minor style

assets/style.less

@@ -26,6 +26,7 @@ html, body {
   background-color: #111;
   overflow-y: auto;
   scrollbar-width: thin;
+  scrollbar-color: #555 #111;
   padding: 0 !important;
 }
 
@@ -51,6 +52,7 @@ p {
 }
 
 #content {
+  max-width: 1400px;
   flex-grow: 1;
   width: 100%;
   margin: 0 auto;