html , body{
    height:100%;
    margin:0;
    padding:0;
}

body{
    background-image: url("oneback.jpg");
    background-size:cover;
    background-position:center;
    background-repeat: no-repeat;
    display:flex;
    justify-content:center;
    align-items:center;
}

.quiz-container {
    transform:scale(0.8);
    background: rgb(55, 109, 226);
    border-radius:20px;
    padding:30px;
    box-shadow:0 20px 40px rgb(0,0,0,0.1);
    max-width: 600px;
    width:90%;
    text-align:center;
}

.quiz-header {
    margin-bottom:30px;

}

.quiz-title {
    font-size: 2.5rem;
    color:black;
    margin-bottom: 20px;

}

.question-counter {
    font-size:1.2rem;
    color:black;
    margin-bottom:20px;
}

.progress-bar {
    width:100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow:hidden;
    margin-bottom:30px;
}

.progress-fill{
    height:100%;
    background: linear-gradient(90deg, #667eea,#764ba2);
    transition: width 0.3s ease;
}

.question {
    font-size: 1.5rem;
    color:#333;
    margin-bottom:30px;
    line-height:1.6;

}

.answers {
    display:grid;
    gap:15px;
    margin-bottom:30px;
}


.answer-btn {
    padding:15px 20px;
    border: 2px solid #e0e0e0;
    border-radius:10px;
    background:white;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align:left;
}


.answer-btn:hover {
    border-color: #667eea;
    background:#f8f9ff;
    transform:translateY(-2px);
}


.answer-btn.selected {
    border-color: #667eea;
    background: #667eea;
    color:white;

}

.next-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color:white;
    border:none;
    padding: 15px 40px;
    border-radius:25px;
    font-size:1.2rem;
    cursor:pointer;
    transition: all 0.3s ease;
    opacity:0.5;
    pointer-events:none; 
}

.score-display {
    font-size: 1.2rem;
    color:#333;
    margin-top:10px;
    font-weight:bold;
    font-weight:bold;
}


.next-btn.active {
    opacity: 1;
    pointer-events:auto;

}


.next-btn:hover.active{
    transform:translateY(-2px);
    box-shadow: 0 10px 20px rgba(69,108,165,0.3);
}


@keyframes victoryReveal {

    0% {
        opacity:0;
        transform:scale(0.5) rotate(180deg);
    }

    50% {
        opacity:1;
        transform:scale(1);
    }

    100% {
        opacity:1;
        transform:scale(1);

    }

}

@keyframes fadeInUp {
    0% {
        opacity:0;
        transform: translateY(50px);

    }

    100% {
        opacity:1;
        transform:translateY(0);

    }
}


.victory-glow {
    animation: victoryGlow 2s ease-in-out infinite alternate;
}

@keyframes victory-glow {
    0% {
        text-shadow: 0 0 20px #0ff000, 0 0 40px #0ff000, 0 0 60px #00ff00, 2px 2px 4px rgba(0,0,0,0.8);
    }

    100% {
        text-shadow: 0 0 30px #00ff00, 0 0 60px #00ff00, 0 0 90px #00ff00, 2px 2px 4px rgba(0,0,0,0.8);
    }
}