.user-box {
    position: relative;
    margin-right: 15px;
    z-index: 999;
}
.user-box img {
    height: auto;
    width: 2.1rem;
}
.user-dropdown {
    position: absolute;
    right: 0;
    width: 240px;
    background: #fff;
    box-shadow: 0 0 10px #ddd;
    border-radius: 5px;
    top: 35px;
    display: none;
}
.user-dropdown ul {
    list-style: none;
    margin: 0;
    padding: 10px;
    position: relative;
}

.user-dropdown ul:before {
    position: absolute;
    width: 30px;
    height: 30px;
    background: #ffffff;
    top: -5px;
    right: 11px;
    z-index: -1;
    content: "";
    transform: rotate(45deg);
    box-shadow: 0 0 10px #ddd;
}
.user-box:hover .user-dropdown  {
display: block;
}