.debug {
   border-width: 25px;
   border-color: orange;
   border: solid;
}

/* From http://old.marcofolio.net/css/css_trick_debug_your_html_and_css.html */
* *:hover { border:2px solid #89A81E }                   /* Solid Green */
* * *:hover { border:2px solid #F34607 }                 /* Solid Orange */
* * * *:hover { border:2px solid #5984C3 }               /* Solid Blue */
* * * * *:hover { border:2px solid #CD1821 }             /* Solid Red */
* * * * * *:hover { border:2px dotted #89A81E }          /* Dotted Green */
* * * * * * *:hover { border:2px dotted #F34607 }        /* Dotted Orange */
* * * * * * * *:hover { border:2px dotted #5984C3 }      /* Dotted Blue */
* * * * * * * * *:hover { border:2px dotted #CD1821 }    /* Dotted Red */