form{
  background-color: black;
  color:#C0C0C0;
  margin:0;
  padding: 15px;
}
#materiales{
  margin-bottom: 10px;
}
form p{
  margin-top:0;
}
.princiForm{
  display:block;
}
#ordena select{
  font-size: 14px;
  height: 30px;
  padding: 5px;
  border-radius: 8px;
  background-color: white;
}


@media (min-width : 720px){
  form{
      height: 100px;
      padding:0 20px 0 20px;
  }
  #parrafo{
    margin-top:16px;
  }
  .princiForm{
      display:flex;
  }
  #materiales{
    float:left;
  }
  #ordena{
    padding-top:35px;
    float: right;
  }
  #ordena select{
    font-size: 14px;
    height: 30px;
    padding: 5px;
    width: 210px;
    border-radius: 8px;
  }
}