reduce minimum height of masthead

_sass/_masthead.scss

@@ -1,8 +1,8 @@
 .site-masthead {
   background: $brand-color;
   box-sizing: border-box;
-  min-height: 100vh;
-  padding: 6em 2em;
+  min-height: 50vh;
+  padding: 8em 2em;
   position: relative;
 
   display: flex;