trim space around masthead

_sass/minimal-mistakes/_masthead.scss

@@ -4,7 +4,7 @@
 
 .masthead {
   position: relative;
-  border-bottom: 1px solid $border-color;
+  border-bottom: 2px solid $border-color;
   -webkit-animation: $intro-transition;
   animation: $intro-transition;
   -webkit-animation-delay: 0.15s;
@@ -15,7 +15,7 @@
     @include clearfix;
     margin-left: auto;
     margin-right: auto;
-    padding: 1em;
+    padding: 0.5em;
     max-width: 100%;
     display: -webkit-box;
     display: -ms-flexbox;

_sass/minimal-mistakes/_page.scss

@@ -126,7 +126,7 @@
 
 .page__hero {
   position: relative;
-  margin-bottom: 2em;
+  margin-bottom: 0em;
   @include clearfix;
   -webkit-animation: $intro-transition;
   animation: $intro-transition;