.celtabl {
 visibility:hidden;
 position:absolute;
}
.codsig {
 visibility: hidden;
 position: absolute;
}
 @media only screen and (max-width : 420px) {
 .celtabl {
 visibility: visible;
 position: relative;
 }

 .celtabltr {
   border-collapse: collapse;
   border-color: #FFF;
   background-color: #154360;
   color: #FFF;
 }

 .codsig {
 visibility: visible;
 position: relative;
 font-weight: bold;
 text-decoration: underline;
 }

 .celtablth {
   border: 1px solid black;
   border-collapse: collapse;
   border-color: #FFF;
   background-color: #154360;
   color: #FFF;
   text-align: center;
 }

 .table{
   visibility: hidden;
   position: absolute;
 }
}