RSVP html and CSS

CSS Question
THe event RSVP form appears centered in my events page with labels misaligned. When I copy the Events Made Easy css below to my child theme it corrects the alignment problem but breaks my theme (Hueman latest). THis is probably an elementary newbie css question but I’m lost.

table.eme-rsvp-form  {
	width: 80%;
}
table.eme-rsvp-form th {
	text-align: left;
	width: 100%;
}

table.eme-rsvp-form td {
	padding-left: 1em;
	text-align: left;
}

HTML Question:
How best to expand the maxlength on the RSVP form entry fields. Do I just edit eme_rsvp.php and change the form html accordingly?

Any suggestions appreciated.
THanks.

http://ww.wp.xz.cn/plugins/events-made-easy/