BlackGanglion

Results 3 issues of BlackGanglion

I find the index.css of the exercise one which can't work. A lot of .class should be replaced of #id , so I revise it. [https://github.com/BlackGanglion/Practice/blob/master/backbone-practice/Exercise-1/assets/index.css](https://github.com/BlackGanglion/Practice/blob/master/backbone-practice/Exercise-1/assets/index.css)

fix: editor is covered by Nav and Left Menu when enlarged

sorry, I can't understand the solution in the docs, please could you explain it and tell me how to solve it,thanks ~~