update styling to improve readability and distinction of the three tiers

Author: TatsatJha

_includes/org-card-group.html

@@ -1,6 +1,6 @@
 <div class="row justify-content-center">
     {%- for item in org_tier -%}
-    <div class="col-6 col-md-4 align-self-center p-1">
+    <div class="p-4 col-6 col-md-4 align-self-center p-1">
         {% include org-member-card.html %}
     </div>
     {%- endfor -%}

pages/get_involved/organizational_membership.md

@@ -182,24 +182,28 @@ Table 3: Membership fees
 
 
 {% if site.data.org-members.premier %}
-### Premier Level
+### Premier Level ($2000 - $10000)
+
+---
 
 {% assign org_tier = site.data.org-members.premier | sort: "date_joined" %}
 {% include org-card-group.html %}
 {% endif %}
 
 
 {% if site.data.org-members.standard %}
-### Standard Level
+### Standard Level ($1000 - $5000)
 
+---
 {% assign org_tier = site.data.org-members.standard | sort: "date_joined" %}
 {% include org-card-group.html %}
 {% endif %}
 
 
 {% if site.data.org-members.basic %}
-### Basic Level
+### Basic Level ($500 - $1000)
 
+---
 {% assign org_tier = site.data.org-members.basic | sort: "date_joined" %}
 {% include org-card-group.html %}
 {% endif %}