Adjust header margins and padding

src/assets/css/librarybrowser.css

@@ -115,7 +115,7 @@
     display: -webkit-inline-box;
     display: -webkit-inline-flex;
     display: inline-flex;
-    margin: 0.3em 0 0 0.5em;
+    margin: 0 0 0 0.5em;
     height: 1.7em;
     -webkit-box-align: center;
     -webkit-align-items: center;
@@ -273,6 +273,25 @@
 }
 
 @media all and (min-width: 84em) {
+    .headerTop {
+        padding: 1.25em 1.25em;
+    }
+
+    .headerTabs {
+        -webkit-align-self: center;
+        align-self: center;
+        width: auto;
+        -webkit-box-align: center;
+        -webkit-align-items: center;
+        align-items: center;
+        -webkit-box-pack: center;
+        -webkit-justify-content: center;
+        justify-content: center;
+        margin-top: -3em;
+        position: relative;
+        top: -1.05em;
+    }
+
     .libraryPage:not(.noSecondaryNavPage) {
         padding-top: 4.6em !important;
     }
@@ -426,7 +445,7 @@
 
 .desktopMiscInfoContainer {
     position: absolute;
-    bottom: .75em
+    bottom: 0.75em;
 }
 
 .layout-mobile .detailPagePrimaryContainer {