.quiz-container{
    background: #fff;
    padding: 20px;
    border-radius: 5px;
}
.quiz-container .pergunta h2{
    font-size:18px !Important;
}
ul.alternativas{
    padding:0 !Important;
    list-style: none !Important;
}
ul.alternativas li input{
    margin-right: 10px;
}
.quiz-container input[type='submit']{
    margin-left: auto;
    margin-right: auto;
    width: 250px;
    text-align: center;
    display: block;
    margin-top: 60px;
    background: #8ab31d;
    color: #fff;
    border: #000;
}