body {
    background-color: black;
    color: white;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container, .question-container {
    text-align: center;
    max-width: 600px;
    transition: opacity 1s ease-in-out;
}

.container {
    opacity: 1;
}

.question-container {
    opacity: 0;
    visibility: hidden;
}

h1 {
    font-size: 2em;
    margin-bottom: 20px;
}

p {
    margin-bottom: 20px;
}

button {
    background-color: transparent;
    border: 1px solid #00aaff;
    color: #00aaff;
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
}

button:hover {
    background-color: #00aaff;
    color: black;
}

.footer-note {
    margin-top: 20px;
    font-size: 0.8em;
    color: gray;
}

.screen {
    display: none;
}

.screen.active {
    display: block;
    opacity: 0;
    animation: fadeIn 0.6s forwards;
    transition: 0.9s ease;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

ul {
    list-style: none;
    padding: 0;
}

li {
    padding: 10px;
    border: 1px solid white;
    margin: 10px 0;
    cursor: pointer;
}

.progress-bar {
    width: 100%;
    background-color: #333;
    margin-top: 20px;
    height: 10px;
}

.progress {
    height: 100%;
    width: 0;
    background-color: #00aaff;
    transition: width 1s ease-in-out;
}

#congratulations-screen h2 {
    font-size: 2em;
    margin-bottom: 20px;
}