/* ── Shared nav bar — used by index.html and demos/metrics.html ── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  background: rgba(250,250,249,0.95);
  border-bottom: 1px solid #e7e5e4;
}
.site-nav-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-nav-brand {
  text-decoration: none;
  display: flex;
  align-items: center;
}
.site-nav-brand img {
  height: 32px;
}
.site-nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.site-nav-link {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: #78716c;
  text-decoration: none;
  transition: color 150ms;
}
.site-nav-link:hover {
  color: #1c1917;
}
.site-nav-link.active {
  color: #1c1917;
}
.site-nav-cta {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: white;
  background: #f97316;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: background 150ms;
}
.site-nav-cta:hover {
  background: #ea580c;
}
.site-nav-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.site-nav-user img {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 9999px;
}
.site-nav-user span {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 0.875rem;
  color: #57534e;
  font-weight: 500;
}
.site-nav-user button {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 0.875rem;
  color: #a8a29e;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 150ms;
}
.site-nav-user button:hover {
  color: #78716c;
}

/* Hamburger — hidden on desktop */
.site-nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: #57534e;
  padding: 0.25rem;
}

/* Mobile dropdown */
.site-nav-mobile {
  display: none;
}
.site-nav-mobile-link {
  display: block;
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1rem;
  font-weight: 500;
  color: #57534e;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-top: 1px solid #e7e5e4;
  transition: background 150ms, color 150ms;
}
.site-nav-mobile-link:hover {
  background: #fafaf9;
  color: #1c1917;
}
.site-nav-mobile-cta {
  color: #f97316;
  font-weight: 600;
}

@media (max-width: 768px) {
  .site-nav-links {
    display: none;
  }
  .site-nav-hamburger {
    display: block;
  }
  .site-nav-mobile {
    display: block;
    background: rgba(250,250,249,0.98);
    border-bottom: 1px solid #e7e5e4;
  }
}