Line Showing Up on Individual Pages

Good morning!

I love this theme! I am almost ready to hand this site over to a client but cannot get this horizontal grey line to disappear from every individual page (not on home page). I have removed every custom CSS item, saved, viewed, and nothing is working. It scrolls with the background and text but I know it is not on the background image. Anyone have any ideas?

Site: https://www.rkausa.com and it’s on any of the pages listed in the navigation. Please help, if possible!

Here is the CSS I have in the custom area:

.page .entry-title {
display: none;
border: none !important;
background: none;}?

h1, h2, h3, h4, h5, h6 {
text-shadow: 0 0px 0 transparent;}

header.tc-header {
background:-color: #fafafa;
border: none !important;}

h1{
font-family: Open Sans;
text-transform: uppercase;
font-size: 55px;
color: #fafafa;}

h2 {
font-family: Open Sans;
font-weight: bold;
font-size: 20px;
color: #fafafa;}

h3 {
font-family: Open Sans;
font-size: 18px;
color: #D0D2D3;}

.round-div {
border: none;}

.navbar .nav > li > a, .navbar .nav > li > a:first-letter,
.navbar .nav > li.current-menu-item > a,
.navbar .nav > li.current-menu-ancestor > a {
display: inline;
color: #D90000;
font-family: Open Sans;
font-size: 1.2em;
text-transform: uppercase;
border: none !important;}

body {
background: url(https://rkausa.com/wp-content/uploads/2015/03/Purple-Backgrond1.jpg) repeat 0 0 ;}

#main-wrapper {
margin-top: 140px;
margin-bottom: 50px;
color: #D0D2D3;}

p {
line-height: 1.5;}

.zoom_img img{
height:150px;
width:150px;
-moz-transition:-moz-transform 0.5s ease-in;
-webkit-transition:-webkit-transform 0.5s ease-in;
-o-transition:-o-transform 0.5s ease-in;}
.zoom_img img:hover{
-moz-transform:scale(1.5);
-webkit-transform:scale(1.5);
-o-transform:scale(1.5);}

.nav {
padding: 15px 35px 5px 16px;}

.navbar .nav > li > a, .navbar .nav > li > a:first-letter {
color: #5d5d5d;}

.navbar .nav > li > a:hover, .navbar .nav > li > a:hover:first-letter {
color: #FFF;
text-shadow: #303174 0 0 10px;}