/* ============================================
   NAV — barra superior sticky con logo y enlaces
   ============================================ */

nav {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-brand-135);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 14px;
  color: #fff;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--cyan);
}

/* ----- Selector de idioma ----- */
.lang-switcher {
  display: flex;
  gap: 0.25rem;
}
.lang-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.lang-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
.lang-btn.active {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(6, 182, 212, 0.1);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-right {
    gap: 0;
  }
}