Logo disappears after altering CSS class

[D1StrX]

I currently have this custom CSS in place. But the text without the ItemDetail_release is unreadable as seen below, hence the white text.

Logo

But for some reason the logo left top becomes unavailable. Any idea why this class causes that?

body {
  background: #e0f7fa;
  color: #333333;
}

[class^="ItemDetail_release"] {
  color: white;
}