The "Gotcha": Using a dedicated `<div>` with a tiny height (e.g., `h-px`) and a background color is often more flexible for horizontal dividers than just `border-t` on an existing element, especially for controlling spacing precisely around the line itself.
Content Section A.
Content Section B (after `border-t` divider).
Content Section X.
Content Section Y (after `h-px` divider).
Content Section P.
Content Section Q.
Key takeaway for the "Gotcha": The `<div class="h-px bg-color my-X">` approach gives you a standalone divider element. You can then use margin utilities (like `my-4`, `mt-2`, `mb-6`) directly on this divider element to precisely control the space above and below it, which is generally more flexible than `border-t` applied to a content block.