/* ============================================================================ ionicGRiD — core.css : the ONE copy of the design system. Extracted 2026-09-08. Linked by index.html, how-it-works.html and ionicSense.html, in that role replacing the hand-copied duplicates each of them used to carry inline. WHY THIS FILE EXISTS. The site's standing rule is one self-contained file per page, no build step. That held while there was one page. By 2026-09 the same ~9KB of tokens, reset, nav, buttons and base type existed in four places — index.html's inline block, how-it-works.html's verbatim copy of that block, shared.css, and the whole lot again in the v3 tree — and PENDING-ITEMS §2.3 had been carrying "any token change must be hand-copied across N files" as an open item for two months. It had already cost something real: shared.css's `.gold` was still the pre-shimmer version, so gold headings on the sub-pages were quietly not doing what gold headings on the main page do. Nobody edited them apart; one of the four copies simply never got an update. WHAT IS IN IT, AND WHY EXACTLY THIS MUCH. This is the longest run of lines that was byte-identical, IN THE SAME ORDER, at the top of both index.html's and how-it-works.html's style blocks — a true common PREFIX, not a cherry-picked set. That matters more than it looks: had rules been lifted out of the middle, everything that used to precede them would now follow them, and in CSS that silently changes which rule wins between two of equal specificity. A prefix moved into a stylesheet linked immediately before the page's own