I really don’t know what I’m missing.
In the future, don’t paste pictures of code in here. Instead, use the “Get help” icon button to ask a question in here. When you do that it will automatically include your code.
Those red squiggly lines in your code are telling you that there is an error. Since I can’t see all of your CSS, I can only guess. I’m going to guess that you accidentally deleted the closing curly brace in the ruleset above this one.
Thank you for the advice.