Start with the layout, like the header and main content area. Then create page components for each route. Then build reusable primitives like Button, Card, and Input, which you will use everywhere.

Because building them once with consistent styling saves repetition later. A Button or Card built early is used everywhere, so your UI stays consistent and you do not write the same styling on every page.

Yes. Create stubs of all your components with placeholder content first, so the structure is visible. Then iterate, replacing stubs with real content one at a time. This makes the structure clear before you invest in details.