* {
    margin: 0;
    padding: 0;
    font-family: 'poppins', sans-serif;
    box-sizing: border-box;
}

body{
    background: #fff;
}
.app{
    background: #fff;
    width:90%;
    max-width:600px;
    margin: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:600px;
}

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

.btn:hover:not([disabled]){
    background: rgb(27, 77, 70);
    color:#fff;
}
.btn:disabled{
    cursor:no-drop;
}
#next-btn{
    background:#001e4d;
    color:#fff;
    font-weight: 500;
    width:150px;
    border:0;
    padding:10px;
    margin:20px auto 0;
    border-radius:4px;
    cursor: pointer;
    display:block;
    display:none;
}

.correct{
    background: #9aeabc;
}

.incorrect{
    background: #ff9393;
}