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

body{
    min-height:100vh;
    background:
    radial-gradient(circle at top,
    #143c9a 0%,
    #071a45 70%);
    color:white;
}

.container{
    max-width:1000px;
    margin:auto;
    padding:30px 20px;
}

.header{
    text-align:center;
    margin-bottom:30px;
}

.header h1{
    font-size:48px;
    margin-bottom:10px;
}

.header p{
    color:#c5d4ff;
}

.progress{
    margin:20px 0;
    font-size:18px;
    text-align:center;
    color:#9db7ff;
}

.question-card{
    background:rgba(255,255,255,.06);
    backdrop-filter:blur(10px);

    border:1px solid rgba(255,255,255,.1);
    border-radius:25px;

    padding:30px;
    margin-bottom:20px;
}

.question{
    font-size:24px;
    font-weight:600;
    margin-bottom:25px;
    line-height:1.5;
}

.answers{
    display:flex;
    flex-direction:column;
    gap:15px;
}

.answer-btn{
    width:100%;
    padding:18px 20px;

    background:rgba(255,255,255,.05);
    border:1px solid rgba(255,255,255,.1);

    border-radius:15px;

    color:white;
    font-size:17px;
    text-align:left;

    cursor:pointer;
    transition:.3s;
}

.answer-btn:hover{
    background:rgba(255,255,255,.12);
    transform:translateY(-2px);
}

.answer-btn.selected{
    background:#2563eb;
    border-color:#3b82f6;
}

.navigation{
    display:flex;
    justify-content:space-between;
    margin-top:25px;
}

.nav-btn{
    padding:14px 28px;

    border:none;
    border-radius:12px;

    background:#2563eb;
    color:white;

    font-size:16px;
    font-weight:600;

    cursor:pointer;
}

.nav-btn:hover{
    background:#1d4ed8;
}

.finish-btn{
    width:100%;
    padding:18px;

    margin-top:20px;

    border:none;
    border-radius:15px;

    background:#16a34a;
    color:white;

    font-size:20px;
    font-weight:700;

    cursor:pointer;
}

.finish-btn:hover{
    background:#15803d;
}

.result-card{
    display:none;

    text-align:center;

    background:rgba(255,255,255,.06);
    border-radius:25px;

    padding:40px;
}

.result-card h2{
    font-size:42px;
    margin-bottom:20px;
}

.score{
    font-size:70px;
    font-weight:bold;
    color:#60a5fa;
    margin:20px 0;
}

.stats{
    font-size:22px;
    line-height:2;
}

.restart-btn{
    margin-top:25px;

    padding:15px 30px;

    border:none;
    border-radius:12px;

    background:#2563eb;
    color:white;

    font-size:18px;
    cursor:pointer;
}

.restart-btn:hover{
    background:#1d4ed8;
}

@media(max-width:768px){

    .header h1{
        font-size:34px;
    }

    .question{
        font-size:20px;
    }

    .answer-btn{
        font-size:15px;
    }

    .score{
        font-size:50px;
    }
}