How to stack divs responsively?

[Rohit Tigga]

How exactly does one stack divs for each column inside the row on a smaller screen or mobile?

Is that not possible with the framework?

Example (Desktop):

Example (Mobile):

Here's a JSFiddle that demonstrates what I am saying.

https://jsfiddle.net/RohitTigga/mfv622rt/

[Sebastian Nordqvist]

Have you tried having a row of columns that you set to 100% on small devices using the 12 column class?

[Kerim Incedayi]

like this: https://jsfiddle.net/dmbfucmr/