Grid

CSS Grid

.my-container

col 25%
col 50%
col 25%

Bootstrap Grid

.container

col
col
col
col
col

.container-fluid

col
col
col
col-md
col-md
col-md
col
col
col-2
col-10
col-6
col-6

Unsemantic Grid

grid-container

col 25%
col 75%