body {
    font-family: Arial, sans-serif;
    background: url('/static/history-bg.jpg') no-repeat center center fixed;
    background-size: cover;
    margin: 0;
    padding: 0;
}
#quiz-container {
    max-width: 500px;
    margin: 50px auto;
    background: rgba(255, 255, 255, 0.5);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

button {
    margin: 5px 0;
    padding: 12px 0;
    width: 100%;
    font-size: 18px;
    cursor: pointer;
    border-radius: 5px;
    border: none;
    background: #f5f5f5;
    transition: background 0.2s;
}
button:active {
    background: #e0e0e0;
}

#github-link {
    position: absolute;
    top: 20px;
    left: 20px;
    color: #333;
    text-decoration: underline;
    background: rgba(255,255,255,0.7);
    padding: 6px 14px;
    border-radius: 5px;
    font-weight: bold;
    z-index: 1000;
    font-size: 16px;
}

.question-progress {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 18px;
    color: #333;
}

/* Responsive styles for mobile */
@media (max-width: 600px) {
    #quiz-container {
        max-width: 98vw;
        margin: 10vw 1vw;
        padding: 16px;
        border-radius: 0;
        box-shadow: none;
    }
    body {
        padding: 0;
        margin: 0;
        font-size: 16px;
    }
    .question-progress {
        font-size: 16px;
        margin-bottom: 12px;
    }
    h2 {
        font-size: 20px;
    }
    button {
        font-size: 16px;
        padding: 10px 0;
    }
    #github-link {
        top: 8px;
        left: 8px;
        font-size: 14px;
        padding: 4px 10px;
    }
}