/* BayesARC Evidence Spine v5 — premium evidence-continuity section */
body.bx4-home .bx4-spine.bx5-evidence-spine {
  position:relative;
  isolation:isolate;
  overflow:hidden;
  padding:clamp(96px,9vw,148px) 0 clamp(86px,8vw,128px);
  background:
    radial-gradient(circle at 12% 18%,rgba(75,92,255,.14),transparent 27rem),
    radial-gradient(circle at 84% 12%,rgba(80,52,235,.24),transparent 31rem),
    radial-gradient(circle at 78% 76%,rgba(7,178,194,.11),transparent 25rem),
    linear-gradient(135deg,#081226 0%,#0b1530 42%,#101939 72%,#0a132a 100%);
  color:#f7f9ff;
}
body.bx4-home .bx4-spine.bx5-evidence-spine::before {
  content:"";
  position:absolute;
  inset:0;
  z-index:-2;
  pointer-events:none;
  opacity:.36;
  background-image:
    linear-gradient(rgba(148,166,218,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(148,166,218,.06) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:linear-gradient(to bottom,#000 0%,#000 58%,transparent 100%);
  mask-image:linear-gradient(to bottom,#000 0%,#000 58%,transparent 100%);
}
body.bx4-home .bx4-spine.bx5-evidence-spine::after {
  content:"";
  position:absolute;
  z-index:-1;
  width:min(760px,62vw);
  aspect-ratio:1.8;
  right:-8vw;
  top:8%;
  border-radius:50%;
  border:1px solid rgba(126,110,255,.15);
  box-shadow:
    0 0 0 26px rgba(126,110,255,.025),
    0 0 0 58px rgba(45,180,204,.018),
    0 0 120px rgba(80,52,235,.08);
  transform:rotate(-12deg);
  pointer-events:none;
}
body.bx4-home .bx4-spine.bx5-evidence-spine > .shell {
  width:min(1500px,calc(100% - 64px));
}

/* Hero framing */
body.bx4-home .bx5-evidence-spine .bx4-spine-head {
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(420px,.92fr);
  gap:clamp(52px,7vw,110px);
  align-items:center;
  margin-bottom:48px;
}
body.bx4-home .bx5-evidence-spine .bx5-spine-title {
  position:relative;
  min-width:0;
}
body.bx4-home .bx5-evidence-spine .bx4-eyebrow {
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:#9b8cff;
  font-size:.66rem;
  font-weight:900;
  letter-spacing:.18em;
}
body.bx4-home .bx5-evidence-spine .bx4-eyebrow::before {
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:#8a78ff;
  box-shadow:0 0 0 6px rgba(138,120,255,.10),0 0 20px rgba(138,120,255,.38);
}
body.bx4-home .bx5-evidence-spine .bx4-spine-head h2 {
  max-width:860px;
  margin:20px 0 0;
  color:#fff;
  font-size:clamp(3.65rem,5.7vw,6.5rem);
  line-height:.88;
  letter-spacing:-.074em;
  font-weight:820;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-head h2 > span,
body.bx4-home .bx5-evidence-spine .bx4-spine-head h2 > em {
  display:block;
  font-style:normal;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-head h2 > em {
  margin-top:9px;
  background:linear-gradient(98deg,#cbd5ff 0%,#9f94ff 43%,#7b65ff 73%,#4dd8df 118%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
body.bx4-home .bx5-evidence-spine .bx5-spine-manifesto {
  display:block;
  margin-top:23px;
  color:#8291bc;
  font:800 .63rem/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;
  letter-spacing:.17em;
}
body.bx4-home .bx5-evidence-spine .bx5-spine-intro {
  position:relative;
  padding-left:38px;
  border-left:1px solid rgba(126,110,255,.55);
}
body.bx4-home .bx5-evidence-spine .bx5-spine-intro > p {
  max-width:610px;
  margin:0;
  color:#bdc6db;
  font-size:clamp(1.02rem,1.35vw,1.18rem);
  line-height:1.66;
}
body.bx4-home .bx5-evidence-spine .bx5-spine-principles {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px;
  margin-top:28px;
}
body.bx4-home .bx5-evidence-spine .bx5-spine-principles > span {
  min-width:0;
  display:grid;
  grid-template-columns:34px 1fr;
  align-items:center;
  gap:9px;
  padding:12px 10px;
  border-top:1px solid rgba(141,153,194,.2);
  color:#a9b5d0;
}
body.bx4-home .bx5-evidence-spine .bx5-spine-principles i {
  display:grid;
  place-items:center;
  width:32px;
  height:32px;
  border:1px solid rgba(125,108,255,.4);
  border-radius:10px;
  background:rgba(111,91,255,.1);
  color:#a99cff;
  font-size:.72rem;
  box-shadow:inset 0 0 18px rgba(112,92,255,.08);
}
body.bx4-home .bx5-evidence-spine .bx5-spine-principles b {
  color:#a8b5d1;
  font-size:.6rem;
  line-height:1.4;
  letter-spacing:.08em;
  text-transform:uppercase;
}

/* Eight-stage evidence spine */
body.bx4-home .bx5-evidence-spine .bx4-spine-track {
  --bx5-line-y:54px;
  position:relative;
  display:grid;
  grid-template-columns:repeat(8,minmax(0,1fr));
  gap:11px;
  padding:24px 0 0;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-line {
  position:absolute;
  left:4.4%;
  right:4.4%;
  top:var(--bx5-line-y);
  z-index:0;
  height:2px;
  border-radius:999px;
  background:linear-gradient(90deg,rgba(112,92,255,.35) 0%,#725fff 22%,#5c77ff 48%,#29b4ca 72%,rgba(41,180,202,.28) 100%);
  box-shadow:0 0 12px rgba(93,97,255,.32),0 0 24px rgba(34,171,196,.13);
}
body.bx4-home .bx5-evidence-spine .bx4-spine-line::after {
  content:"";
  position:absolute;
  inset:-1px;
  border-radius:inherit;
  opacity:.55;
  background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.8) 50%,transparent 100%);
  transform:scaleX(.22);
  transform-origin:left center;
  animation:bx5SpineSweep 5.5s ease-in-out infinite;
}
@keyframes bx5SpineSweep {
  0%,16% { transform:translateX(0) scaleX(.17); opacity:0; }
  35% { opacity:.65; }
  82% { transform:translateX(470%) scaleX(.17); opacity:.5; }
  100% { transform:translateX(520%) scaleX(.17); opacity:0; }
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track > article {
  --bx5-accent:#7868ff;
  --bx5-soft:rgba(120,104,255,.14);
  position:relative;
  z-index:1;
  min-width:0;
  min-height:242px;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  padding:18px 14px 16px;
  border:1px solid rgba(143,158,204,.18);
  border-radius:20px;
  background:
    linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.018)),
    rgba(13,23,49,.72);
  backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.025),0 15px 36px rgba(0,0,0,.10);
  transition:transform .2s ease,border-color .2s ease,background .2s ease,box-shadow .2s ease;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track > article::before {
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:2px;
  border-radius:20px 0 0 20px;
  background:linear-gradient(180deg,var(--bx5-accent),transparent 72%);
  opacity:.76;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track > article::after {
  content:"";
  position:absolute;
  left:31px;
  top:28px;
  z-index:-1;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--bx5-accent);
  box-shadow:0 0 0 7px var(--bx5-soft),0 0 20px var(--bx5-accent);
  opacity:.88;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track > article:hover {
  transform:translateY(-5px);
  border-color:color-mix(in srgb,var(--bx5-accent) 48%,rgba(143,158,204,.18));
  background:
    linear-gradient(180deg,color-mix(in srgb,var(--bx5-accent) 10%,rgba(255,255,255,.045)),rgba(255,255,255,.022)),
    rgba(14,24,52,.88);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04),0 22px 44px rgba(0,0,0,.18),0 0 28px var(--bx5-soft);
}
body.bx4-home .bx5-evidence-spine .bx5-state-retrieved { --bx5-accent:#65a6ff;--bx5-soft:rgba(101,166,255,.14); }
body.bx4-home .bx5-evidence-spine .bx5-state-predicted { --bx5-accent:#9b72ff;--bx5-soft:rgba(155,114,255,.15); }
body.bx4-home .bx5-evidence-spine .bx5-state-computed { --bx5-accent:#31cee1;--bx5-soft:rgba(49,206,225,.14); }
body.bx4-home .bx5-evidence-spine .bx5-state-measured { --bx5-accent:#42e0a8;--bx5-soft:rgba(66,224,168,.14); }
body.bx4-home .bx5-evidence-spine .bx5-state-human-reviewed { --bx5-accent:#d6dff3;--bx5-soft:rgba(214,223,243,.11); }
body.bx4-home .bx5-evidence-spine .bx4-spine-track article > b {
  position:relative;
  z-index:2;
  width:42px;
  height:42px;
  margin:0 0 28px;
  border:1px solid color-mix(in srgb,var(--bx5-accent) 58%,transparent);
  border-radius:14px;
  background:linear-gradient(145deg,color-mix(in srgb,var(--bx5-accent) 18%,#171f42),#121b38 72%);
  color:color-mix(in srgb,var(--bx5-accent) 82%,#fff);
  box-shadow:0 0 0 7px rgba(7,15,34,.72),0 10px 26px rgba(0,0,0,.18),inset 0 1px 0 rgba(255,255,255,.08);
  font-size:.68rem;
  font-weight:900;
}
body.bx4-home .bx5-evidence-spine .bx5-stage-icon {
  position:absolute;
  top:18px;
  right:14px;
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  border:1px solid rgba(145,158,197,.15);
  border-radius:11px;
  background:rgba(255,255,255,.025);
  color:color-mix(in srgb,var(--bx5-accent) 62%,#8491b0);
  font-size:.73rem;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track article > div {
  display:grid;
  gap:6px;
  min-height:76px;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track article small {
  color:#8f9dbb;
  font-size:.59rem;
  font-weight:850;
  letter-spacing:.02em;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track article strong {
  color:#f5f7fd;
  font-size:.76rem;
  line-height:1.4;
  letter-spacing:-.015em;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track article em {
  position:relative;
  align-self:flex-start;
  margin-top:auto;
  padding:7px 10px 7px 22px;
  border:1px solid color-mix(in srgb,var(--bx5-accent) 38%,transparent) !important;
  border-radius:999px;
  background:color-mix(in srgb,var(--bx5-accent) 13%,#111a35) !important;
  color:color-mix(in srgb,var(--bx5-accent) 76%,#fff) !important;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
  font-size:.55rem;
  line-height:1;
  font-style:normal;
  font-weight:850;
}
body.bx4-home .bx5-evidence-spine .bx4-spine-track article em::before {
  content:"";
  position:absolute;
  left:9px;
  top:50%;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--bx5-accent);
  box-shadow:0 0 10px var(--bx5-accent);
  transform:translateY(-50%);
}

/* Evidence states + human authority */
body.bx4-home .bx5-evidence-spine .bx4-spine-bottom {
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.28fr);
  gap:18px;
  align-items:stretch;
  margin-top:24px;
}
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend,
body.bx4-home .bx5-evidence-spine .bx4-human-boundary {
  position:relative;
  min-height:160px;
  overflow:hidden;
  border:1px solid rgba(139,154,198,.17);
  border-radius:22px;
  background:linear-gradient(145deg,rgba(255,255,255,.045),rgba(255,255,255,.018));
  backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.025),0 15px 38px rgba(0,0,0,.09);
}
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend {
  display:flex;
  flex-wrap:wrap;
  align-content:flex-start;
  gap:8px;
  padding:20px 22px;
}
body.bx4-home .bx5-evidence-spine .bx5-legend-head {
  flex:1 0 100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding-bottom:15px;
  margin-bottom:4px;
  border-bottom:1px solid rgba(139,154,198,.14);
}
body.bx4-home .bx5-evidence-spine .bx5-legend-head small {
  color:#9b8cff;
  font:900 .57rem/1 ui-monospace,SFMono-Regular,Menlo,monospace;
  letter-spacing:.15em;
}
body.bx4-home .bx5-evidence-spine .bx5-legend-head span {
  padding:0;
  border:0;
  background:transparent;
  color:#7f8ca8;
  font-size:.59rem;
  font-style:italic;
  font-weight:650;
}
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span:not(.bx5-human-impact) {
  position:relative;
  padding:7px 10px 7px 23px;
  border:1px solid rgba(141,156,198,.16);
  border-radius:999px;
  background:rgba(255,255,255,.025);
  color:#c7d0e2;
  font-size:.58rem;
  font-weight:820;
}
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span::before {
  content:"";
  position:absolute;
  left:10px;
  top:50%;
  width:6px;
  height:6px;
  border-radius:50%;
  transform:translateY(-50%);
  box-shadow:0 0 9px currentColor;
}
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.retrieved { color:#83b8ff; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.retrieved::before { background:#65a6ff; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.predicted { color:#b59aff; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.predicted::before { background:#9b72ff; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.computed { color:#69ddea; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.computed::before { background:#31cee1; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.measured { color:#77e6bc; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.measured::before { background:#42e0a8; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.reviewed { color:#dce4f4; }
body.bx4-home .bx5-evidence-spine .bx4-evidence-legend > span.reviewed::before { background:#d6dff3; }
body.bx4-home .bx5-evidence-spine .bx4-human-boundary {
  display:grid;
  grid-template-columns:58px minmax(0,1fr) auto;
  gap:18px;
  align-items:center;
  padding:22px 24px;
  color:#f6f8ff;
  background:
    radial-gradient(circle at 86% 34%,rgba(101,77,255,.19),transparent 23rem),
    linear-gradient(145deg,rgba(18,28,61,.92),rgba(18,25,52,.78));
  border-color:rgba(117,93,255,.37);
}
body.bx4-home .bx5-evidence-spine .bx4-human-boundary::before {
  content:"";
  position:absolute;
  right:-40px;
  bottom:-54px;
  width:320px;
  height:170px;
  opacity:.24;
  background:
    repeating-radial-gradient(ellipse at 50% 100%,transparent 0 12px,rgba(104,88,255,.46) 13px 14px,transparent 15px 24px);
  transform:rotate(-8deg);
  pointer-events:none;
}
body.bx4-home .bx5-evidence-spine .bx4-human-boundary > span:first-child {
  position:relative;
  z-index:1;
  width:56px;
  height:56px;
  border:1px solid rgba(143,128,255,.38);
  border-radius:17px;
  background:linear-gradient(145deg,#6e58ff,#3325c8);
  color:#fff;
  box-shadow:0 12px 30px rgba(73,51,220,.28),inset 0 1px 0 rgba(255,255,255,.18);
  font-size:1rem;
}
body.bx4-home .bx5-evidence-spine .bx4-human-boundary > div {
  position:relative;
  z-index:1;
  display:grid;
  gap:6px;
}
body.bx4-home .bx5-evidence-spine .bx4-human-boundary small {
  color:#a493ff;
  font-size:.58rem;
  font-weight:900;
  letter-spacing:.14em;
}
body.bx4-home .bx5-evidence-spine .bx4-human-boundary strong {
  max-width:760px;
  color:#fff;
  font-size:1rem;
  line-height:1.35;
  letter-spacing:-.02em;
}
body.bx4-home .bx5-evidence-spine .bx4-human-boundary p {
  max-width:760px;
  margin:0;
  color:#9ba8c1;
  font-size:.69rem;
  line-height:1.55;
}
body.bx4-home .bx5-evidence-spine .bx5-human-impact {
  position:relative;
  z-index:1;
  align-self:center;
  max-width:110px;
  padding-left:16px;
  border-left:1px solid rgba(150,134,255,.38);
  color:#8677f6;
  font:850 .55rem/1.55 ui-monospace,SFMono-Regular,Menlo,monospace;
  letter-spacing:.12em;
  text-transform:uppercase;
}

/* Responsive evidence system */
@media (max-width:1280px) {
  body.bx4-home .bx4-spine.bx5-evidence-spine > .shell { width:min(1180px,calc(100% - 44px)); }
  body.bx4-home .bx5-evidence-spine .bx4-spine-head { grid-template-columns:1fr; gap:26px; }
  body.bx4-home .bx5-evidence-spine .bx5-spine-title { max-width:900px; }
  body.bx4-home .bx5-evidence-spine .bx5-spine-intro { max-width:900px; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track { grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-line { display:none; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track > article { min-height:218px; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track > article::after { display:none; }
}
@media (max-width:900px) {
  body.bx4-home .bx4-spine.bx5-evidence-spine > .shell { width:min(100% - 30px,840px); }
  body.bx4-home .bx5-evidence-spine .bx4-spine-head h2 { font-size:clamp(3.2rem,10vw,5rem); }
  body.bx4-home .bx5-evidence-spine .bx5-spine-intro { padding-left:24px; }
  body.bx4-home .bx5-evidence-spine .bx5-spine-principles { grid-template-columns:1fr; gap:4px; }
  body.bx4-home .bx5-evidence-spine .bx5-spine-principles > span { border-top:1px solid rgba(141,153,194,.14); }
  body.bx4-home .bx5-evidence-spine .bx4-spine-bottom { grid-template-columns:1fr; }
  body.bx4-home .bx5-evidence-spine .bx4-human-boundary { grid-template-columns:58px 1fr; }
  body.bx4-home .bx5-evidence-spine .bx5-human-impact { grid-column:1/-1; max-width:none; padding:14px 0 0; border-left:0; border-top:1px solid rgba(150,134,255,.22); }
}
@media (max-width:680px) {
  body.bx4-home .bx4-spine.bx5-evidence-spine { padding:78px 0 70px; }
  body.bx4-home .bx4-spine.bx5-evidence-spine > .shell { width:min(100% - 22px,620px); }
  body.bx4-home .bx5-evidence-spine .bx4-spine-head { margin-bottom:30px; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-head h2 { font-size:clamp(2.9rem,14vw,4.2rem); line-height:.91; }
  body.bx4-home .bx5-evidence-spine .bx5-spine-manifesto { font-size:.55rem; letter-spacing:.12em; }
  body.bx4-home .bx5-evidence-spine .bx5-spine-intro { padding-left:18px; }
  body.bx4-home .bx5-evidence-spine .bx5-spine-intro > p { font-size:.93rem; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track { display:grid; grid-template-columns:1fr; gap:9px; padding-top:6px; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track > article {
    min-height:0;
    display:grid;
    grid-template-columns:44px 36px minmax(0,1fr);
    grid-template-areas:"num icon copy" "state state state";
    gap:12px;
    align-items:center;
    padding:14px;
  }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track article > b { grid-area:num; margin:0; width:40px; height:40px; box-shadow:none; }
  body.bx4-home .bx5-evidence-spine .bx5-stage-icon { grid-area:icon; position:static; width:34px; height:34px; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track article > div { grid-area:copy; min-height:0; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track article em { grid-area:state; margin:0; }
  body.bx4-home .bx5-evidence-spine .bx4-evidence-legend { padding:18px; }
  body.bx4-home .bx5-evidence-spine .bx5-legend-head { display:grid; gap:7px; }
  body.bx4-home .bx5-evidence-spine .bx4-human-boundary { grid-template-columns:50px 1fr; padding:18px; }
  body.bx4-home .bx5-evidence-spine .bx4-human-boundary > span:first-child { width:48px; height:48px; }
}
@media (prefers-reduced-motion:reduce) {
  body.bx4-home .bx5-evidence-spine .bx4-spine-line::after { animation:none !important; display:none; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track > article { transition:none !important; }
  body.bx4-home .bx5-evidence-spine .bx4-spine-track > article:hover { transform:none; }
}