/* ============================================================================ GAP MINING — CANONICAL SHARED BACKGROUND (site-bg.css) ---------------------------------------------------------------------------- ONE backdrop for every page: the gold-crystal circuit image over #07090f with a top-light → bottom-dark legibility vignette. This matches the index.html hero exactly (same image, same anchor point `center 15%`). USAGE (every page except index.html, which already IS the reference): 1. — placed AFTER the page's inline