one fixed size column and the other flex

[applemate]

column A is on the left, with fixed width 400px column B is on the right, flex

How you do it with this framework?

[slackerzz]

you can create a class for your fixed-size element like:

.col-fixed {
    max-width: 400px;
    flex-basis: 400px;
}

and the use .col-xs for the other one