body{
    background-color: #001e4d;
}

.app{
    background: #fff;
    width: 90%;
    max-width: 600px;
    margin-top: 100px auto 0;
    border-radius: 10px;
    padding: 30px;
}
.app h1{
    font-size: 25px;
    color: #001e4d;
    font-weight: 600;
    border-bottom: 1px solid #333;
    padding-bottom: 30px;
}
.quiz{
    padding: 20px 0;

}

.quiz h2{
     font-size: 18px;
     color: #001e4d;
     font-weight: 600;

}

.btn{
    background: #fff;
    color: #222;
    font-weight: 500;
    width: 100%;
    border: 1px solid#222;
    padding: 10px;
    margin: 10px auto 0 ;
    text-align: left;
    border-radius: 4px ;
    cursor: pointer;
    transition: all 0.3s;
}

.btn:hover{
  background: #222;
  color: #fff;
}

 #next-btn{
    background: #001e4d;
    color: #fff;
    font-weight: 500;
    width: 150px;
    border: 0;
    padding: 10px;
    margin: 20px auto 0 ;
    cursor: pointer;
    display: none;

 }