button stopped changing color on hover

Hello, recently you guys helped me fix an issue.

However, it's back to normal now and I cannot even find the same CSS editor in my themes toolbar anymore.

I don't know what happened.

So, now the big donate button towards the bottom of the homepage is no longer changing to white when i hover over it.

Here is how your guy fixed it last time:

"Fortunately, there's also a Custom CSS editor tool built-in into your theme (Dashboard -> "Appearance" -> "Edit CSS") so I've added this code there:

.btn-donate-bottom span:hover {background:white!important;}

Now the "Donate" button on your front page is gradually fading to white on hover (mouse over)."