Hover not working in css

Question: I am trying to make a game where you can build circuits in html. I tried to make the input and output nodes enlarge when you hover over them with your mouse but it isn’t working. Can somebody help me fix this?

Repl link: https://Replit.com/@resistingguide4/test-1

Hello @ResistingGuide41!

IDs should not be used multiple times. Instead, define multiple classes, like this:

<div class="firstClass secondClass"></div>

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