CSS file not working

I’ve spent hours on this. I’m sure it’s simple to someone, but I’m a WordPress virgin.

Changes to my file in the child theme doesn’t work. Spoke to my host, they don’t see any problems. Please help. Here’s my css code…

/*
Theme Name: Twenty Thirteen Child
Theme URI: https://eco-act.org/twenty-thirteen-child/
Description: Twenty Thirteen Child Theme
Author: Joe Eckloff
Author URI: https://eco-act.org
Template: twentythirteen
Version: 1.0.0
Tags: light, dark, two-columns, right-sidebar, responsive-layout, accecssibnility-ready
Text Domain: twenty-thirteen-child
*/

@import url("../twentythirteen/style.css");

p {
font-family: Verdana;
color: #594a41;
font-weight: 400;
font-style: normal;
line-height: 1.4;
font-size: 32px;
}

.site {
background-color: #333;
border-left: 1px solid #f2f2f2;
border-right: 1px solid #f2f2f2;
margin: 0 auto;
max-width: 1600px;
width: 100%;
}

URL is eco-act.org