body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background-color: #f0f0f0;
}
input, button {
    margin: 10px;
    padding: 10px;
    font-size: 16px;
}
input[type="number"], input[type="text"] {
    width: 200px;
}
button {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}
button:hover {
    background-color: #45a049;
}