.boton-firmaAvisoPMC {
  display: inline-block;
  width: 70px;
  height: 70px;
  background-image: url('../img/botones/FirmaDocumentoAvisoyPMC.ico'); 
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
}

.boton-AdjuntarDocVentas {
  display: inline-block;
  width: 70px;
  height: 70px;
  background-image: url('../img/botones/AdjuntarDocumentosVentas.ico'); 
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
}