body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background-color: #f0f0f0;
}

h1 {
    color: #333;
}

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

li {
    background: #fff;
    margin: 5px 0;
    padding: 10px;
    width: 200px;
    text-align: center;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
}

input[type="text"] {
    padding: 10px;
    width: 180px;
    margin-right: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    padding: 10px 15px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}