The score.

Design a joyful kinetic paper opera called “FOLDSPACE / Paper becomes motion.” The experience must feel sunny, physical, and surprising, never like dark technology or a broadsheet. Use a porcelain field with cobalt, persimmon, yolk, and mint. Generate three radically different concepts. Each concept needs a thesis, a signature moment, a scroll story, a technique, its greatest risk, and a resilient fallback. Choose the strongest concept for a fast, accessible static Astro site. The signature must be an origami stage that unfolds into spatial typography.

Build the selected Fold Choir concept as a standalone Astro experience. Drive the signature primarily with authored HTML and CSS: perspective, preserve-3d, transform origins, view or scroll timelines, variable font width, and chromatic paper shadows. Add a tiny progressive-enhancement script only for three tactile controls: fold, turn, and re-ink. Do not use WebGL, stock imagery, generated photography, remote fonts, runtime style mutation, inline event handlers, a card grid, or generic fade-up animation. Keep all essential copy in normal document flow. Provide complete reduced-motion and no-JavaScript states, 44px controls, keyboard focus, semantic headings, and strict CSP compatibility.

Review the completed FOLDSPACE site against DESIGN.md at 1440, 768, 390, and 320 CSS pixels. Pass one: find defects in layout, interaction, console behavior, touch, focus, reduced motion, and no-JavaScript composition. Pass two: test one specific hypothesis for greater paper depth or tactility without adding a second signature. Pass three: reduce noise and tune cohesion, pacing, typography, and the transition from performance to guide. Record concrete findings, fixes, and screenshot evidence. Reject dark-tech styling, broadsheet habits, generic cards, meaningless motion, and any rendered em dash.