Replace Sass with PostCSS, include imports and nesting

assets/css/components/markdown.css

@@ -0,0 +1,28 @@
+.markdown {
+    h2 {
+        @apply mt-8 mb-3 text-black;
+    }
+
+    h2, h3 {
+      @apply text-black;
+    }
+
+    p:last-child {
+        @apply mb-0;
+    }
+
+    p code,
+    li code {
+        @apply bg-grey-lighter inline-block font-mono text-sm px-1 py-px;
+    }
+
+    pre code,
+    .hljs {
+        @apply bg-grey-lighter block border-grey-dark border-l-4 font-mono leading-loose overflow-x-scroll p-6 rounded text-sm;
+    }
+}
+
+.markdown p a,
+.markdown li a {
+  @apply link;
+}