/* ── Alertas (agregadas al estilos.css existente) ── */
.alerta {
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 14px;
    font-size: 0.88rem;
    font-weight: 500;
}
.alerta-error { background: #fdecea; color: #c0392b; border-left: 4px solid #c0392b; }
.alerta-ok    { background: #eafaf1; color: #1e8449; border-left: 4px solid #27ae60; }