body {
    background-color: lightblue;
    font-family: Arial, sans-serif;
    text-align: center;
    margin-top: 50px;
}

h1 {
    color: darkblue;
}

form {
    background-color: white;
    width: 350px;
    margin: auto;
    padding: 25px;
    border: 2px solid darkblue;
    border-radius: 10px;
}

input[type="number"] {
    width: 90%;
    padding: 8px;
    margin: 8px 0 15px 0;
}

fieldset {
    margin: 10px 0 20px 0;
    padding: 15px;
    border: 1px solid gray;
}

button {
    background-color: darkblue;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
}

button:hover {
    background-color: navy;
    cursor: pointer;
}

h2 {
    color: darkblue;
}