Text 'comment' outside the reply box

Hello,

When you start a new comment, the text ‘Comment’ appears on the comment box until you start writing (that’s ok). The problem is, that the text sticks out to the left side, and the ‘C’from ‘Comment’ is outside the box…

The site is at: http://wordpressroger.hol.es/main-page-2/

Thanks in advance !