Bootstrap is a css framework that makes css styling a whole lot easier for you. In this codebase, bootstrap's spacing utility is frequently used. Click here to access Bootstrap docs.

CSS frameworks like Bootstrap and TailwindCSS are designed to reduce or completely eliminate the need for writing separate .css files. Instead, styles can be applied directly in your HTML using predefined classes, making development more convenient.

Since Vue uses SFCs (Single File Components), and combines HTML, Javascript, and CSS all in one file, using <style scoped> makes styling already a lot more convenient.

That said, before jumping into <style scoped> to write something like:

margin-bottom: 1rem;

You should consider using Bootstrap’s spacing utility instead:

<div class="mb-3"></div>

To keep our codebase clean and consistent, always prefer Bootstrap’s utility classes (like mb-3, text-center, d-flex, etc.) over writing custom CSS in <style scoped>. These utilities cover most common styling needs such as spacing, alignment, colors, and layout.

Use <style scoped> only when:

• You need to define custom styles not covered by Bootstrap (e.g., a unique font family or a custom color),
• Or when overriding Bootstrap defaults in a controlled and component-specific way.

This approach helps us:

• Maintain a uniform design language across the app
• Reduce redundant CSS
• Speed up development

Throughout the codebase, you’ll see classes like px-2 and m-3. These are Bootstrap utility classes that control padding and margin. They provide a fast and readable way to apply spacing without writing custom CSS.

Click here to read more, below is a short summary.

• m – margin
• p – padding

• t – top
• b – bottom
• s – start
• e – end
• x – left and right (horizontal)
• y – top and bottom (vertical)
• (omitted) – all sides

• 0 – 0 spacing
• 1 – 0.25rem
• 2 – 0.5rem
• 3 – 1rem
• 4 – 1.5rem
• 5 – 3rem
• auto – auto margin (only for m)

rem, or root element, is a measurement that corresponds to the font size of the root element. By default in most browsers:

html {
    font-size: 16px;
}

Therefore, in this case, 1rem = 16px, 0.5rem = 8px, etc.