.user-dropdown {
    position: absolute;
    right: 0;
    top: 100%;
    z-index: 1000;
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.15);
    width: 160px;
    text-align: left;
}