diff --git a/.changeset/preview-theme-borders.md b/.changeset/preview-theme-borders.md
new file mode 100644
index 00000000..fafada95
--- /dev/null
+++ b/.changeset/preview-theme-borders.md
@@ -0,0 +1,5 @@
+---
+"@frontlit/preview": patch
+---
+
+Give borders the theme's border colour, as published sites do. Cards, dividers and the header border used to render in the text colour.
diff --git a/.changeset/text-editor-tiptap-ranges.md b/.changeset/text-editor-tiptap-ranges.md
new file mode 100644
index 00000000..ed2ccaf5
--- /dev/null
+++ b/.changeset/text-editor-tiptap-ranges.md
@@ -0,0 +1,5 @@
+---
+"@frontlit/text-editor": patch
+---
+
+Use one version range (`^3.31.3`) for every `@tiptap/*` dependency. Three packages were pinned to exactly 3.31.3 while the rest floated, so a fresh npm install pulled two copies of `@tiptap/core` and `@tiptap/extension-table` crashed with "does not provide an export named 'isValidCSSStyleValue'". This broke `npx @frontlit/preview@alpha`.
diff --git a/bun.lock b/bun.lock
index 7377621a..2fbe3d36 100644
--- a/bun.lock
+++ b/bun.lock
@@ -298,24 +298,24 @@
       "version": "0.1.0-alpha.4",
       "dependencies": {
         "@floating-ui/dom": "^1.6.0",
-        "@tiptap/core": "^3.0.0",
-        "@tiptap/extension-bubble-menu": "^3.10.4",
-        "@tiptap/extension-code": "3.31.3",
-        "@tiptap/extension-code-block": "3.31.3",
-        "@tiptap/extension-code-block-lowlight": "^3.0.0",
-        "@tiptap/extension-dropcursor": "^3.0.0",
-        "@tiptap/extension-gapcursor": "^3.0.0",
-        "@tiptap/extension-heading": "^3.0.0",
-        "@tiptap/extension-highlight": "^3.11.0",
-        "@tiptap/extension-image": "^3.0.0",
-        "@tiptap/extension-link": "^3.0.0",
-        "@tiptap/extension-placeholder": "^3.0.0",
-        "@tiptap/extension-table": "^3.10.7",
-        "@tiptap/extensions": "3.31.3",
-        "@tiptap/pm": "^3.0.0",
-        "@tiptap/react": "^3.0.0",
-        "@tiptap/starter-kit": "^3.0.0",
-        "@tiptap/static-renderer": "^3.10.7",
+        "@tiptap/core": "^3.31.3",
+        "@tiptap/extension-bubble-menu": "^3.31.3",
+        "@tiptap/extension-code": "^3.31.3",
+        "@tiptap/extension-code-block": "^3.31.3",
+        "@tiptap/extension-code-block-lowlight": "^3.31.3",
+        "@tiptap/extension-dropcursor": "^3.31.3",
+        "@tiptap/extension-gapcursor": "^3.31.3",
+        "@tiptap/extension-heading": "^3.31.3",
+        "@tiptap/extension-highlight": "^3.31.3",
+        "@tiptap/extension-image": "^3.31.3",
+        "@tiptap/extension-link": "^3.31.3",
+        "@tiptap/extension-placeholder": "^3.31.3",
+        "@tiptap/extension-table": "^3.31.3",
+        "@tiptap/extensions": "^3.31.3",
+        "@tiptap/pm": "^3.31.3",
+        "@tiptap/react": "^3.31.3",
+        "@tiptap/starter-kit": "^3.31.3",
+        "@tiptap/static-renderer": "^3.31.3",
         "acorn": "^8.19.0",
         "clsx": "^2.1.1",
         "highlight.js": "^11.10.0",
diff --git a/packages/preview/client/preview.css b/packages/preview/client/preview.css
index b26e3691..939bcfbc 100644
--- a/packages/preview/client/preview.css
+++ b/packages/preview/client/preview.css
@@ -1,3 +1,15 @@
+/* Match apps/sites/app/globals.css: borders take the theme's border colour.
+ * Tailwind 4 defaults border-color to currentColor, so without this every
+ * card, divider and header border renders in the text colour. Being in the
+ * base layer, it still loses to utilities such as border-primary. */
+@layer base {
+  *,
+  ::before,
+  ::after {
+    border-color: var(--border);
+  }
+}
+
 html,
 body,
 #root {
diff --git a/packages/text-editor/package.json b/packages/text-editor/package.json
index a05fdf59..3f6fe2e2 100644
--- a/packages/text-editor/package.json
+++ b/packages/text-editor/package.json
@@ -74,24 +74,24 @@
   },
   "dependencies": {
     "@floating-ui/dom": "^1.6.0",
-    "@tiptap/core": "^3.0.0",
-    "@tiptap/extension-bubble-menu": "^3.10.4",
-    "@tiptap/extension-code": "3.31.3",
-    "@tiptap/extension-code-block": "3.31.3",
-    "@tiptap/extension-code-block-lowlight": "^3.0.0",
-    "@tiptap/extension-dropcursor": "^3.0.0",
-    "@tiptap/extension-gapcursor": "^3.0.0",
-    "@tiptap/extension-heading": "^3.0.0",
-    "@tiptap/extension-highlight": "^3.11.0",
-    "@tiptap/extension-image": "^3.0.0",
-    "@tiptap/extension-link": "^3.0.0",
-    "@tiptap/extension-placeholder": "^3.0.0",
-    "@tiptap/extension-table": "^3.10.7",
-    "@tiptap/extensions": "3.31.3",
-    "@tiptap/pm": "^3.0.0",
-    "@tiptap/react": "^3.0.0",
-    "@tiptap/starter-kit": "^3.0.0",
-    "@tiptap/static-renderer": "^3.10.7",
+    "@tiptap/core": "^3.31.3",
+    "@tiptap/extension-bubble-menu": "^3.31.3",
+    "@tiptap/extension-code": "^3.31.3",
+    "@tiptap/extension-code-block": "^3.31.3",
+    "@tiptap/extension-code-block-lowlight": "^3.31.3",
+    "@tiptap/extension-dropcursor": "^3.31.3",
+    "@tiptap/extension-gapcursor": "^3.31.3",
+    "@tiptap/extension-heading": "^3.31.3",
+    "@tiptap/extension-highlight": "^3.31.3",
+    "@tiptap/extension-image": "^3.31.3",
+    "@tiptap/extension-link": "^3.31.3",
+    "@tiptap/extension-placeholder": "^3.31.3",
+    "@tiptap/extension-table": "^3.31.3",
+    "@tiptap/extensions": "^3.31.3",
+    "@tiptap/pm": "^3.31.3",
+    "@tiptap/react": "^3.31.3",
+    "@tiptap/starter-kit": "^3.31.3",
+    "@tiptap/static-renderer": "^3.31.3",
     "acorn": "^8.19.0",
     "clsx": "^2.1.1",
     "highlight.js": "^11.10.0",