diff --git a/src/index.css b/src/index.css
index a6540d8..f44fe74 100644
--- a/src/index.css
+++ b/src/index.css
@@ -172,4 +172,21 @@
 .fade-enter,
 .fade-exit-to {
   opacity: 0;
+}
+
+/* --- Tiptap Table Selection --- */
+.ProseMirror td.selectedCell,
+.ProseMirror th.selectedCell {
+  background: color-mix(in srgb, var(--primary), transparent 90%);
+  position: relative;
+}
+
+.ProseMirror td.selectedCell::after,
+.ProseMirror th.selectedCell::after {
+  content: "";
+  position: absolute;
+  inset: -1px;
+  border: 2px solid var(--primary);
+  pointer-events: none;
+  z-index: 10;
 }
\ No newline at end of file