#btn-menu{
    display: none;
} 

@media screen and ( max-width: 1100px ){
   #btn-menu{
       display: block;
   } 
}

.sidenav {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: rgb(110, 211, 74);
    background-image: linear-gradient(rgba(110, 211, 74,1),
                                  rgba(252, 183, 39,1),
                                  rgba(245, 130, 31,1),
                                  rgba(224, 58, 61,1),
                                  rgba(150, 61, 150,1),
                                  rgba(0, 157, 220,1)
                                  
                                  
                                  );
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
  }
  
  .sidenav a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #ffffff;
    display: block;
    transition: 0.3s;
  }
  
  .sidenav a:hover {
    color: #e0e0e0;
  }
  
  .sidenav .closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
    margin-left: 50px;
  }
  
  #main {
    transition: margin-left .5s;
    padding: 16px;
  }
  
  @media screen and (max-height: 450px) {
    .sidenav {padding-top: 15px;}
    .sidenav a {font-size: 18px;}
  }