Adjust margins and padding for better readability

[riyadh-h]

What is the purpose of this pull request?

• Documentation update
• Bug fix
• Feature addition or enhancement
• Code maintenance
• Others, please explain: CSS styling adjustments.

Resolves parts of #1669

Overview of changes:
A few adjustments to margins and padding of different elements and classes in CSS for better readability.

Anything you'd like to highlight / discuss:

• Some adjustments (shrinking of .indented, .box-body-wrapper, and .contents padding) target mobile devices; hence why they are inside media queries.
• Screenshots that show the results of these adjustments are available in this comment and this one (the first set of screenshots only).

Testing instructions:
n/a

Proposed commit message: (wrap lines at 72 characters)

Adjust margins and padding for better readability

Some elements have too big or too small margins and/or padding.

This negatively affects the readability of the contents, especially on
mobile devices.

Let's adjust these margins and padding by shrinking large ones and
increasing those that are small.

Increasing small margins/padding would separate different bodies of
text more clearly (and thus allowing the reader to easily differentiate
between them), while decreasing large margins/padding would allow for
more text to be displayed on mobile screens in particular, which
minimizes the amount of scrolling the reader needs to do.

---

Checklist: ☑️

• Updated the documentation for feature additions and enhancements
• Added tests for bug fixes or features
• Linked all related issues
• No unrelated changes

[ang-zeyu]

let's replicate this in all the other ones containing the .indented class too for consistency (especially the docs)

[riyadh-h]

Thanks for pointing that out!
I think I forgot to modify them as well when I was updating the test files 😅

[ang-zeyu]

Could use some for the header as well to align things

Suggested change

	.box-header-wrapper {
	padding: 0.75rem 0.75rem 0.1rem;
	}

[riyadh-h]

Will do 👍

[ang-zeyu]

Lgtm!