.nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  padding-block: var(--sp-2);
  transition: background var(--transition), box-shadow var(--transition),
              padding var(--transition);
}

/* Estado al hacer scroll: fondo sólido con blur */
.nav.scrolled {
  background: rgba(27, 37, 40, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  padding-block: var(--sp-1);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.nav-logo img {
  height: 42px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.nav-links a {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover {
  color: var(--text-heading);
}

/* Indicador de página activa */
.nav-links a.active {
  color: var(--text-heading);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-cta {
  margin-left: var(--sp-2);
  color: white;
}

/* ── Hamburguesa (oculta en desktop) ── */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-1);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-heading);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ── Mobile ── */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
    z-index: 101;
  }

  .nav-links {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: var(--charcoal);
    /* Capa de atmósfera propia del menú */
    background-image: radial-gradient(
      ellipse 500px 400px at 90% 10%,
      rgba(77, 163, 255, 0.10), transparent 65%
    );
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 0;
    padding: var(--sp-5) var(--sp-4);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.76, 0, 0.24, 1);
  }

  .nav-links.open {
    transform: translateX(0);
  }

  /* Links grandes estilo editorial */
  .nav-links a:not(.nav-cta) {
    font-family: var(--font-heading);
    font-size: clamp(1.7rem, 7vw, 2.2rem);
    font-weight: 600;
    color: var(--text-heading);
    padding-block: 0.55rem;
    counter-increment: navitem;
    display: flex;
    align-items: baseline;
    gap: 0.8rem;
    /* Estado inicial para la cascada */
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.25s ease;
  }

  /* Numeración 01, 02, 03... */
  .nav-links {
    counter-reset: navitem;
  }

  .nav-links a:not(.nav-cta)::before {
    content: '0' counter(navitem);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--glow);
    letter-spacing: 0.1em;
  }

  /* Página activa */
  .nav-links a.active {
    color: var(--glow);
  }

  .nav-links a.active::after {
    display: none; /* la rayita de desktop no aplica aquí */
  }

  /* Cascada al abrir: cada link entra con retardo progresivo */
  .nav-links.open a:not(.nav-cta) {
    opacity: 1;
    transform: translateY(0);
  }

  .nav-links.open a:nth-child(1) { transition-delay: 0.10s; }
  .nav-links.open a:nth-child(2) { transition-delay: 0.16s; }
  .nav-links.open a:nth-child(3) { transition-delay: 0.22s; }
  .nav-links.open a:nth-child(4) { transition-delay: 0.28s; }
  .nav-links.open a:nth-child(5) { transition-delay: 0.34s; }
  .nav-links.open a:nth-child(6) { transition-delay: 0.40s; }

  /* CTA anclado abajo, ancho completo */
  .nav-links .nav-cta {
    margin-top: auto;
    margin-left: 0;
    align-self: stretch;
    justify-content: center;
    font-size: 1rem;
    padding: 1rem;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.4s 0.46s ease, transform 0.4s 0.46s ease;
  }

  .nav-links.open .nav-cta {
    opacity: 1;
    transform: translateY(0);
  }

  /* Hamburguesa → X (igual que antes) */
  .nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}