Sections as paper sheets.

Read the brainstorm line "the paper ends, and another piece of paper starts" as: every section becomes a separate paper sheet. Implemented it via a single CSS rule that gave each section > div.mx-auto a faint paper background, drop shadow, and alternating tilt.

Two problems became obvious in the next review:

• Text doesn't belong in a box.The brand puts text directly on the paper. The graph paper, the ink, the stains — that's the surface. Putting prose into a white secondary sheet on top of the paper hides the paper.
• It nested the yellow label-sheets inside white sheets.The label-sheet from Iteration 08 was meant to sit directly on the paper, not be wrapped in another sheet. Iteration 10 broke 08's intent by accident.

Different content types get different physical treatments — there isn't one universal "section sheet". So far:

• Prose — sits directly on the paper. Default.
• Grid of card-like items — yellow label-sheet (Iteration 08).
• Video / photo — pending. Likely something cardboard-mount-shaped per the original brainstorm.

Future iterations will introduce surface treatments per content type. Each one earns its own iteration entry rather than hiding inside a single "sections become sheets" rule.

Removed the section > div.mx-auto styling and its alternating-tilt rule from globals.css. The Z-plane animation from Iteration 09 was retargeted back to its original list (cards, label-sheets, headlines).

The label-sheet from Iteration 08 stays — it now sits directly on the paper as intended.

Parked. The lesson — surface treatments are per-content-type, not universal — is the actual deliverable. A future iteration will pick up specific treatments (a cardboard mount for video, a sticky note for asides, etc.) and earn its own entry.