At least the following were missing. After adding them it seems that the UI is ok at first glance.

#mod-quiz-edit .statusdisplay{
background-color:#ffc;
}
#mod-quiz-edit div.quizpage span.pagetitle{
color:#006;
}
#mod-quiz-edit div.quizpage .pagecontent{
background-color:#d6d6d6;
}
#mod-quiz-edit div.question div.qnum{
color:#333;
}