Custom Style: Restore mainroad-style divider on site title

static/css/custom.css

@@ -0,0 +1,10 @@
+/* Site title - homepage header container */
+.header__container::after {
+  content: '';
+  display: block;
+  width: 100%;
+  height: 4px;
+  background: #e22d30;
+  margin: 15px auto 0;
+  border-radius: 0;
+}