Hi,
This is tricky being that Dante and Joyn are different themes, there will be small discrepancies between both.
1) Could you be more specific as to what you want? Ex: cons before the menu links? Or the visual aspect, lighter borders ect?
2) This is controlled with an CSS position, ex:
.full-center nav li.menu-item.sf-mega-menu>ul.sub-menu, .full-center .ajax-search-wrap {
top: 50px!important;
}
3) If you have enabled the Mega Menu, you can insert custom HTML into a menu item “Custom HTML Column (within Mega Menu)”.
If you have a mockup available or wireframe, I can try and help more specifically.
Thanks,
David.