/* Basis layout voor desktop */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    text-align: center;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 20px 0;
}

h1, h2 {
    margin: 0.5em 0;
}

#calculator {
    margin: 20px auto;
    width: 300px;
}

label {
    display: block;
    margin: 10px 0;
}

input, button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    font-size: 1.1em;
}

#results p {
    font-size: 1.2em;
}

#affiliates {
    margin: 20px auto;
    width: 80%;
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
}

footer {
    margin-top: 40px;
    background-color: #333;
    color: white;
    padding: 10px 0;
}

/* Aanpassingen voor mobiele apparaten */
@media only screen and (max-width: 600px) {
    header {
        padding: 15px 0;
    }

    h1 {
        font-size: 1.8em;
    }

    h2 {
        font-size: 1.5em;
    }

    #calculator {
        width: 90%;
        padding: 10px;
    }

    input, button {
        font-size: 1em;
        padding: 12px;
    }

    #results p {
        font-size: 1.1em;
    }

    #affiliates {
        width: 95%;
        padding: 15px;
    }

    footer {
        padding: 15px 0;
        font-size: 0.9em;
    }
}