A7-color-block-headline-slate

A7 — color-block headline slate

Composes

bg-swap (hard-cut on scene entry — the saturated color IS the visual punch)
pop-in (on the headline)
Optional squiggle-draw-on accent (underline under the headline)

Layout

canvas: 1080x1920 (or pack-specified)

headline_zone:
  anchor: center
  origin: { x: canvas_w/2, y: canvas_h/2 }
  align: center
  max_width_pct: 80
  vertical_align: center

squiggle_accent: # optional anchor: below headline origin: { x: canvas_w/2, y: headline_y + 80 } width: 280 align: center


## Choreography

```yaml
phase_1_bg_swap:
  start_frame: 0
  mode: hard-cut

phase_2_headline_pop:
  start_frame: 4               # let the bg-swap "land" first
  effect: pop-in
  delay_frames: 4

phase_3_optional_accent:
  start_frame: 12              # after headline settles
  effect: squiggle-draw-on
  duration_frames: 14

phase_4_hold:
  start_frame: 30
  duration_frames: 30          # 1.0s hold

Style pack compatibility

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

SP-A doesn't use centered headlines (always anchors). SP-D is mono and continuous-scroll. SP-F doesn't hard-cut.

Pack-specific overrides

SP-B (pinterest-saturated)

Bg from rotation pool — saturated swatch.
Headline: Inter Italic 700 at h1 size (88px).
Squiggle accent: hand-drawn, draws on with stroke-on, ends in arrow tip.

SP-E (chaos-card)

Bg from rotation pool — saturated swatch.
Headline: Inter 900 at display size, ALL CAPS.
Squiggle accent: optional, more "wobble", less polish.
Music beat anchor required.

Duration

duration_seconds: [1.0, 1.8]
default: 1.5

This is a punctuation beat — should NOT linger. Used as breath between heavier scenes.

Quality Checks

Headline fits within max_width_pct at the pop-in peak.
No more than ONE squiggle accent per slate (more reads as clutter).
Scene duration ≤ 2.0s — anything longer should be a different archetype.

Failure Modes

Headline too long for centered layout. Two-line headlines are OK but more than 2 lines = wrong archetype. Use A12 (letter-as-canvas) or split into multiple A7 slates.
Two consecutive A7 slates with same bg. Pack rhythm forbids — orchestrator validates at impl-brief time.
Squiggle covers headline ascenders. Move squiggle below the headline baseline + 80px minimum.