.sidenav {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 9000;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 50px;
}

.sidenav a {
    padding: 8px 8px 8px 22px;
    text-decoration: none;
    font-family:verdana;
    font-size: 16px;
    color: white;
    display: block;
    transition: 0.3s;
    z-index: 9000;
}

.sidenav a:hover, .offcanvas a:focus{
    color: red;
}

.closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px !important;
    margin-left: 45px;
}

@media screen and (max-height: 450px) {
  .sidenav {padding-top: 15px;}
  .sidenav a {font-size: 18px;}
}


button.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 10%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
}

button.accordion.active, button.accordion:hover {
    background-color: #ddd;
}

button.accordion:after {
    content: '\02795';
    font-size: 13px;
    color: #777;
    float: right;
    margin-left: 5px;
}

button.accordion.active:after {
    content: "\2796";
}

div.panel {
    padding: 0 18px;
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: 0.6s ease-in-out;
    opacity: 0;
}

div.panel.show {
    opacity: 0;
    max-height: 500px;  
}
/* --------------------------------------------------------------------------------------- */
/* -------- rotazione immagine al passaggio del mouse ------------------------------------ */
/* --------------------------------------------------------------------------------------- */
.rotazione {
-webkit-transition-duration: 1s;
-moz-transition-duration: 1s;
-o-transition-duration: 1s;
transition-duration: 1s;
-webkit-transition-property: -webkit-transform;
-moz-transition-property: -moz-transform;
-o-transition-property: -o-transform;
transition-property: transform;
overflow:hidden;
} 
.rotazione:hover {
-webkit-transform:rotate(360deg);
-moz-transform:rotate(360deg);
-o-transform:rotate(360deg);
}