.icona {
    width: 35px;
    height: 5px;
    background-color: white;
    margin: 6px 0;
    position: relative;
    cursor: pointer;


   -webkit-transition: background-color;
    -webkit-transition-duration: 0.5s;
    -webkit-transition-timing-function: ease-in;



   -moz-transition: background-color;
    -moz-transition-duration: 0.5s;
    -moz-transition-timing-function: ease-in;



   -ms-transition: background-color;
    -ms-transition-duration: 0.5s;
    -ms-transition-timing-function: ease-in;



   -o-transition: background-color;
    -o-transition-duration: 0.5s;
    -o-transition-timing-function: ease-in;
   }



   .header{
    position: relative;
    width: 5%;
    height: 3%;
    background: fixed no-repeat center;
    background-size: cover;
    background-image: url("res/background.jpg");
    }



   .trasparenza{
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: grey;
    opacity: 0.6;
    -webkit-transition: opacity;
    -webkit-transition-duration: 1.5s ;
    -webkit-transition-timing-function: easy-in;
    -moz-transition: opacity;
    -moz-transition-duration: 1.5s ;
    -moz-transition-timing-function: easy-in;
    -ms-transition: opacity;
    -ms-transition-duration: 1.5s ;
    -ms-transition-timing-function: easy-in;
    -o-transition: opacity;
    -o-transition-duration: 1.5s ;
    -o-transition-timing-function: easy-in;
    }



   .trasparenza:hover{
    opacity: 0.4;
    }



   .container{
    position: absolute;
    top: 5%;
    left: 5%;
    border-radius: 100%;
    padding:1%;
    width:35px;
    -webkit-transition: border-color,border-radius,padding,margin;
    -webkit-transition-duration: 0.5s,1s,1s,1s;
    -webkit-transition-timing-function: ease-out;
    -moz-transition: border-color,border-radius,padding,margin;
    -moz-transition-duration: 0.5s,1s,1s,1s;
    -moz-transition-timing-function: ease-out;
    -ms-transition: border-color,border-radius,padding,margin;
    -ms-transition-duration: 0.5s,1s,1s,1s;
    -ms-transition-timing-function: ease-out;
    -o-transition: border-color,border-radius,padding,margin;
    -o-transition-duration: 0.5s,1s,1s,1s;
    -o-transition-timing-function: ease-out;
   }



   .container:hover{
    margin-top: 0.5%;
    margin-left: 0.5%;
    border-radius:5%;
    border-color:rgb(255, 255, 255);
    padding:0.5%;
   }



   .container:hover .icona{
    background-color:white;
   }



   .overlay {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0, 0.9);
    overflow-x: hidden;
    transition: 0.5s;
   }



   .overlay-content {
    position: relative;
    top: 5%;
    width: 50%;
    text-align: left;
    margin-top: 30px;
    margin-left: -30px;
    float: left;
   }



   .overlay a {
    padding: 8px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
    transition: 0.3s;
   }
#astri{
    text-decoration: none;
}


   .overlay a:hover, .overlay a:focus {
    color: #f1f1f1;
   }



   .overlay .closebtn {
    position: absolute;
    top: 8px;
    left: 210px;
    font-size: 40px;
	  color:white;
   }



   @media screen and (max-height: 450px) {
    .overlay a {font-size: 20px}
    .overlay .closebtn {
    font-size: 40px;
    top: 15px;
    right: 35px;
    }
   }

ul{
    margin-left:10px;
    margin-right:auto;
}

   .titolo {
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    font-size: 48px;
   }
   
   #license{
   font-size:20px;
   color:grey;
    text-decoration: none;
   }