body {
  height: 100vh;
 background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../../imagenes/fondo-res.jpg');

  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  display: flex;
  justify-content: center;
  align-items: center;
}

.ui-jqgrid {
  font-size: 13px;
  overflow: hidden;
}
.ui-jqgrid .ui-jqgrid-bdiv {
  position: relative;
  overflow: auto;
}
.ui-jqgrid .ui-jqgrid-hdiv {
  position: relative;
  overflow: hidden;
}
.ui-jqgrid .ui-jqgrid-pager {
  position: relative;
  overflow: hidden;
}