/*
 * NEXONOMY · PLATFORM PAGE COMPONENTS
 * The Decision Intelligence Core architecture diagram (the locked 4-layer Core,
 * wrapped by Governance and Learning, threaded by the Decision Record).
 * Platform-only. Reuses tokens and the shared system. Import after product.css.
 */


/* ─── THE CORE ARCHITECTURE ──────────────────────────────────────────────── */

.core {
  border: 1px solid var(--color-border);
  border-radius: 14px;
  overflow: hidden;
  background:
    radial-gradient(90% 80% at 18% 0%, #15131d 0%, var(--color-surface-0) 70%);
  box-shadow:
    0 40px 80px -32px rgba(0,0,0,0.80),
    0 8px 24px -12px rgba(0,0,0,0.60);
}

/* Governance / Learning wrap bands */
.core__band {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
}
.core__band .icon { width: 14px; height: 14px; color: var(--color-accent); }
.core__band b { color: var(--color-text-secondary); font-weight: var(--weight-normal); }
.core__band--gov { border-bottom: 1px solid var(--color-border); }
.core__band--learn { border-top: 1px solid var(--color-border); justify-content: space-between; }
.core__loop {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--color-accent);
}

.core__body { display: flex; }

/* The Decision Record spine threading down the left of every layer */
.core__spine {
  position: relative;
  flex-shrink: 0;
  width: 52px;
  border-right: 1px solid var(--color-border);
  background: rgba(140,101,247,0.04);
  display: flex;
  align-items: center;
  justify-content: center;
}
.core__spine::before {
  content: '';
  position: absolute;
  left: 50%; top: 18px; bottom: 18px;
  width: 2px;
  background: var(--color-accent);
  transform: translateX(-50%);
}
.core__spine span {
  position: relative;
  z-index: 1;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-surface-0);
  padding: 10px 0;
}

.core__stack { flex: 1; min-width: 0; }
.core-layer {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px 22px;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--duration-fast) var(--ease-out);
}
.core-layer:last-child { border-bottom: none; }
.core-layer:hover { background: rgba(255,255,255,0.015); }

.core-layer__icon {
  width: 38px; height: 38px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: rgba(140,101,247,0.10);
  border: 1px solid rgba(140,101,247,0.22);
  color: var(--color-accent);
}
.core-layer__icon .icon { width: 19px; height: 19px; }
.core-layer__n {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.10em;
  color: var(--color-text-muted);
  margin-bottom: 5px;
}
.core-layer__name {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: -0.4px;
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: 5px;
}
.core-layer__desc { font-size: 13.5px; line-height: 20px; color: var(--color-text-secondary); }
.core-layer__adds {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.core-layer__adds::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
}


/* ─── PLATFORM SECTION HELPERS ───────────────────────────────────────────── */

.plat-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.plat-copy__heading {
  font-family: var(--font-display);
  font-size: 38px;
  line-height: 1.12;
  letter-spacing: -1.2px;
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: 18px;
}
.plat-copy__heading em { font-style: italic; color: var(--color-accent); }
.plat-copy p { font-size: 15px; line-height: 24px; color: var(--color-text-secondary); margin-bottom: 14px; }
.plat-copy p b { color: var(--color-text-primary); font-weight: var(--weight-medium); }


/* ─── PLATFORM HERO ──────────────────────────────────────────────────────── */

.platform-hero {
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 150px var(--section-px) 40px;
}
.platform-hero__h {
  font-family: var(--font-display);
  font-size: 56px;
  line-height: 1.06;
  letter-spacing: -2.5px;
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  max-width: 760px;
}
.platform-hero__h em { font-style: italic; color: var(--color-accent); }
.platform-hero__sub {
  margin-top: 20px;
  font-size: 17px;
  line-height: 27px;
  letter-spacing: -0.3px;
  color: var(--color-text-secondary);
  max-width: 640px;
}
.platform-hero__sub b { color: var(--color-text-primary); font-weight: var(--weight-medium); }
.platform-hero__actions { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }


/* ─── RESPONSIVE ─────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .platform-hero { padding-top: 120px; }
  .platform-hero__h { font-size: 38px; letter-spacing: -1.5px; }
  .core__spine { width: 36px; }
  .core__spine span { font-size: 8px; letter-spacing: 0.10em; }
  .core-layer { padding: 16px; }
  .plat-split { grid-template-columns: 1fr; gap: 32px; }
  .plat-copy__heading { font-size: 28px; }
}