.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

input[type="text"], button {
    display: block;
    margin-bottom: 10px;
}

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

li {
    margin-bottom: 5px;
    font-size: 16px;
}