ul.nav {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow:  visible;
    background-color: #282c34;
    position: fixed;
    width: 100%;
    z-index: 3;
    height: 47px;
    top: 0;
    border-bottom-color: #555555;
    border-bottom: 1px;
    border-bottom-style: solid;
    border-top-color: #555555;
    border-top: 1px;
    border-top-style: solid;
}
ul.nav li {
    float: left;
    top: 445px;
}
ul.nav li a {
    display: block;
    color: #afafaf;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    cursor: pointer;
    transition: 1s;
}
ul.nav li a:hover:not(.active) {
    background-color: #3d434e;
}
.active {
    background-color: #282c34;
}
li.drop button{
    background-color: #282c34;
    height: 47px;
    border: none;
    cursor: pointer;
    color: #afafaf;
    text-decoration: none;
    font-size: 17px;
    display: block;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    transition: 1s;
    width: 82px;
}
li.drop button:hover:not(.active){
    background-color: #3d434e;  
}
div.menu{
    overflow: hidden;
    position: absolute;
    width: 82px;
    z-index: 1;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    background-color: #282c34;
    height: 0px;
    transition: 1.5s;
    border-bottom-style: solid;
    border-bottom-width: 1px;
}
div.menu a{
    text-decoration: none;
    display: block;
}
li.drop:hover div.menu{
    display: block;
    height: 188px;
    transition: 1.2s;
}
li.drop{
    display: inline-block;
}