app/views/shared/widgets/_stat_card.html.erb
<div class="col-12 col-sm-6 col-lg-3">
<div class="card-metric">
<div class="metric">
<% if local_assigns[:icon].present? %>
<p class="metric-value h3 <%= color %>">
<sub><i class="<%= icon %>"></i></sub> <span class="value"><%= value %></span>
</p>
<% else %>
<p class="metric-value h2"><%= value %></p>
<% end %>
<h2 class="metric-label"><%= label %></h2>
</div>
</div>
</div>