remove border from login when using shortcode

On this page: http://wordpress.org/plugins/login-with-ajax/other_notes/, it explains how to format the box. I did the thing about a child theme (because I have one) and it mostly works. If you don’t have a child theme, you can edit the CSS directly. What worked most simply was to change the border color to white (my background color), because my theme has its own rules about table borders.

.lwa { margin-bottom:10px; }
form.lwa-form, form.lwa-remember, div.lwa-register form { position:relative; }
.lwa table { width:100% !important; margin:0px !important; border-spacing:0; border-collapse:collapse; border-color:white; }
.lwa td,.lwa th { padding:0; border-spacing:0; border-color:white; }
.lwa td { padding-top:7px; vertical-align:top; background-color:none; border-color:white; }

If you don’t know how to edit the css, maybe you shouldn’t be doing this, though.