Change Style for Logo in AMP mode (Text Logo)

/* Change Style for Logo in AMP mode (Text Logo) */
function change_style_for_text_logo_in_amp() {
    ?>
    .amp-wp-header .jeg_mobile_logo {
        background-image: unset;
        font-size: 24px;
        color: grey;
        margin-top: 14px;
    }
    @media
    only screen and (-webkit-min-device-pixel-ratio: 2),
    only screen and (     -o-min-device-pixel-ratio: 2/1),
    only screen and (        min-device-pixel-ratio: 2),
    only screen and (                min-resolution: 192dpi),
    only screen and (                min-resolution: 2dppx) {
        .amp-wp-header .jeg_mobile_logo {
            background-image: unset;
        }
    }
    <?php
}
add_action( 'amp_post_template_css', 'change_style_for_text_logo_in_amp' );