# grid-card-assemble — Grid / Card Assemble

**intent**: N items (tiles / cards / logos / list-lines) self-assemble in a staggered cascade into a grid or vertical list and hold — a "look how much / who / what it does" beat that enumerates breadth at once; an optional camera zoom-OUT pulls back to reveal the assembled array sitting inside a vaster whole.

**roles served**

- Key_Feature (from key-feature-card-grid-assemble): a grid of labeled feature tiles/pills (icon + label) cascades one-by-one into a 2-col-brick / 3×3 grid, then holds near-static with a slow push-in — enumerate many capabilities, no live UI, no cursor.
- Key_Feature (from key-feature-glass-card-camera-reveal): open TIGHT on 2–3 glowing icons; a camera zoom-OUT unfolds a row of glassmorphism cards that grow from behind the icons (icons shrink to card headers), center card scales forward, the group floats, then sweeps out — a "pillars revealed at once" reveal variant of the same assemble shape.
- Benefits (from benefits-vertical-list): short value phrases populate a single vertical list ~1 item/sec, co-resident and accumulating; each line enters via a spring marker-pop + check-draw + pill mask-wipe, OR the whole stack snaps up one slot per beat (slot-machine) so the newest lands in the bright focal slot.
- Social_Proof (from social-proof-logo-grid-zoom-out): a wall of partner/app logos builds into a center grid (whole-enter / randomized pop-in / column slide-up), an optional headline + accent-gradient proof-number fills in above, then a continuous camera zoom-OUT shrinks the array to reveal a vast ecosystem; optional fixed HUD/viewfinder brackets; optional grid slide-up fly-out exit.

**duration**: 3.0–10.5s (Social_Proof 3.0–6s · Key_Feature grid 5.8–7.3s · Key_Feature glass-card 6.5s · Benefits list 6.5–10.5s, scaling ~1 item/sec with count)

**shot structure** (consolidated template — concrete motion verbs, [slots])

- **Scene 1 (0.0–~1.0s) — open + first arrivals.** On a `[gradient / radial / dark background]` (optional `[dot-grid / drifting-watermark]` texture), an empty `[grid or list region]` is established and items begin to ASSEMBLE in a quick staggered cascade (~0.04–0.08s gap; list pacing ~1 item/sec). Each `[item: feature tile / pill / logo tile / benefit line]` fades + slides/scales a short distance directly into its slot (low drama — no scatter, no big bounce; spring overshoot reserved for accent markers). Camera static. An opening `[headline / hook]` may fill in line-by-line above the array, with any `[proof number]` counting up in an `[accent gradient]`.
- **Scene 2 (~1.0s–~Xs) — array resolves + holds.** Remaining items finish arriving; layout resolves into the final `[2-col-brick / 3×3 grid / dense mosaic / stacked list]`. The completed array HOLDS, alive but resting: a gentle continuous parallax/sine FLOAT on the tiles and/or a slow camera push-in (faint scale-up). Optional `[accent-color]` glow TRAVELS across/behind the tiles.
- **Scene 3 (~Xs–end) — settle / reveal / exit.** Everything settles and holds to the end, OR the optional camera modifier runs (see below), OR a `[closing line / CTA]` book-ends the array.

Variants (where roles diverge from the template):

- **Variant — Key_Feature grid**: items are labeled `[icon + feature-label]` tiles/pills assembling into a 2-col-brick / 3×3 grid; near-static hold with slow push-in + optional traveling-glow sweep; headline book-ends (`[hook]` → `[CTA]`). No camera reveal.
- **Variant — Key_Feature glass-card-reveal**: the assemble is CAMERA-DRIVEN, not element-stagger. Open tight on `[2–3 glowing icons]`; camera zoom-OUT grows `[N]` glass cards out from behind the icons (icons shrink ~50% to become card headers), `[center card]` scales ~105% and moves forward to overlap the sides (quick spring); cards hold side-by-side with continuous parallax float; exit = fast motion-blur SWEEP slides the cards off-frame.
- **Variant — Benefits vertical-list**: a single vertical `[benefit-line]` stack, ~1 item/sec, two sub-modes — (a) BUILD: each line stays fully lit; entry = `[marker]` spring-pop + `[check/icon]` draw-in + `[pill]` mask-wipe of the text; (b) SNAP: the whole stack steps up one slot per beat (~0.1s eased) so the newest line lands in the bright focal slot and lines leaving it dim by position. Static camera; optional perpetual `[decorative orbit/disc]` on the opposite side. No camera reveal.
- **Variant — Social_Proof logo-wall-zoom-out**: intro beat (`[trusted-by headline]` card OR a `[product screenshot]`) crossfades/cuts to a center logo grid that builds (whole-enter / randomized pop-in / column slide-up); a continuous camera zoom-OUT then shrinks the whole grid toward center to reveal a vast ecosystem and holds; optional fixed HUD/viewfinder brackets; optional exit = whole grid SLIDES UP and flies out through the top.

**motion vocabulary**: item stagger-assemble (fade + short slide/scale into slot) · brick/grid/list layout resolve · randomized pop-in · column slide-up · vertical-list step (slot-machine snap-and-hold) · spring-overshoot marker pop · check/icon draw-in · pill/label mask-wipe reveal · dim-by-position de-emphasis · line-by-line headline fill · accent-gradient number count-up · near-static hold · gentle parallax/sine float on hold · slow camera push-in · camera zoom-OUT reveal (continuous OR phased pull-back) · cards-grow-from-behind-icons · icon-shrink-to-header · center-card scale-up + forward overlap (spring) · traveling-glow sweep · fixed HUD/viewfinder brackets · motion-blur slide-out sweep (exit) · grid slide-up fly-out (exit) · book-end headline fade · perpetual decorative orbit/loop.

**rule mapping** (motion verb → `rule-id`)

- item stagger-assemble into slot → `center-outward-expansion` (per-item stagger + short-path slide variant; for a wall too dense for a true center burst, use it in its "starting partially-spread"/direct-into-slot form — see merge tension)
- brick/grid/list layout resolve → `center-outward-expansion` (target positions = final layout slots)
- randomized pop-in stagger → `gsap-effects` (stagger recipe; randomized `from`/order)
- column slide-up into grid → `gsap-effects` (per-column staggered slide-up)
- vertical-list step / slot-machine snap-and-hold → `vertical-spring-ticker` (STEPS = number of line advances)
- spring-overshoot marker pop → `spring-pop-entrance` (back.out spring) — also `gsap-effects` for the staggered pop chain
- check / icon draw-in inside marker → `svg-path-draw`
- live line-art icon in a tile (internal parts) → `svg-icon-enrichment`
- pill / label mask-wipe text reveal → `techniques.md` (clip-path reveal)
- dim-by-position de-emphasis → `gsap-effects` (per-line opacity by slot position; no dedicated rule)
- line-by-line headline fill → `discrete-text-sequence`
- accent-gradient proof number count-up → `counting-dynamic-scale`
- gentle parallax / sine float on hold → `sine-wave-loop` (apply the concurrent-elements amplitude `/√N` rule for a held grid)
- slow camera push-in → `multi-phase-camera` (steady-push phase pattern)
- center-card scale-up + forward overlap → `spring-pop-entrance` (the quick spring) + `techniques.md` CSS-3D (z-depth overlap)
- cards-grow-from-behind-icons / icon-shrink-to-header → driven by the camera reveal (`multi-phase-camera`) — the grow/shrink are scale tweens chorded to the pull-back phase; no separate rule
- fixed HUD / viewfinder brackets → `ai-tracking-box` (static-bracket variant — overlay frame, not tracking)
- book-end headline fade → `discrete-text-sequence` (or `gsap-effects` fade)
- perpetual decorative orbit / disc / loop → `sine-wave-loop` (or `orbit-3d-entry` if it's an orbiting badge ring)
- traveling-glow sweep across/behind tiles → `ambient-glow-bloom` (one-pass traveling glow sweep across the tiles)
- motion-blur slide-out sweep (glass-card exit) → `motion-blur-streak` (directional velocity blur on the fast sweep that carries the cards off-frame)
- grid slide-up fly-out exit → `gsap-effects` (plain staggered translate-off-frame; no dedicated rule needed — a basic exit tween, not a missing capability)

**camera modifier — zoom-OUT reveal** (optional; the role-defining move for the glass-card and logo-wall variants): a camera wrapper around the whole array scales DOWN over the hold, revealing the assembled grid/cards sitting inside a larger environment (ecosystem scale, or a row of cards unfolding from tight icons).

- Continuous single-pass zoom-out (Social_Proof ecosystem pull-back) → `viewport-change` (one wrapper, `cam.scale` ↓ via onUpdate — single source of truth)
- Phased pull-back → focus → settle, with built-in drift (Key_Feature tight-icons → cards-unfold) → `multi-phase-camera` (use the "Dramatic reveal: push → neutral → pull" / pull-back phase pattern; grow/shrink of cards chords to the pull-back phase)

---

```
BLUEPRINT: grid-card-assemble — serves Key_Feature, Benefits, Social_Proof (folded 4 drafts)
RULE GAPS: none — traveling-glow sweep → ambient-glow-bloom; motion-blur slide-out sweep (exit) → motion-blur-streak; grid slide-up fly-out (exit) → gsap-effects (plain translate)
```

Merge tension: `center-outward-expansion` (the natural backing for stagger-assemble) caps cleanly at 3–8 items and explicitly warns 8+ causes mid-flight overlap chaos — but a Social_Proof logo wall is deliberately dense (12+ tiles), so for that variant the items must NOT burst from a shared center; they slide a short distance directly into their own slot (the rule's "starting partially-spread"/short-path form, or a `gsap-effects` per-item stagger), which the consolidated Scene-1 verb already specifies as "short distance directly into its slot."