Add base icon styles

_includes/icons.html

 <section>
   {% for icon in site.data.icons %}
     {% capture icon_path %}icons/{{ icon }}.svg{% endcapture %}
-    {% include_relative {{ icon_path }} %}
+    <div class="feather-icon">
+      {% include_relative {{ icon_path }} %}
+    </div>
   {% endfor %}
 </section>
\ No newline at end of file

style.scss

@@ -118,3 +118,18 @@ a {
     }
   }
 }
+
+.feather-icon {
+  display: inline-block;
+  width: 1.5rem;
+  height: 1.5rem;
+  stroke-width: 2px;
+
+  > svg {
+    width: 100%;
+    height: 100%;
+    stroke: currentColor;
+    stroke-width: inherit;
+  }
+}
+