/* /research/simulate-before-reality/: the former homepage, reframed as the
   origin of MatrAIx research. Everything else comes from home.css. */
.nav-links a.active { color: var(--phos); }

.rx-subnav--home + .hero--split { padding-top: 56px; }
@media (min-width: 900px) {
  .rx-subnav--home + .hero--split { padding-top: 64px; }
}

.sbr-eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--phos);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
}

/* ---------- 01 · Where it started ---------- */
.origin-panel { max-width: 1160px; }
.origin-panel .sec-sub { max-width: 720px; margin: 0 auto; color: var(--ink-dim); }
.origin-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1fr);
  align-items: stretch;
  gap: 14px;
}
.origin-card {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: var(--bg-2);
}
.origin-sim {
  border-color: rgba(74, 143, 194, 0.45);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(74, 143, 194, 0.16), transparent 60%),
    var(--bg-2);
}
.origin-tag {
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
}
.origin-sim .origin-tag { color: var(--phos); }
.origin-card h3 {
  margin: 14px 0 20px;
  font-family: var(--disp);
  font-size: clamp(1.25rem, 2.2vw, 1.55rem);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.origin-steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: origin;
}
.origin-steps li {
  position: relative;
  padding-left: 38px;
  color: var(--ink-dim);
  font-size: 0.98rem;
  line-height: 1.55;
  counter-increment: origin;
}
.origin-steps li::before {
  content: counter(origin, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.72rem;
  opacity: 0.7;
}
.origin-sim .origin-steps li::before { color: var(--phos); opacity: 1; }
.origin-steps b { color: var(--ink); font-weight: 500; }
.origin-arrow {
  display: grid;
  place-items: center;
  color: var(--phos);
  font-size: 1.4rem;
}
.origin-note {
  max-width: 820px;
  margin: 34px auto 0;
  color: var(--ink-dim);
  font-size: 1.02rem;
  line-height: 1.65;
  text-align: center;
}
.origin-note em { color: var(--ink); font-style: italic; }
.origin-note a { color: var(--phos); text-decoration: none; border-bottom: 1px solid rgba(74, 143, 194, 0.4); }
.origin-note a:hover { border-bottom-color: var(--phos); }

@media (max-width: 860px) {
  .origin-compare { grid-template-columns: 1fr; }
  .origin-arrow { height: 28px; }
  .origin-arrow span { display: inline-block; transform: rotate(90deg); }
}