/* ── Navbar ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background var(--transition-mid);
}
nav .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.logo {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.logo span { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin-left: auto;
}
.nav-links a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}
.nav-links a:hover { color: var(--white); }

.btn-nav {
  flex-shrink: 0;
  background: var(--accent);
  color: var(--white);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  transition: background var(--transition-fast);
}
.btn-nav:hover { background: var(--accent-dark); }

@media (max-width: 640px) {
  .nav-links { display: none; }
  nav .inner { gap: 1rem; }
  .btn-nav { font-size: 0.8rem; padding: 0.45rem 1rem; }
}