I have added a newsletter static block to my website footer, but as you can see from the image below the 'subscribe' button has been pushed down a line and it should appear at the end of the email input field. It's as if the area of the footer where I have placed the static block is too narrow. What file do I need to edit to increase the width of the cell, container or whatever it is called to make it wide enough to accommodate the newsletter static block?
This is the look below I am trying to achieve
You can edit the element size in CSS. Also, make sure that the box will look good on all pages.
If you want to change CSS files you need to have an access to the file system. Click the right button of your mouse on the element and choose "inspect element" (most of browsers have such a directory in the menu or something similar) . In the right corner you will have a window, where you have different CSS styles, which are actual for this element and path to this CSS file.