A17-split-screen-contrast

A17 — split-screen contrast

Composes

pop-in or slide on each panel (parallel timing)
Optional squiggle-draw-on for a divider between panels
bg-swap on entry

Layout

canvas: 1080x1920 (or pack-specified)

split_axis: vertical (most common) | horizontal

panel_left: position: left half (or top half) width: canvas_w / 2 (or full width if horizontal) bg: color_A copy_position: center of panel

panel_right: position: right half (or bottom half) width: canvas_w / 2 bg: color_B # contrasting copy_position: center of panel

divider: # optional thin_line_or_squiggle color: ink


## Choreography

```yaml
phase_1_panels_enter:
  start_frame: 0
  effect: pop-in on both panels
  stagger_frames: 0-2                    # near-simultaneous

phase_2_copy_appear:
  start_frame: 8
  effect: pop-in on copy (inside each panel)
  parallel: true

phase_3_optional_divider:
  start_frame: 16
  effect: squiggle-draw-on (if pack supports)

phase_4_hold:
  start_frame: 24
  duration_frames: ≥ 30

Style pack compatibility

supported: [SP-A, SP-E]
preferred_in: [SP-E]
incompatible: [SP-C, SP-D, SP-F]

Pack-specific overrides

SP-E (chaos-card) — canonical

Two saturated swatches contrasting (e.g. hot-pink "makers" / "breakers").
Heavy display type, all caps.
Music beat anchor.

SP-A (marshmallow)

Pink left, cream right.
Less common in this pack — feels more like SP-E energy.

Duration

duration_seconds: [1.5, 2.5]
default: 2.0

Short — the contrast lands quickly.

Quality Checks

Two panels are visually distinct (different colors, not just dividing line).
Copy in each panel is centered or anchored consistently.
Both panels enter near-simultaneously (≤ 2-frame stagger).
Divider (if used) doesn't dominate the composition.

Failure Modes

Panels look like one panel with a thin divider. Bgs aren't contrasting enough. Pick higher-contrast pair.
One panel enters much later than other. Stagger too large. Reduce to 0-2 frames.
Copy doesn't fit inside each half-panel. Reduce font size or shorten copy.