body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.4;
    margin: 0;
    padding: 10;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px;
}

#quizContainer {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    margin-bottom: 15px;
}

.option {
    display: block;
    padding: 8px 12px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.95em;
}

.option:hover {
    background-color: #e9ecef;
}

.option.selected {
    background-color: #007bff;
    color: white;
}

.option.correct {
    background-color: #28a745;
    color: white;
}

.option.wrong {
    background-color: #dc3545;
    color: white;
}

#feedback {
    padding: 10px;
    border-radius: 5px;
    display: none;
    margin: 10px 0;
    font-size: 0.95em;
}

#explanation {
    padding: 12px;
    background-color: #e9ecef;
    border-radius: 5px;
    display: none;
    margin: 10px 0;
    font-size: 0.9em;
}

@media (max-width: 768px) {
    body {
        font-size: 15px;
    }
    
    .container {
        padding: 8px;
        max-width: 100%;
    }
    
    #quizContainer {
        padding: 12px;
        margin: 5px;
    }
    
    .option {
        padding: 8px 10px;
        margin: 6px 0;
    }
    
    h4 {
        font-size: 1.1em;
        margin: 8px 0;
    }
    
    .h5 {
        font-size: 1em;
        margin: 8px 0;
    }
    
    #feedback, #explanation {
        padding: 8px;
        margin: 8px 0;
    }
}