feat: Make more use of the shared assets

layout/templates/project.html

@@ -1,6 +1,6 @@
-<div class="horizontal-flex project-row">
+<div class="horizontal project-row">
   {{ template_if_empty item.screenshot layout/templates/no_screenshot.html layout/templates/screenshot.html }}
-  <div class="vertical-flex">
+  <div class="vertical">
     <h2>{{ item.title }}</h2>
     <p>{{ item.description }}</p>