Remove box-shadow and make bg-color match table (#598)

frontend/src/components/Chain/Chain.css

@@ -30,5 +30,4 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
   min-height: 100%;
   background: #2c2b2b;
   color: #fff;
-  box-shadow: rgba(0, 0, 0, 0.5) 0 3px 30px;
 }

frontend/src/components/Chain/Header.css

@@ -24,6 +24,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
   color: #000;
   min-width: 1350px;
   position: relative;
+  background: linear-gradient(0deg, rgba(0,0,0,0.2) 0%, rgb(255, 255, 255) 17%), white;
 }
 
 .Header-tabs {

frontend/src/index.css

@@ -21,6 +21,10 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
   box-sizing: border-box;
 }
 
+html, body {
+  background-color: #2c2b2b;
+}
+
 body {
   margin: 0;
   padding: 0;