Stuck on step 42 of learn css variables by building a city skyline

Hi,

please help me out, i am stuck on step 42 for more than a day.

I think you’re supposed to add it in the html, like:

<div class="bb1a bb1-window"></div>

You need to add the class bb1-window to bb1a, bb1b, bb1c
I hope this help :slightly_smiling_face:

Thanks guys!

i have another problem, stuck at step 52…

could you help me please?