/* V51 — separate homepage discovery from product-page conversion. */

.home-problem-section {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 78% 15%, rgba(91, 132, 255, .075), transparent 31%),
    linear-gradient(180deg, #080a0d, #0a0d11);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 46px;
  border-top: 1px solid var(--border-strong);
  border-left: 1px solid var(--border);
}

.problem-grid article {
  min-height: 300px;
  padding: 34px 32px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(12, 15, 20, .72);
}

.problem-grid span,
.home-product-bridge span,
.decision-chain-grid article > span {
  color: var(--blue);
  font: 700 10px/1.4 ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: .1em;
}

.problem-grid h3 {
  max-width: 340px;
  margin-top: 56px;
  color: var(--text);
  font-size: clamp(19px, 1.6vw, 24px);
  line-height: 1.45;
  letter-spacing: -.025em;
}

.problem-grid p {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.82;
}

.home-product-bridge {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 48px;
  margin-top: 24px;
  padding: 34px 36px;
  border: 1px solid rgba(91, 132, 255, .23);
  background: linear-gradient(110deg, rgba(91, 132, 255, .075), rgba(13, 17, 23, .62));
}

.home-product-bridge h3 {
  margin-top: 12px;
  color: var(--text);
  font-size: clamp(22px, 2vw, 30px);
  line-height: 1.35;
}

.home-product-bridge p {
  max-width: 780px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.page-indicator .product-hero {
  min-height: 720px;
}

.decision-chain {
  border-block: 1px solid var(--border);
  background: #090c10;
}

.decision-chain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 46px;
  border-top: 1px solid var(--border-strong);
  border-left: 1px solid var(--border);
}

.decision-chain-grid article {
  position: relative;
  min-height: 390px;
  padding: 32px 30px 34px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(17, 22, 30, .88), rgba(10, 13, 18, .72));
}

.decision-chain-grid article > b {
  display: block;
  margin-top: 34px;
  color: #d5ba80;
  font-size: 12px;
  letter-spacing: .06em;
}

.decision-chain-grid h3 {
  margin-top: 16px;
  color: var(--text);
  font-size: clamp(20px, 1.7vw, 26px);
  line-height: 1.4;
  letter-spacing: -.03em;
}

.decision-chain-grid p {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.decision-chain-grid em {
  position: absolute;
  right: 30px;
  bottom: 28px;
  left: 30px;
  padding-top: 15px;
  border-top: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 12px;
  font-style: normal;
}

.chain-principle {
  display: grid;
  grid-template-columns: minmax(240px, .55fr) 1.45fr;
  gap: 48px;
  margin-top: 22px;
  padding: 28px 30px;
  border-left: 2px solid var(--blue);
  background: rgba(91, 132, 255, .05);
}

.chain-principle strong { color: var(--text); font-size: 17px; }
.chain-principle p { color: var(--muted); font-size: 13px; line-height: 1.8; }

.delivery-section {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0b0e13, #080a0d);
}

.delivery-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 42px;
  border-top: 1px solid var(--border-strong);
  border-left: 1px solid var(--border);
}

.delivery-steps li {
  min-height: 240px;
  padding: 28px 26px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.delivery-steps span { color: var(--blue); font: 700 11px/1 ui-monospace, monospace; }
.delivery-steps b { display: block; margin-top: 42px; color: var(--text); font-size: 16px; }
.delivery-steps p { margin-top: 14px; color: var(--muted); font-size: 12px; line-height: 1.78; }
.delivery-section .delivery-assurance { margin-top: 22px; }
.delivery-section .version-ledger { margin-top: 22px; }

@media (max-width: 960px) {
  .problem-grid,
  .decision-chain-grid { grid-template-columns: 1fr; }
  .problem-grid article { min-height: 0; }
  .problem-grid h3 { margin-top: 30px; }
  .decision-chain-grid article { min-height: 330px; }
  .delivery-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .home-product-bridge,
  .chain-principle { grid-template-columns: 1fr; gap: 24px; }
  .home-product-bridge { align-items: start; padding: 28px 24px; }
  .home-product-bridge .button { width: 100%; justify-content: center; }
  .problem-grid article { padding: 28px 24px; }
  .decision-chain-grid article { min-height: 350px; padding: 28px 24px; }
  .decision-chain-grid em { right: 24px; left: 24px; }
  .delivery-steps { grid-template-columns: 1fr; }
  .delivery-steps li { min-height: 0; }
  .delivery-steps b { margin-top: 26px; }
}