.mtable {
         position:relative;
         margin:auto;
         top:50px;
         left:20%;
         width:50%;
         /*border: 1px solid black;*/
   }


   table { 
           width:80%;
           border-collapse:collapse;
           }


   th,td {
             padding: 12px;
             text-align:center;
          }

      th {
         background-color:yellow;
         }

     th:hover {
         background-color:magenta;
         }

     td:hover {
                font-size:2em;
                }
       tr:nth-child(odd) {
       background-color:pink;
       }
       tr:nth-child(even) {
       background-color:pink;
       }