body.dark-mode {
    background-color: #121212;
    color: #ffffff;
    font-family: Arial, sans-serif;
}

.container {
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    text-align: center;
}

button {
    background-color: #6200ea;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background-color: #3700b3;
}

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

li {
    margin: 10px 0;
}