width:66ch;padding:0 0 1.25rem;text-align:left;
  font-family:var(--font-sans);font-size:.9375rem;line-height:1.6;color:var(--soft);
}
body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) caption strong{font-weight:700;color:var(--ink)}
body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) :is(th,td){
  min-width:0;padding:1rem 1.5rem 1.15rem 0;border:0;border-top:1px solid var(--line);
  vertical-align:top;text-align:left;background:none;
  font-family:var(--font-sans);font-size:1rem;line-height:1.6;letter-spacing:0;text-transform:none;color:var(--soft);
}
body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) thead th{
  padding-block:.6rem;border-top:0;border-bottom:1px solid var(--line-strong);
  font-size:.9375rem;font-weight:600;color:var(--soft);
}
body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) tbody th{
  width:11rem;font-size:1.125rem;font-weight:720;letter-spacing:-.01em;line-height:1.35;color:var(--ink);
}
body.frontier-briefing:not(#_) .source-evidence-table tbody th{width:16rem}
body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) tbody td:last-child{padding-right:0}
body.frontier-briefing:not(#_) .source-evidence-table tbody td{min-width:10rem}
body.frontier-briefing:not(#_) .source-evidence-table tbody td:last-child{min-width:18rem}
body.frontier-briefing:not(#_) .source-evidence-table td strong{color:var(--ink)}
body.frontier-briefing:not(#_) .source-evidence-table .matrix-source-links{display:block;margin-top:.75rem;font-size:.9375rem;line-height:1.5}
body.frontier-briefing:not(#_) .source-evidence-table .matrix-source-links strong{display:block;margin:0 0 .3rem;font-weight:700;color:var(--ink)}
body.frontier-briefing:not(#_) .source-evidence-table .matrix-source-links a{
  display:block;width:fit-content;max-width:100%;margin:0 0 .35rem;color:var(--ink);
  text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.2em;
}
body.frontier-briefing:not(#_) .controls-table .status-word{
  display:inline-block;margin:0 0 .2rem;font-family:var(--font-sans);font-size:1rem;
  font-weight:700;letter-spacing:0;text-transform:none;color:var(--ink);
}
body.frontier-briefing:not(#_) .controls-table a{color:var(--ink)}
/* Each control names its sources, as each record does. */
body.frontier-briefing:not(#_) .controls-table .control-sources{display:block;margin-top:.75rem;font-size:.9375rem;line-height:1.5}
body.frontier-briefing:not(#_) .controls-table .control-sources strong{display:block;margin:0 0 .3rem;font-weight:700;color:var(--ink)}
body.frontier-briefing:not(#_) .controls-table .control-sources a{
  display:block;width:fit-content;max-width:100%;margin:0 0 .35rem;
  text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.2em;
}

/* 7. Open questions: numbered rows on hairlines, set larger than body text. */
body.frontier-briefing:not(#_) .questions ol{
  counter-reset:fsb-question;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  column-gap:clamp(2rem,4vw,3.5rem);max-width:none;margin:clamp(1.75rem,3.5vw,2.5rem) 0 0;
  padding:0;border:0;list-style:none;
}
body.frontier-briefing:not(#_) .questions li{
  counter-increment:fsb-question;position:static;display:grid;
  grid-template-columns:2.75rem minmax(0,1fr);column-gap:.75rem;min-height:0;margin:0;
  padding:1.2rem 0 1.4rem;border:0;border-top:1px solid var(--line);
  font-size:clamp(1.0625rem,1rem + .25vw,1.1875rem);line-height:1.55;color:var(--ink);
}
body.frontier-briefing:not(#_) .questions li::before{
  content:counter(fsb-question,decimal-leading-zero);
  content:counter(fsb-question,decimal-leading-zero) / "";
  position:static;padding-top:.15rem;font-family:var(--font-sans);font-size:1rem;
  font-weight:700;line-height:1.4;font-variant-numeric:tabular-nums;color:var(--soft);
}

/* 8. Method, corrections and limits: a rail of three rows, heading beside text. */
body.frontier-briefing:not(#_) .method-grid{display:block;max-width:none;margin:clamp(1.75rem,3.5vw,2.5rem) 0 0;border:0}
body.frontier-briefing:not(#_) .method-grid > div,
body.frontier-briefing:not(#_) .method-grid > div + div{
  display:grid;grid-template-columns:minmax(0,14rem) minmax(0,1fr);column-gap:clamp(1.5rem,4vw,3.5rem);
  padding:1.3rem 0 1.5rem;border:0;border-top:1px solid var(--line);
}
body.frontier-briefing:not(#_) .method-grid h3{
  margin:0;font-family:var(--font-sans);font-size:clamp(1.2rem,1.05rem + .5vw,1.45rem);
  font-weight:720;letter-spacing:-.015em;line-height:1.2;color:var(--ink);
}
body.frontier-briefing:not(#_) .method-grid :is(p,ul){max-width:62ch;margin:0;font-size:1.0625rem;line-height:1.65;color:var(--soft)}
body.frontier-briefing:not(#_) .method-grid ul{padding-left:1.1rem}

/* 9. The colophon on a hairline. */
body.frontier-briefing:not(#_) .footer-seal{
  margin:clamp(4.5rem,10vw,8rem) var(--fsb-shell) 0;padding:1.25rem 0 clamp(2.5rem,6vw,4rem);
  border-top:1px solid var(--line-strong);
}
/* The shared inner-clean seal is a rounded capsule; the colophon is plain text. */
body.frontier-briefing:not(#_) .footer-seal .seal{
  display:block;max-width:none;margin:0;padding:0;border:0;border-radius:0;background:none;
  font-family:var(--font-sans);font-size:.9375rem;line-height:1.7;letter-spacing:0;
  text-transform:none;color:var(--soft);
}

/* 10. Narrow screens: one column; the numeral sits above its heading. */
@media (max-width:52rem){
  body.frontier-briefing:not(#_) .briefing-intro{
    grid-template-columns:minmax(0,1fr);grid-template-areas:"path" "title" "plate" "lede" "cover";
  }
  body.frontier-briefing:not(#_) .briefing-intro > .lede{margin-top:1.75rem}
  body.frontier-briefing:not(#_) main > section.mv{grid-template-columns:minmax(0,1fr)}
  body.frontier-briefing:not(#_) main > section.mv::before{padding:0 0 .7rem}
  body.frontier-briefing:not(#_) main > section.mv > *{grid-column:1}
  body.frontier-briefing:not(#_) :is(.record-body,.conclusion-support){display:block}
  body.frontier-briefing:not(#_) :is(.record-limits,.conclusion-evidence){margin-top:1.5rem}
  body.frontier-briefing:not(#_) .questions ol{grid-template-columns:minmax(0,1fr)}
  body.frontier-briefing:not(#_) .method-grid > div,
  body.frontier-briefing:not(#_) .method-grid > div + div{grid-template-columns:minmax(0,1fr);row-gap:.6rem}
}
@media (max-width:40rem){
  body.frontier-briefing:not(#_) .delta-rail{grid-template-columns:minmax(0,1fr)}
  body.frontier-briefing:not(#_) .delta-rail .rail-mark,
  body.frontier-briefing:not(#_) .delta-rail .rail-mark:first-child{padding:1rem 0}
  body.frontier-briefing:not(#_) .delta-rail .rail-mark + .rail-mark{border-left:0;border-top:1px solid var(--line)}
}
/* A phone stacks each control row. The explicit table roles in the markup keep the
   row and column semantics when the cells stop displaying as a table. */
@media screen and (max-width:44rem){
  body.frontier-briefing:not(#_) :is(.source-evidence,.controls) .table-wrap{overflow:visible}
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table),
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) :is(caption,thead,tbody,tr,th,td){display:block;width:auto}
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) thead{
    position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;
  }
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) tbody tr{padding:1rem 0 1.15rem;border-top:1px solid var(--line-strong)}
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) tbody :is(th,td){min-width:0;padding:0;border:0}
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) tbody th{margin-bottom:.6rem}
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) tbody td + td{margin-top:.9rem}
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) td::before{
    content:attr(data-label);
    content:attr(data-label) / "";
    display:block;margin-bottom:.2rem;font-size:.9375rem;font-weight:600;color:var(--ink);
  }
}

/* 11. Forced colors: drawn marks become system ink; gradient marks step aside. */
@media (forced-colors:active){
  body.frontier-briefing:not(#_) main > section.mv::after,
  body.frontier-briefing:not(#_) .edition-plate::after{display:none}
  body.frontier-briefing:not(#_) :is(.rail-symbol,.status-mark){forced-color-adjust:none;border-color:CanvasText}
  body.frontier-briefing:not(#_) :is(.rail-changed .rail-symbol,.record:not([data-status="correction"]) .status-mark){background:CanvasText}
  body.frontier-briefing:not(#_) .edition-plate{border-color:CanvasText}
}

/* 12. Print: one column on white paper; plate.css and art.css drop the field and art. */
@media print{
  body.frontier-briefing:not(#_) .frame.briefing-hero{padding:0}
  body.frontier-briefing:not(#_) :is(.briefing-intro,main > section.mv,.record-body,.questions ol,.conclusion-support){display:block}
  body.frontier-briefing:not(#_) .conclusion-evidence{margin-top:.75rem}
  /* Paper cannot open a disclosure, so every conclusion prints with its support. */
  body.frontier-briefing:not(#_) details.conclusion-more::details-content{content-visibility:visible;display:block}
  body.frontier-briefing:not(#_) details.conclusion-more > summary::before{display:none}
  body.frontier-briefing:not(#_) :is(.method-grid > div,.method-grid > div + div){display:block}
  body.frontier-briefing:not(#_) :is(main#main,.footer-seal){padding-inline:0;margin-inline:0}
  body.frontier-briefing:not(#_) main > section.mv{margin-top:1.75rem}
  body.frontier-briefing:not(#_) main > section.mv::before{display:block;margin-bottom:.5rem}
  body.frontier-briefing:not(#_) main > section.mv::after,
  body.frontier-briefing:not(#_) .edition-plate::after{display:none}
  body.frontier-briefing:not(#_) .edition-plate{margin-top:1rem;background:none}
  body.frontier-briefing:not(#_) .record-limits{margin-top:.75rem}
  body.frontier-briefing:not(#_) .record-limits .boundary p{max-width:62ch}
  body.frontier-briefing:not(#_) :is(.record,.questions li,.method-grid > div){break-inside:avoid}
  /* print.css sets every size with !important, so the ladder answers with it: title,
     date, section (print.css 13pt), record, lane, then body text and labels at 10pt. */
  body.frontier-briefing:not(#_) .briefing-intro h1{font-size:22pt!important;line-height:1.05}
  body.frontier-briefing:not(#_) .edition-readout > div:first-child dd{font-size:16pt!important;line-height:1.1}
  body.frontier-briefing:not(#_) .record-body h3{font-size:12pt!important}
  body.frontier-briefing:not(#_) .rail-mark .rail-label{font-size:11pt}
  body.frontier-briefing:not(#_) :is(.source-evidence-table,.controls-table) tbody th{font-size:10.5pt!important}
  body.frontier-briefing:not(#_) :is(.edition-readout dt,.edition-readout > div:not(:first-child) dd,.record-meta,.source-line,.briefing-links,.boundary strong,.rail-mark strong,.source-evidence-table caption,.source-evidence-table thead th,.controls-table caption,.controls-table thead th,.status-word,.matrix-source-links,.control-sources,.conclusion-change,.conclusion-evidence li){font-size:10pt!important}
  /* print.css clears every fill and fades every border; the drawn marks keep both, so
     shape still carries status on paper. */
  body.frontier-briefing:not(#_) :is(.rail-symbol,.record[data-status="correction"] .status-mark){border-color:#000!important}
  body.frontier-briefing:not(#_) :is(.rail-changed .rail-symbol,.record:not([data-status="correction"]) .status-mark){
    background-color:#000!important;background-image:linear-gradient(#000,#000)!important;
  }
}