[Doitsu]

@Macsurfcat: AFAIK, Kindle media queries usually need to be used in pairs (amzn-mobi and amzn-kf8) to work as designed.

For example, the following works fine:

@media amzn-mobi {
    span.firstletter {
        font-size: 3em;
        font-weight: bold;
        color: teal;
    }
}

@media amzn-kf8 {
    span.firstletter {
        font-family: sans-serif;
        float: left;
        font-size: 4em;
        font-weight: bold;
        margin-top: -0.2em;
        margin-bottom: -0.2em;
        margin-right: 5px;
        color: red;
    }
}

<h3>Media query test</h3>

<p><span class="firstletter">L</span>orem ipsum dolor sit amet, consectetur adipiscing elit.</p>