css error on validator

Hi, I start use sparky on my web site camart.us
but when I vheck validat there is 1 error and 1 warrning.

error is in this page.
jigsaw.w3.org/css-validator/validator?uri=camart.us&profile=css3&usermedium=all&warning=1&vextwarning=&lang=el

how can I fix this?

You can edit:

templates/sparky_framework/css/layout.css

to remove:

-webkit-appearance: button;

because that is visible only on chrome browser

ok. i find the main problem.
the problem is in sparky_framework/index.php

Content-type: text/css; charset: UTF-8");

it should be

Content-type: text/css; charset= UTF-8");now my web ite is working 0 error
thanks for sparky