Revert "sack off particles for now"

This reverts commit 959fab1581.

src/assets/styles/components/_banner.scss

@@ -60,6 +60,16 @@
     height: auto;
     min-height: 0;
 
+    .particles-js-canvas-el {
+      @include vendor('transition', 'opacity #{_duration(fadein)} ease-in-out');
+      @include vendor('transition-delay', '1s');
+      opacity: 1;
+
+      @include breakpoint(medium) {
+        display: none;
+      }
+    }
+
     h2 {
       font-size: 1.25em;
     }
@@ -84,5 +94,34 @@ body.is-loading {
         width: 0;
       }
     }
+
+    .particles-js-canvas-el {
+      opacity: 0;
+    }
   }
-}
+}
+
+.particle {
+  position: relative;
+  user-select: none;
+  background: _palette(accent3, bg);
+
+  @include breakpoint(medium) {
+    background: none;
+  }
+
+  .particles-js-canvas-el {
+    width: 100%;
+    height: 100%;
+  }
+
+  .content {
+      position: absolute;
+      top: 50%;
+      left: 50%;
+      -webkit-transform: translate(-50%, -50%);
+      transform: translate(-50%, -50%);
+      z-index: 1;
+      user-select: auto;
+    }
+}