adding basic nav styles

opentech/static_src/src/sass/components/_nav.scss

@@ -85,20 +85,8 @@
             width: auto;
             padding: 0;
             margin: 0;
-            font-weight: $weight--light;
             text-align: left;
             border-bottom: 0;
-
-            &::after {
-                color: $color--tertiary;
-                content: '|';
-            }
-
-            &:last-of-type {
-                &::after {
-                    content: '';
-                }
-            }
         }
 
         &--secondary {
@@ -154,7 +142,7 @@
     }
 
     &__link {
-        color: rgba($color--black, 0.7);
+        color: $color--white;
         border-bottom: 1px solid transparent;
         transition: color, border $transition;
 
@@ -170,9 +158,7 @@
         }
 
         @include media-query(tablet-portrait) {
-            padding: 5px 0;
             margin: 0 10px;
-            color: $color--secondary;
         }
 
         &--breadcrumb {