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

body{

    background:#f4f6fb;

    display:flex;
    justify-content:center;
    align-items:center;

    height:100vh;

}

.quiz-container{

    width:600px;

    background:white;

    padding:30px;

    border-radius:12px;

    box-shadow:0 8px 20px rgba(0,0,0,.15);

}

h1{

    text-align:center;

    margin-bottom:20px;

}

#question{

    margin-bottom:20px;

}

.answer{

    display:block;

    width:100%;

    margin:10px 0;

    padding:12px;

    border:none;

    background:#2563eb;

    color:white;

    border-radius:8px;

    cursor:pointer;

    transition:.3s;

}

.answer:hover{

    background:#1d4ed8;

}

.correct{

    background:green!important;

}

.wrong{

    background:red!important;

}

#feedback{

    margin:15px 0;

    font-weight:bold;

}

#nextBtn{

    padding:12px 20px;

    border:none;

    background:#0f172a;

    color:white;

    border-radius:8px;

    cursor:pointer;

    display:none;

}

.hidden{

    display:none;

}

#result{

    text-align:center;

}

#score{

    font-size:22px;

    margin:20px 0;

}