getting this on GH

_sass/layout.scss

@@ -73,12 +73,21 @@
 }
 
 .page-header {
-  border-bottom: $border $border-color;
+  background-color: $grey-lt-000;
 
   @include mq(md) {
-    .main-content {
+    background-color: $white;
+    border-bottom: $border $border-color;
+
+  }
+
+  .main-content {
+    padding-top: 0;
+
+    @include mq(md) {
       display: flex;
       justify-content: space-between;
+      padding-top: $sp-4;
     }
   }
 }

_sass/navigation.scss

@@ -23,7 +23,7 @@
   list-style: none;
 
   @include mq(md) {
-    margin-top: $sp-8;
+    margin-top: $sp-10;
   }
 }
 
@@ -71,7 +71,8 @@
 
 // Small screen nav
 
-.main-nav {
+.main-nav,
+.aux-nav {
   display: none;
 
   &.nav-open {

_sass/search.scss

@@ -9,6 +9,7 @@
     position: relative;
     z-index: 99;
     display: block;
+    flex-grow: 1;
     padding-top: $sp-1;
     padding-bottom: $gutter-spacing / 2;
   }
@@ -35,7 +36,7 @@
 }
 
 .search-input {
-  width: 200px;
+  width: 100%;
   padding-top: $sp-1;
   padding-bottom: $sp-1;
   border-top: 0;