True Blueprint.

True-blueprint deck theme: a blueprint-blue #0b3a6f full-bleed field under a 40px white drafting grid, dashed-border translucent cards, white and ice-blue #aee1ff ink lines with amber #ffd27a annotations, every glyph in JetBrains Mono, 2px corners, zero shadows. Drawing-sheet chrome (title block, sheet index, construction-line section numbers, hatched CSS bars, inline-SVG schematics) makes it the natural skin for system-architecture and engineering-design decks. Single self-contained HTML file, zero external JS. Based on lewislulu/html-ppt-skill blueprint theme.