How to make the border not to the end?

Question

Layout

hobotrobots.devshift.co.uk

Answer 1

If you're interested in how the specific example you linked is implemented, right-click and select "inspect element" to view element styles.
In general, this effect can be obtained by placing elements with a border inside another element with a background and somehow creating an indent between them. For example, using padding or rigidly setting sizes and positioning.