.dropbtn {

    background-color: #FF0000;

    color: white;

    padding: 16px;

    font-size: 16px;

    border: none;

    cursor: pointer;

   }   

   .dropdown {

    position: relative;
    z-indent:1;

    display: inline-block;

   }

   .dropdown-content {

    display: none;

    position: absolute;

    background-color: #f9f9f9;

    width: 100%;;

    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);

   } 

   .dropdown-content a {

    color: black;

    padding: 12px 16px;

    text-decoration: none;

    display: block;

   }   

   .dropdown-content a:hover {

    background-color: #f1f1f1

   }  

   .dropdown:hover .dropdown-content {

    display: block;

   }   

   .dropdown:hover .dropbtn {

    background-color: #3e8e41;

   }