supporters: Increase button border, add drop shadow and add grow animation

conservancy/supporters/templates/supporters/sustainers_paypal.html

@@ -14,6 +14,8 @@
 {% block content %}
 <h1 class="lh-title tc mt4">Become a Sustainer by PayPal</h1>
 
+<p class="tc"><em>You can become a Sustainer by Paypal here, or you can <a href="{% url 'sustainers' %}">donate via Stripe!</a></em></p>
+
 <div class="content-with-donate-sidebar" id="formStart">
 
 {% if partial_amount > 0 %}

conservancy/supporters/templates/supporters/sustainers_stripe.html

@@ -135,7 +135,7 @@
             </fieldset>
           </div>
 
-          <div class="mt3"><button type="submit" class="pointer btn f5 pv2" style="width: 100%; font-weight: bold; color: white; background-color: var(--orange); border-radius: 0.5rem; border: none; border-bottom: 2px solid rgba(0,0,0,0.1);">Click here to become a Sustainer by<br>Credit Card or <abbr title="US Bank Direct Debit">ACH</abbr></button></div>
+          <div class="mt3"><button type="submit" class="pointer btn f5 pv2 grow shadow-5" style="width: 100%; font-weight: bold; color: white; background-color: var(--orange); border-radius: 0.5rem; border: none; border-bottom: 4px solid rgba(0,0,0,0.1);">Click here to become a Sustainer by<br>Credit Card or <abbr title="US Bank Direct Debit">ACH</abbr></button></div>
         </fieldset>
       </form>