/* Decision-brief layer for /signal.html. Page-local legacy CSS remains critical-path. */
:root { --wide: 1100px; }

.wide-wrap { max-width: var(--wide); margin: 0 auto; padding: 0 24px; }

.masthead {
  max-width: var(--wide);
  padding-top: 48px;
  padding-bottom: 34px;
}

.masthead h1 {
  max-width: 920px;
  font-size: clamp(2.5rem, 5.8vw, 4.6rem);
  line-height: .98;
}

.standfirst {
  max-width: 760px;
  font-size: 1.1rem;
}

.brief-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 22px;
  color: var(--slate);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.brief-meta span + span::before {
  content: "·";
  margin-right: 18px;
  color: var(--rule);
}

.factbar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(240px, 1.4fr);
  gap: 0;
  margin-top: 26px;
  padding-top: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.factbar > div {
  min-height: 92px;
  display: grid;
  align-content: center;
  gap: 3px;
  padding: 15px 18px;
  border-right: 1px solid var(--rule);
}

.factbar > div:first-child { padding-left: 0; }
.factbar > div:last-child { border-right: 0; }
.factbar .val { margin: 0; font-size: 1.35rem; }
.factbar .val.sig { color: var(--signal); }

.method-disclosure {
  max-width: 780px;
  margin-top: 16px;
  color: var(--muted);
  font-size: .86rem;
}

.method-disclosure strong { color: var(--ink); font-weight: 600; }
.method-disclosure a { color: var(--signal); text-underline-offset: 3px; }

.brief-nav {
  position: sticky;
  top: 115px;
  z-index: 30;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: rgba(242, 239, 230, .94);
  backdrop-filter: blur(10px);
}

.brief-nav .wide-wrap {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.brief-nav .wide-wrap::-webkit-scrollbar { display: none; }

.brief-nav a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  padding: 0 12px;
  color: var(--slate);
  font-family: var(--mono);
  font-size: .6rem;
  letter-spacing: .08em;
  text-decoration: none;
  text-transform: uppercase;
}

.brief-nav a:hover { color: var(--signal); }

.executive-summary {
  padding-top: 52px;
  padding-bottom: 58px;
}

.section-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .48fr);
  align-items: end;
  gap: 30px;
  margin-bottom: 26px;
}

.section-intro h2,
.map-head h2,
.model h2,
.noise h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 3.3vw, 2.8rem);
  line-height: 1.05;
}

.section-intro p,
.map-head p {
  margin: 0;
  color: var(--muted);
  font-size: .94rem;
  line-height: 1.55;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.summary-card {
  min-height: 280px;
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: rgba(255, 255, 255, .58);
}

.summary-card { border-top: 3px solid var(--signal); }
.summary-card:hover { border-color: rgba(179, 102, 31, .52); transform: translateY(-3px); box-shadow: 0 14px 30px rgba(24,27,34,.10); }
.summary-card .sm { color: var(--signal); font-family: var(--mono); font-size: .58rem; letter-spacing: .08em; text-transform: uppercase; }
.summary-card h3 { margin: 18px 0 12px; font-family: var(--display); font-size: clamp(1.35rem, 2.1vw, 1.8rem); line-height: 1.08; }
.summary-card p { margin: 0; color: var(--muted); font-size: .92rem; line-height: 1.48; }
.summary-card a { margin-top: auto; padding-top: 22px; color: var(--signal); font-family: var(--mono); font-size: .62rem; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }

.unresolved {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 22px;
  margin-top: 14px;
  padding: 18px 20px;
  border: 1px dashed var(--rule);
  color: var(--muted);
  font-size: .88rem;
}

.unresolved[hidden] { display: none; }
.unresolved strong { color: var(--ink); font-family: var(--display); font-size: 1rem; }
.unresolved span { color: var(--signal); font-family: var(--mono); font-size: .6rem; letter-spacing: .08em; text-transform: uppercase; }

.evidence-map {
  padding: 50px 0 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: #efece2;
}

.map-head {
  display: grid;
  grid-template-columns: 1fr minmax(260px, .5fr);
  align-items: end;
  gap: 32px;
  padding-bottom: 24px;
}

.spine { margin: 0; border: 0; background: transparent; }
.spine svg { max-width: var(--wide); }
.mobile-spine { display: none; }

.attractors {
  max-width: var(--wide);
  padding-top: 64px;
  padding-bottom: 20px;
}

.lead-label { margin: 0 0 20px; }
.attractor { padding: 42px 0 54px; scroll-margin-top: 168px; border-top: 2px solid var(--signal); }

.attractor-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
}

.attractor .an { color: var(--signal); }
.attractor h3 { max-width: 850px; margin: 12px 0; font-size: clamp(1.8rem, 4vw, 3.15rem); line-height: 1.04; }
.attractor .thesis { max-width: 780px; margin-bottom: 0; font-size: 1.2rem; }

.strength-badge {
  min-width: 116px;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .58rem;
  letter-spacing: .07em;
  text-align: center;
  text-transform: uppercase;
}

.strength-badge strong { color: var(--signal); font-weight: 500; }

.strength-line {
  margin: 20px 0 0;
  padding: 12px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  color: var(--slate);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.insight-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, .78fr);
  gap: 14px;
  margin-top: 24px;
}

.insight-box {
  min-height: 220px;
  padding: 22px;
  border: 1px solid var(--rule);
  background: rgba(255, 255, 255, .45);
}

.insight-box.decision {
  border-color: rgba(179, 102, 31, .38);
  background: rgba(179, 102, 31, .07);
}

.box-label {
  display: block;
  margin-bottom: 12px;
  color: var(--signal);
  font-family: var(--mono);
  font-size: .6rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.insight-box p { margin: 0; color: var(--muted); line-height: 1.58; }
.insight-box.decision p { color: var(--ink); font-family: var(--display); font-size: 1.18rem; line-height: 1.45; }

.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

.action-box {
  padding: 22px;
  border-top: 3px solid var(--signal);
  background: rgba(179, 102, 31, .07);
}

.action-box.watch { border-top-color: var(--rule); background: var(--card); }
.action-box.watch .box-label { color: var(--slate); }
.action-box ul { margin: 0; padding-left: 18px; }
.action-box li { color: var(--muted); font-size: .92rem; line-height: 1.48; }
.action-box li + li { margin-top: 9px; }

.disconfirm {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 20px;
  margin-top: 14px;
  padding: 18px 20px;
  border: 1px dashed var(--rule);
  color: var(--muted);
  font-size: .9rem;
}

.disconfirm .box-label { margin: 2px 0 0; color: var(--slate); }

.evidence-drawer,
.method-drawer,
.noise-drawer {
  margin-top: 14px;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: rgba(255, 255, 255, .42);
}

.evidence-drawer > summary,
.method-drawer > summary,
.noise-drawer > summary {
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--signal);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.evidence-drawer > summary::-webkit-details-marker,
.method-drawer > summary::-webkit-details-marker,
.noise-drawer > summary::-webkit-details-marker { display: none; }

.evidence-drawer > summary::after,
.method-drawer > summary::after,
.noise-drawer > summary::after { content: "+"; float: right; }

.evidence-drawer[open] > summary::after,
.method-drawer[open] > summary::after,
.noise-drawer[open] > summary::after { content: "−"; }

.evidence-inner { padding: 0 16px 18px; border-top: 1px solid var(--rule); }
.trace-grid { margin-bottom: 12px; }
.sigs { margin-top: 0; }

.model {
  max-width: var(--wide);
  padding-top: 54px;
  padding-bottom: 54px;
  scroll-margin-top: 168px;
}

.model-head {
  display: grid;
  grid-template-columns: 1fr minmax(280px, .55fr);
  gap: 30px;
  align-items: end;
}

.model-head p { margin: 0; }
.method-drawer { margin-top: 24px; }
.method-inner { padding: 18px; border-top: 1px solid var(--rule); }
.method-inner > p { max-width: 820px; }

.integrity-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 18px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.integrity-grid div { padding: 14px; border-right: 1px solid var(--rule); }
.integrity-grid div:last-child { border-right: 0; }
.integrity-grid b { display: block; color: var(--signal); font-family: var(--display); font-size: 1.3rem; }
.integrity-grid span { color: var(--slate); font-family: var(--mono); font-size: .56rem; letter-spacing: .07em; text-transform: uppercase; }

.noise {
  max-width: var(--wide);
  padding-top: 46px;
  padding-bottom: 46px;
  scroll-margin-top: 168px;
}

.noise .sub { margin-bottom: 18px; }
.noise-drawer { margin-top: 0; }
.noise-inner { padding: 18px; border-top: 1px solid var(--rule); }

#summary,
#directions,
#map,
#decisions { scroll-margin-top: 168px; }

@media(max-width:900px){
  .factbar { grid-template-columns: repeat(2, 1fr); }
  .factbar > div { border-bottom: 1px solid var(--rule); }
  .factbar > div:nth-child(2n) { border-right: 0; }
  .factbar > div:last-child { grid-column: 1 / -1; border-bottom: 0; }
  .factbar > div:first-child { padding-left: 18px; }
  .section-intro,
  .map-head,
  .model-head,
  .attractor-head,
  .insight-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .strength-badge { width: fit-content; }
}

@media(max-width:680px){
  .wide-wrap,
  .wrap { padding-left: 18px; padding-right: 18px; }
  .masthead { padding-top: 32px; padding-bottom: 24px; }
  .masthead h1 { font-size: clamp(2.05rem, 8.8vw, 2.75rem); }
  .standfirst { margin-top: 14px; font-size: .98rem; line-height: 1.5; }
  .brief-meta { margin-top: 16px; }
  .brief-meta span + span::before { display: none; }
  .factbar { grid-template-columns: 1fr 1fr; }
  .factbar > div { min-height: 68px; padding: 10px; }
  .factbar > div:first-child { padding-left: 10px; }
  .factbar > div:last-child { display: none; }
  .factbar .val { font-size: 1.12rem; }
  .method-disclosure { margin-top: 12px; font-size: .78rem; line-height: 1.45; }
  .brief-nav { top: 113px; }
  .brief-nav .wide-wrap { padding: 0 10px; }
  .executive-summary { padding-top: 38px; padding-bottom: 42px; }
  .section-intro { gap: 12px; margin-bottom: 20px; }
  .section-intro h2 { font-size: 2rem; }
  .section-intro p { font-size: .88rem; }
  .summary-grid { grid-template-columns: 1fr; }
  .summary-card { min-height: 238px; }
  .unresolved { grid-template-columns: 1fr; gap: 6px; }
  .evidence-map { padding-top: 38px; }
  .spine svg { display: none; }
  .mobile-spine { display: grid; gap: 8px; padding-bottom: 26px; }
  .mobile-path { display: grid; grid-template-columns: 74px 20px 1fr; align-items: center; gap: 8px; padding: 12px 14px; border: 1px solid var(--rule); background: rgba(255,255,255,.5); }
  .mobile-path span { color: var(--signal); font-family: var(--mono); font-size: .58rem; letter-spacing: .05em; text-transform: uppercase; }
  .mobile-path i { color: var(--signal); font-style: normal; }
  .mobile-path strong { font-family: var(--display); font-size: .98rem; line-height: 1.2; }
  .attractors { padding-top: 44px; }
  .attractor { padding: 34px 0 42px; }
  .attractor h3 { font-size: 2rem; }
  .strength-line { line-height: 1.6; }
  .insight-box { min-height: auto; }
  .action-grid { grid-template-columns: 1fr; }
  .disconfirm { grid-template-columns: 1fr; gap: 4px; }
  .trace-grid { grid-template-columns: 1fr; }
  .model,
  .noise { padding-top: 42px; padding-bottom: 42px; }
  .integrity-grid { grid-template-columns: 1fr; }
  .integrity-grid div { border-right: 0; border-bottom: 1px solid var(--rule); }
  .integrity-grid div:last-child { border-bottom: 0; }
}