Footer styles.

tool/xrpl.scss

@@ -64,7 +64,9 @@ h1, h2, h3, h4, h5 {
   font-weight: 700;
 }
 
-.landing section {
+.landing section,
+.xrpl-footer .card-grid,
+#main_content_wrapper {
   border-bottom: 1px solid map-get($theme-colors, primary);
 }
 
@@ -152,6 +154,21 @@ h1, h2, h3, h4, h5 {
     }
   }
 
+  &.card-grid-Nx1 {
+    /* 1 row of equal sized columns */
+    grid-auto-flow: column;
+    grid-auto-columns: 1fr;
+    grid-template-rows: auto;
+
+    /* No "hero" blocks expected here. */
+
+    @include media-breakpoint-down(md) {
+      /* Switch to 1-column layout on smaller widths */
+      grid-auto-flow: row;
+      grid-template-columns: 1fr;
+    }
+  }
+
   .card {
     padding: 40px;
     border: 0;