Hi Eunjisong, the problem is occurring because you have given a margin of 10px in class “list-group-item”. Just remove that and it will solve your problem. You’ve given the top margin 10px either reduce it to less or remove it. Or you can also reduce the font size of the elements in the list to less than 20px.
To help you out the code that will be changed is in the css.
/What you wrote/
margin: 10px; //here is the problem
/*The code should be */
/here removing the margin/
There could be other solutions too, I hope it helps.