downgrade to kirby v3

site/plugins/kirby-fields-block/index.css

@@ -0,0 +1,42 @@
+
+.k-block-fields-preview {
+  margin: -0.75rem;
+  overflow: hidden;
+  border-radius: var(--rounded);
+}
+.k-block-fields-preview .k-block-title {
+  padding: 0.75rem;
+  background: #f7f7f7;
+}
+.k-block-fields-preview:not([data-hidden="true"]) .k-block-title {
+  border-bottom: 1px solid rgba(0,0,0,.1);
+}
+.k-block-fields-preview .k-fields-block-toggle {
+  margin-left: auto;
+  cursor: pointer;
+}
+.k-block-fields-preview[data-hidden="true"] .k-fields-block-toggle {
+  transform: scaleY(-1);
+}
+.k-block-fields-preview .k-form {
+  padding: 1.25rem 1.5rem 1.5rem 1.5rem;
+}
+
+/**
+ * Reset `.k-layout-column .k-empty` overrides
+ */
+.k-block-fields-preview .k-empty {
+  position: static !important;
+  opacity: 1 !important;
+  align-items: stretch !important;
+  justify-content: flex-start !important;
+  color: #777 !important;
+  border: 1px dashed #ccc !important;
+  border-radius: 1px !important;
+}
+.k-block-fields-preview .k-empty[data-layout="cards"] {
+  justify-content: center !important;
+}
+.k-block-fields-preview .k-empty[data-layout="list"] .k-icon {
+  border-right: 1px solid rgba(0,0,0,.05) !important;
+}