Keeping a brand consistent across a website
A brand guide is useful only if the people publishing the site can apply it. Define the few decisions that come up most often: type sizes, color use, image treatment, button labels, and spacing. Put those choices into reusable components.
Leave room for different kinds of content. A case study, a contact form, and a product page should not be forced into the same layout. Consistency comes from shared rules, not identical pages.
When the site changes, review a few real pages at desktop and mobile widths. That catches drift earlier than a large redesign years later.
