*[data-dropdown-content]
{
    display: none;
    background: #fff;
    border: 1px solid #ccc;
    min-width: 160px;
    padding: 0.25rem;
}

*[data-dropdown-content].dropdown-open
{
    display: block;
}

[data-dropdown-content] ul, li
{
    margin: 0;
    padding: 0;
    list-style-type: none;
}