Replicating an old site

Hi, I’m trying to replicate a site that I made on Freeway about two years ago –

I know I won’t do it precisely but I’m also running into several snags (see screen grab).

1 I want the menu dots on all devices but how do I raise them so they are centred in the white strip? I’ve played around with the padding and set up a class but I still cannot work it out.
2 I cannot get the boxes to stay near the top of the page in the browser. Instead they fall to the bottom: which is the control that governs this, please?
3 Is there a way to alter the opacity of the boxes, as on my original site?

Many thanks in advance.