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Layout directives for responsive columns

This guide shows how to place two or three fragments side-by-side using a simple markdown directive, without writing any HTML.

Syntax

Use a horizontal rule with an attribute list to declare the layout container. The directive is recognized at runtime and wraps the next N fragments into a responsive grid.

--- {: .pm-cols-[bp]-[n] [optional Tailwind classes] }

[bp]: sm, md, or lg breakpoint. If omitted, defaults to md.
[n]: column count 2 or 3.
Optional utilities after the directive class (e.g., gap-4) are applied to the container.

The directive consumes itself and wraps the next n fragments (whatever their types are), keeping mobile as a single column and switching to columns at your chosen breakpoint.

Example: two columns on small screens and up

Below example uses your paragraph and SVG side-by-side starting at the sm breakpoint. On smaller screens it stacks.

--- {: .pm-cols-sm-2 }

On a représenté la Corse sur la carte ci-dessous. Cette carte est en $2$ dimensions, elle est représentée sur une surface plane ($=$ "à plat").  On superpose un quadrillage assez particulier sur la carte, il s'agit de ce type de quadrillage qui sont (entre autres) sur les globes terrestres.

![Carte de la Corse](/static/pm/corsica/files/corsica_grid_with_grid.svg)
{: .max-w-[340px] .mx-auto}

Variants

--- {: .pm-cols-md-2 } two columns on md and up
--- {: .pm-cols-lg-2 } two columns on lg and up
--- {: .pm-cols-md-3 } three columns on md and up
Add spacing: --- {: .pm-cols-md-2 gap-4 }

Custom column percentages

You can set explicit percentages for each column with a .cols-… token:

--- {: .pm-cols-md-2 gap-4 .cols-30-70 }

Texte (30%).

![Carte de la Corse](/static/pm/corsica/files/corsica_grid_with_labels.svg)
{: .max-w-[600px] .mx-auto}

Works with three columns too, e.g. .cols-25-50-25.

Vertically centering a single fragment

Use helper classes on the fragment to align within its grid cell:

.pm-self-center: vertical centering (align-self: center)
.pm-place-center: both vertical and horizontal centering (place-self: center)

Example:

--- {: .pm-cols-sm-2 gap-5 .cols-60-40 }

Paragraphe centré verticalement dans sa colonne.
{: .pm-self-center }

![Carte de la Corse](/static/pm/corsica/files/corsica_grid_simple_no_title.svg)
{: .max-w-[420px] .mx-auto}

Notes

No HTML is required. Keep writing normal markdown.
Any fragment types can be grouped (paragraphs, images, SVGs, lists, radios, etc.).
Attribute-list classes on your fragments (like the image’s .max-w-[340px] .mx-auto or .pm-self-center) are preserved.