body {
    font-family: Arial, sans-serif;
    max-width: 500px;
    margin: 50px auto;
    padding: 20px;
}

form {
    display: grid;
    gap: 10px;
}

input[type="number"] {
    padding: 8px;
    font-size: 1rem;
}

button {
    padding: 10px 14px;
    cursor: pointer;
}