White space tweaks for cards

apps/explorer_web/assets/css/_typography.scss

@@ -4,13 +4,13 @@ body {
 }
 
 h1 {
-  font-size: 18px;
-  font-weight: 400;
+  font-size: 26px;
+  font-weight: 200;
 }
 
 h2 {
   font-size: 18px;
-  font-weight: 400;
+  font-weight: 200;
 }
 
 h3 {

apps/explorer_web/assets/css/components/_card.scss

@@ -15,5 +15,9 @@
 
 .card-title {
   line-height: 2.2rem;
-  margin-bottom: 1rem;
+  margin-bottom: 2rem;
+}
+
+.card-body {
+  padding: 2.25rem 1.25rem;
 }

apps/explorer_web/lib/explorer_web/templates/address/overview.html.eex

@@ -26,7 +26,7 @@
     <div class="col-md-3">
       <div class="card bg-primary">
         <div class="card-body">
-          <h1 class="card-title text-white">Balance</h1>
+          <h2 class="card-title text-white">Balance</h2>
           <span></span>
           <div class="text-right">
             <h3 class="text-white"><%= balance(@address) %></h3>
@@ -38,7 +38,7 @@
     <div class="col-md-3">
       <div class="card">
         <div class="card-body">
-          <h1 class="card-title">Token Holdings</h1>
+          <h2 class="card-title">Token Holdings</h2>
           <div class="text-right mb-4">
             <h3><%= formatted_usd(@address, @exchange_rate) %></h3>
           </div>