How to make Dropdown Items uppercase on Desktop and Lowercase on Mobile

To make Dropdown items uppercase on Desktop and Lowercase on Mobile, you can use this CSS code to Website Tools > Custom CSS.
First, this code will make Dropdown to Uppercase on Desktop

div.header-nav-folder-item a {
    text-transform: uppercase;
}

Next, this code will make Dropdown to Lowercase on Mobile

div.header-menu-controls ~ div * {
    text-transform: lowercase;
}