.quiz-container {
    max-width: 100%;
    margin: auto;
    padding: 20px;
}

.quiz-title {
    font-size: 2em;
    text-align: center;
    color: #333;
}

.progress-bar {
    width: 100%;
    background-color: #f3f3f3;
    border-radius: 25px;
    overflow: hidden;
    margin: 20px 0;
}

.progress {
    height: 20px;
    background-color: #4caf50;
    width: 0%;
    animation: progress-animation 2s;
}

@keyframes progress-animation {
    from { width: 0%; }
    to { width: 100%; }
}

.button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: #008cba;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

.button:hover {
    background-color: #005f7a;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
}

.dark-mode {
    background-color: #121212;
    color: #ffffff;
}

@media (max-width: 600px) {
    .quiz-title {
        font-size: 1.5em;
    }
    .button {
        width: 100%;
    }
}