Button alignment issue with screen width

Site URL: https://robin-impala-w8cj.squarespace.com/config/

The buttons extend past the card. When the screen is adjusted.

If I remove my css the buttons look like the last screen shot (i can't find any other button css) 

Any help will be much appreciated!!!

2 hours ago, amyleehayward said:

Site URL: https://robin-impala-w8cj.squarespace.com/config/

The buttons extend past the card. When the screen is adjusted.

If I remove my css the buttons look like the last screen shot (i can't find any other button css) 

 

Any help will be much appreciated!!!

Try

.list-item-content__button-container {
  display: flex;
  justify-content: center;
}

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