*{
  box-sizing: border-box;
}
body{
  font-family: tahoma, Arial;
}
.quiz-app{
  margin: 20px auto;
  width: 800px;
  background-color: #f8f8f8;
  padding: 15px;
}
.quiz-app .quiz-info{
  display: flex;
  background-color: #fff;
  padding: 20px;
}
.quiz-app .quiz-info .category{
  flex: 1;
}
.quiz-app .quiz-info .count{
  flex: 1;
  text-align: right;
}
.quiz-app .quiz-area{
  background-color: #fff;
  padding: 20px;
  margin-top: 15px;
}
.quiz-app .quiz-area h2{
  margin: 0;
}
.quiz-app .answers-area{
  background-color: #fff;
  padding: 0 20px 20px;
}
.quiz-app .answers-area .answer{
  background-color: #f9f9f9;
  padding: 15px;
}
.quiz-app .answers-area .answer:not(:last-child){
  border-bottom: 1px solid #dfdfdf;
}
.quiz-app .answers-area .answer input[type="Radio"]:checked + label{
  color: #0075ff;
}
.quiz-app .answers-area .answer label{
  cursor: pointer;
  font-weight: bold;
  color: #777;
  font-size: 14px;
  margin-left: 5px;
  position: relative;
  top: -1px; 
}
.quiz-app .submit-button{
  background-color: #0075ff;
  display: block;
  width: 100%;
  padding: 15px 15px;
  border: none;
  color: #fff;
  font-weight: bold;
  font-size: 18px;
  cursor: pointer;
  border-radius: 6px;
  margin: 20px auto;
}
.quiz-app .submit-button:focus{
  outline: none;
}
.quiz-app .bullets{
  border-top: 1px solid #dfdfdf;
  background-color: #fff;
  display: flex;
  padding: 20px;
}
.quiz-app .bullets .spans{
  flex: 1;
  display: flex;
}
.quiz-app .bullets .spans span{
  width: 20px;
  height: 20px;
  background-color: #eee;
  margin-right: 5px;
  border-radius: 50%;
}
.quiz-app .bullets .spans span.on{
  background-color: #0075ff;
}
.quiz-app .results span{
  font-weight: bold;
}
.quiz-app .results span.bad{
  color: #dc0a0a;
}
.quiz-app .results span.good{
  color: #009588;
}
.quiz-app .results span.perfect{
  color: #0075ff;
}