Tidy up crop predictions display

app/assets/stylesheets/overrides.sass

@@ -41,7 +41,6 @@ h3
 .profile-sidebar
   margin-top: -5rem
   .avatar
-    border-radius: 50%
     border-radius: 50%
     z-index: 2
     position: relative

app/assets/stylesheets/predictions.sass

@@ -1,10 +1,14 @@
 .predictions
-  .metric
+  .prediction-metric
+    text-align: center
     height: 180px
     border: 1px solid lighten($green, 20%)
+    border-radius: 5%
     background: $white
     margin: 4px
     strong
-      font-size: 250%
+      font-size: 4em
       font-align: center
     h3
+    span
+      display: block

app/views/crops/_predictions.html.haml

@@ -12,24 +12,21 @@
             = link_to 'https://en.wikipedia.org/wiki/Annual_vs._perennial_plant_evolution' do
               an annual crop
             (living and reproducing in a single year or less)
-
   .row
     - if crop.annual? && crop.median_lifespan.present?
-      .metric.col-md-3.col-xs-5
+      .prediction-metric.col-md-3.col-xs-5
         %h3 Median lifespan
         %strong= crop.median_lifespan
         %span days
 
     - if crop.median_days_to_first_harvest.present?
-      .metric.col-md-3.col-xs-5
+      .prediction-metric.col-md-3.col-xs-5
         %h3 First harvest expected
         %strong= crop.median_days_to_first_harvest
-        %span days
-        after planting
+        %span days after planting
 
     - if crop.annual? && crop.median_days_to_last_harvest.present?
-      .metric.col-md-3.col-xs-5
+      .prediction-metric.col-md-3.col-xs-5
         %h3 Last harvest expected
         %strong= crop.median_days_to_last_harvest
-        %span days
-        after planting
+        %span days after planting