body {
    font-family: Arial, sans-serif;
    text-align: center;
}

h1 {
    color: #2c3e50;
}

button {
    margin: 10px;
    padding: 10px 20px;
    cursor: pointer;
}

ul {
    list-style-type: none;
}

li {
    margin: 10px 0;
}

a {
    color: blue;
    text-decoration: none;
}