adding css to force masthead to a set height when no logo present

source/_patterns/03-layouts/header/_header.scss

@@ -11,6 +11,7 @@ $site-name-bg: gesso-grayscale(gray-2);
     display: flex;
     font-family:gesso-font-family(condensedbook);
     margin-bottom:0;
+    min-height: 3.5rem;
     padding: gesso-spacing(xs);
     position: relative;
     transition: margin 300ms;
@@ -20,6 +21,7 @@ $site-name-bg: gesso-grayscale(gray-2);
     }
     @include medium{
       @include uw-contained-width;
+      min-height:inherit;
       padding: gesso-spacing(sm);
     }
 
@@ -27,7 +29,6 @@ $site-name-bg: gesso-grayscale(gray-2);
       align-self: flex-start;
       flex: 1;
     }
-
     .uw-header-menu {
       align-self: flex-end;
       margin-right:2.75rem;
@@ -37,7 +38,6 @@ $site-name-bg: gesso-grayscale(gray-2);
     }
     .uw-header-search {
       align-self: flex-end;
-
     }
     .uw-header-searchbar{
       @include uw-contained-width;