change the readmore button to a readmore link.

Hi there,

Give this a shot:

a.wp-show-posts-read-more, 
a.wp-show-posts-read-more:visited,
a.wp-show-posts-read-more:hover,
a.wp-show-posts-read-more:focus {
    display: inline;
    padding: 0;
    font-size: 1em;
    border: 0;
    background-color: inherit !important;
    color: inherit !important;
}

Then just adjust the color as needed.