Move blog.css styles to styles/blog/ files

assets/styles/blog/050_content.css

@@ -0,0 +1,19 @@
+/* Eryn Wells <eryn@erynwells.me> */
+
+a:has(> img) {
+  grid-column: content-start / content-end;
+}
+
+@media (max-width: 639px) {
+  a:has(> img) {
+    grid-column: gutter-start / gutter-end;
+  }
+}
+
+main {
+  gap: var(--body-item-spacing) 0;
+}
+
+main > article > :not(:last-child) {
+    margin-block-end: var(--body-item-spacing);
+}