I tried to change many times my custom css but nothing works as expected.
When I open the site (http:\www.dragoblu.com) in my phone, if I press the menu button I get a vertical list of all the items in the menu, but I would like to get a collapsing vertical menu (simply transform the horizontal menu to vertical keeping submenus).
How can i do it ?
You cannot do this only with CSS. You can hide the sub-menus with CSS but you’re going to need some js to expand them when clicked. I actually have something like this planned for a future version.