Susy will output calc values in order to achieve this.
Susy grid gutter.
Gutters or alleys are spacing between content tracks.
You can collapse a gutter in foundation removing the margins and padding but then you can run into other issues.
Susy gives the designer and developer a great flexibility to transform the content in any grid system.
These can be created in css grid layout using the grid column gap grid row gap or grid gap properties.
Css width margin padding flex basis transform etc.
It specifies where the gutter should be output with reference to the columns.
For asymmetrical fluid grids slice can help manage your nesting context.
By default a grid span only spans the gutters between columns.
In the example below we have a three column and two row track grid with 20 pixel gaps between column tracks and 20px gaps between row tracks.
It can be found in the global settings within the susy map.
A grid framework not a grid system.
Additionally typically depending on the grid and the grid settings you will need to declare the last grid column by using the last mixin.
Bootstrap on the other hand rely on a 12 column grid system.
Browse other questions tagged grid susy sass gutter or ask your own question.
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Looks like susy handles this a lot better among other things.
These three functions form the core of susy s layout building grid api.
The downside of this limitation is that any website looks the same.
So that same span of 2 could include the internal gutter and one wide or both wider external gutters.
The gutters setting is what you are looking for.
So a span of 2 includes 1 internal gutter narrow.
That system is susy.
It is not a good and not a bad grid system it matches just somehow any content.
But the grids in susy appear to be definitely more powerful especially the gutter positions.
Use span and gutter to return any grid width and apply the results wherever you need them.
Gutter position is one of the settings that susy allows you to change for your layouts.
Also gutter position is also worth taking a look at.
It also specifies whether they should be output as margins or paddings.
Before we get into the how to use susy let s talk about the importance of using a sass grid framework not a grid system.
In some cases you want to span additional gutters on either side.