gist.github.comとgist@github:enteriseを区別するCSS

gist.css

.header-logo-wordmark {
  color: red;
}

.form-actions button {
  color: red;
}

#gists:before {
  content: "This is github.com!";
  color: red;
  font-size: 1.1em;
  font-weight: bold;
}