add contact heading styles

site/layouts/partials/contact.html

@@ -1,6 +1,6 @@
 <article id="contact" class="l-relative l-screen-min-full contact-bg">
   <div class="l-section-pad l-wrapper">
-    <h2>Contact Us</h2>
+    <h2 class="l-section-header contact-heading">Contact Us</h2>
     <p class="h5">Complete this form and we will get back to you within one working day.</p>
     <form action="https://mailthis.to/remailthis" method="POST" encType="multipart/form-data">
       <ul class="u-no-list">

src/css/main.css

@@ -242,6 +242,11 @@ html.is-animating .transition-fade {
   background-color: var(--primary-100);
 }
 
+.contact-heading {
+  text-align: left;
+  margin-bottom: 1.25rem;
+}
+
 // global
 
 .site-title {