/* ═══════════════════════════════════════════════════════════
   Navegación fixed con backdrop-blur
   ═══════════════════════════════════════════════════════════ */
.site-header {
  position: relative;
  z-index: 100;
}

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.25rem 3rem;
  background: rgba(233, 238, 247, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--heading);
  letter-spacing: -0.02em;
}
.logo span { color: var(--orange); }

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  color: var(--body);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--orange); }

.btn-nav {
  background: var(--base);
  border: none;
  padding: 0.7rem 1.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow-out-sm);
  color: var(--heading);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.btn-nav:hover { transform: translateY(-2px); }
.btn-nav:active { box-shadow: var(--shadow-in); transform: translateY(0); }