Two items — core keeps its own layout
Below three, nothing is claimed: this is core’s column flow, untouched.
Three items — all pictures
Feature down the left, two stacked beside it. 61/37 split.
Three items — video in the feature slot
The arrangement the article design draws, with an overlay caption.
Four items — video in the feature slot
Half-width feature, two above one.
Four items — video in a small slot
A video anywhere an image can go: here it is the third tile, not the feature.
Four items — captions on every tile
Captions lie over the bottom of each tile rather than under it.
Five items — one behind the count
Tile 05 is in the markup and in the lightbox, but not in the grid.
Eight items — four behind the count
The lightbox should swipe through all eight, in order.
Twelve items, videos among the hidden ones
Tiles 05 to 12 sit behind “+8”; two of them are videos, so the lightbox has to carry players past the fold.
Four items with a gallery caption
The gallery’s own caption is a sibling of the tiles, and must not be counted as one.