.level0 a{
        display: block;    
        text-decoration: none;
        color: rgb(0, 0, 0); 
        padding: 10px 0;   
        display: block;
   
   }
   .level0 li{
         list-style: none;
         text-decoration: none;
         
   }
   .level0  li :hover {
       display: block;
       cursor: pointer;
       position: relative;
       background-color: rgb(31, 22, 163);
       color: azure;
      }
   .level0{
       margin: 10px 10px 10px 10px;
       padding: 40px 40px;
       width: 300px; 
       border: 2px solid gray;       
   }
   
   #lev :hover {
       position: relative;
       display: block;
       transition: all 0.4s ease;
       
   }
   .level0 :hover {
       cursor: pointer;
       position: relative;
       padding-left: 5px; 
   }