Hello How modify margins of post for a phone ? See the attach file. Thanks

I would like to make my www.aljowijnands.nl work on phones, I tried but failed, do you have a tutorial for this? How do I make that two columns which are next to each other in desktop, laptop and...

Hello I have trouble with my vertical menu in phone and tablet display. When I click on the Menu Button, the menu shows but behind other objetcs and so it can not be really seen. How can you make...