A local editable five-row cost comparison with exact arithmetic and neutral difference language.

A feature card for a fictional energy co-op: a serif heading and a quiet description above an inset grey widget with a dashed warm frame, a square-bulleted title and a base-unit select, a square underlined search field and hairline rows of grid-zone tariffs, each with a rounded-square identity mark, a zone name over a conversion subline, and a value above a filled trend triangle and percentage; changing the unit recalculates every row locally and the search filters rows with an honest empty message.

A dark pricing section with one vivid orange offer card, clear billing choices and a working local plan review.