Base on Bootstrap grid system.
Mobile, tablet, and desktop
Get three equal-width columns starting at desktops and scaling to large desktops. On mobile devices, tablets and below, the columns will automatically stack.
Get three columns starting at desktops and scaling to large desktopsof various widths. Remember, grid columns should add up to twelve for a single horizontal block. More than that, and columns start stacking no matter the viewport.
Get two columns starting at desktops and scaling to large desktops.
No grid classes are necessary for full-width elements.
Per the documentation, nesting is easy—just put a row of columns within an existing column. This gives you two columns starting at desktops and scaling to large desktops, with another two (equal widths) within the larger column.
At mobile device sizes, tablets and down, these columns and their nested columns will stack.
