Some responsive improvements

Author: mattdangerw

theme/css/index.css

@@ -146,6 +146,7 @@ pre[class*="language-"] {
   margin: 0;
   padding: 2em 1.2em;
   text-shadow: none;
+  overflow-y: hidden;
 }
 
 code[class*="language-"] {
@@ -187,7 +188,6 @@ code[class*="language-"] * {
   }
 
   h1 {
-    line-height: 86.4px;
     font-size: 72px;
     font-weight: 700;
     margin: 0;

theme/css/nav.css

@@ -42,7 +42,9 @@ nav {
 .nav__search {
   display: none;
   max-width: 303px;
+  margin-left: 32px;
   position: relative;
+  flex-grow: 1;
 }
 
 .nav__search-form--mobile {
@@ -307,10 +309,6 @@ nav {
     display: none !important;
   }
 
-  .nav__search--input {
-    width: 303px;
-  }
-
   .nav__menu {
     align-items: center;
     display: flex;
@@ -329,6 +327,7 @@ nav {
     list-style-type: none;
     margin: 0;
     padding: 0;
+    white-space: nowrap;
   }
 
   .nav__item {