body {
    background-color: #FFFFCC;
    font-family: 'Arial', sans-serif;
}

h1 {
    color: green;
    text-align: center;
}

form {
    margin: 30px auto;
    padding: 20px;
    width: 800px;
    border: 4px solid blue;
    background-color: #AAEEFF;
}

.wynik {
    background-color: #FFFFFF;
    border: 3px solid green;
    margin: 20px auto;
    width: 800px;
    padding: 10px;
    color: green;
}

.error {
    background-color: #FFFFFF;
    border: 6px double red;
    margin: 20px auto;
    padding: 10px;
    width: 800px;
    color: red;
    font-weight: bold;
}
