.banda {
  bottom: 0px;
  display: table;
  background-color: red;
  position: fixed;
  color: white;
  height: 40px;
  width: 100%;
  font-size: 1.3em;
  z-index: 999;
}
.celda_banda {
  margin-right: auto;
  text-align: center;
  display: table-cell;
  vertical-align: middle;
  margin-left: auto;
}
body {
  padding-bottom: 40px ! important;
}