body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #fff;
    text-align: center;
}

header {
    background: #ff0000;
    padding: 20px;
}

h1, h2 {
    color: #fff;
}

main {
    padding: 20px;
}

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

ul li {
    background: #222;
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
    text-align: left;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

button {
    background: #ff0000;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    margin: 10px;
    border-radius: 5px;
}

button:hover {
    background: #cc0000;
}

footer {
    background: #222;
    padding: 10px;
    margin-top: 20px;
}

footer p {
    font-size: 14px;
}