.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(13, 13, 13, 0.9);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.brand {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-size: 0.95rem;
}

.nav-highlight {
  margin-left: 0.5rem;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: clamp(2.4rem, 8vw, 5rem);
  margin-bottom: 0.6rem;
}

.hero p {
  max-width: 650px;
  font-size: 1.15rem;
}

.cta-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 0.5rem;
  padding: 1.2rem;
}

.diagram-placeholder {
  border: 1px dashed var(--accent);
  background: #101010;
  border-radius: 0.5rem;
  min-height: 280px;
  display: grid;
  place-items: center;
  color: var(--text-secondary);
  text-align: center;
  padding: 1.2rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.2rem 0;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.page-hero {
  padding: 5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
}

@media (max-width: 768px) {
  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
    padding-block: 0.75rem;
  }

  .nav-highlight {
    margin-left: 0;
  }
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.metrics-container {
  gap: 1.2rem;
}

.metric-card {
  background: #ffffff;
  color: #111;
  border-radius: 0.6rem;
  padding: 1.6rem 1rem;
  text-align: center;
}

.metric-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.metric-label {
  font-size: 0.9rem;
  color: #444;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}