/* ==========================================================================
   Barra de navegación
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(4, 19, 45, 0.82);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid rgba(28, 58, 102, 0.6);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 68px;
}

/* --- Marca ---------------------------------------------------------------- */

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-right: auto;
  color: var(--cyan);
}

/* La marca original tiene bastante detalle (dos tarjetas y la mano): necesita
   algo más de tamaño que un isotipo plano para leerse. */
.brand-mark {
  width: 40px;
  height: 40px;
  flex: none;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--on-dark);
}

/* La marca ya viene con esa mayúscula: el cian la subraya, no la inventa. */
.brand-name b {
  color: var(--cyan);
  font-weight: 800;
}

/* --- Enlaces -------------------------------------------------------------- */

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-links a {
  display: block;
  padding: 0.55rem 0.9rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--on-dark-muted);
  border-radius: var(--r-pill);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-links a:hover {
  color: var(--on-dark);
  background-color: rgba(28, 58, 102, 0.5);
}

.nav-links a[aria-current="page"] {
  color: var(--on-dark);
}

.nav-cta {
  padding: 0.65rem 1.25rem;
  font-size: 0.9375rem;
}

/* --- Botón de menú (solo en pantallas chicas) ----------------------------- */

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--on-dark);
  background: none;
  border: 1px solid var(--ink-600);
  border-radius: var(--r-md);
  cursor: pointer;
}

@media (max-width: 860px) {
  .nav {
    flex-wrap: wrap;
    min-height: 60px;
    padding-block: 0.5rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    order: 3;
    /* Cerrado por defecto; se abre con el atributo del botón. */
    display: none;
    padding-block: 0.5rem 1rem;
    border-top: 1px solid var(--ink-600);
    margin-top: 0.5rem;
  }

  .nav-links a {
    padding: 0.85rem 0.5rem;
    font-size: 1rem;
    border-radius: var(--r-sm);
  }

  .nav-cta {
    order: 2;
  }

  .site-header[data-open="true"] .nav-links {
    display: flex;
  }
}

@media (max-width: 460px) {
  .nav-cta {
    display: none;
  }

  .brand-name {
    font-size: 1.15rem;
  }
}