Hey,
While reading the W3 Flexbox documentation, I noticed that stretch is not an available value of the justify-content property.
According to the MDN, it is and that should be changed.
I tried it in a JSfiddle, it doesn’t work: JSFiddle
Here’s the link to the justify-content documentation: W3 Documentation
Here’s the link to the MDN document: MDN ‘justify-content’ Page
Best,
Naomi