.cabecera {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding: 14px 20px;
  margin: -20px -20px 0;
  background: linear-gradient(90deg, var(--rosa), var(--violeta));
  color: var(--blanco);
  box-shadow: 0 4px 20px rgba(123, 63, 228, 0.25);
}

.cabecera .logo {
  margin: 0;
  font-size: 1.6rem;
  color: var(--blanco);
}

.zona-usuario {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.saludo {
  font-weight: bold;
}

.enlace-nav {
  color: var(--blanco);
  font-weight: bold;
  text-decoration: none;
}

.enlace-nav:hover {
  text-decoration: underline;
}

.boton-nav {
  display: inline-block;
  padding: 8px 16px;
  border: 2px solid var(--blanco);
  border-radius: 999px;
  background: transparent;
  color: var(--blanco);
  font-size: 14px;
  font-weight: bold;
  text-decoration: none;
  cursor: pointer;
}

.boton-nav:hover {
  background: var(--blanco);
  color: var(--violeta);
}