Invisible CSS Library
Mobile first CSS library with responsive grid layout, baseline grid, and useful utilities.
No widgets, no decoration, only inivisible stuff that helps you laying out you content.
Based on Bootstrap grid. Grid is customizable with Stylus variables.
Made with Stylus preprocessor. It's optional, if you need an advanced control.
Customizable with CSS-variables. Almost every values can be changed: size of grid gutter and spacers, width of container.
Baseline grid is configured with css-variables and depends from line-height. Show baseline grid.
Why
If you like to use Bootstrap grid and css-utilities, but you don't need widgets and javascript and decoration styles from it. If you prefer Stylus over Saas. If you don't want to mess with preprocessors at all, but still want some customization.