style fixes for multiple site display

index.html

@@ -116,7 +116,8 @@
             #sites-data-container .site-data-container {
                 display: flex;
                 flex-direction: column;
-                align-items:flex-start;
+                align-items:center;
+                width:23em;
             }
             footer {
                 font-size: 70%;
@@ -155,16 +156,17 @@
             }
             #add-site-container {
                 order:99;
+                width:0px;
+                height:0px;
             }
             #add-site {
                 font-size: 250%;
                 text-decoration: none;
                 border: dotted 1px springgreen;
                 width: 1em;
-                height: 0.98em;
+                height: 0.97em;
                 display: inline-block;
                 line-height: 90%;
-                margin-left:0.5em;
                 outline:none;
                 text-align: Center;
                 margin-top: 0.47em;
@@ -183,6 +185,7 @@
         </div>
         <div class="sources"><a href="https://en.wikipedia.org/wiki/2019%E2%80%9320_coronavirus_pandemic">source</a></div>
         <div id="sites-data-container">
+            <div id="add-site-container"><a href="#add-site" id="add-site">+</a></div>
             <div class="site-data-container">
                 <h2><select class="sites-select" tabindex="1">
                     <option value="select one">(select an area)</option>
@@ -190,7 +193,6 @@
                 <div class="site-data">
                 </div>
             </div>
-            <div id="add-site-container"><a href="#add-site" id="add-site">+</a></div>
         </div>
         <p><strong>Disclaimer:</strong> this is all back-of-the-napkin math using data from Wikipedia. Take with a grain (or preferably, a spoonfull) of salt. Check your own sources; some great resources: <a href="http://covid.hi.is/">University of Iceland's COVID data model</a> (and its <a href="https://github.com/bgautijonsson/covid19/">sources</a>).</p>
         <footer>