Problems with height of button

Hi – this is a great plugin – thanks a lot. I have one little annoying problem: I have changed the code to this :

<a class="brun-btn" href="<?php echo esc_url( add_query_arg( 'pdf', $post->ID ) );?>" target="_blank"> <?php echo wp_kses_post($pdfbutton_text);?></a>

Unfortunately the button becomes higher than my other instances of “brun-btn” – i have tried making a special css for this button – setting padding to 0 – but the button insists on having a fixed heigth