diff --git a/app/tailwind.css b/app/tailwind.css
new file mode 100644
index 0000000..4a53cd6
--- /dev/null
+++ b/app/tailwind.css
@@ -0,0 +1,19 @@
+/* Dark mode variant - CRITICAL for dark: classes to work */
+@variant dark (&:where(.dark, .dark *));
+
+/* Theme variables - CRITICAL for colors and sizing */
+@theme {
+  --radius: 0.625rem;
+
+  /* Neutral colors */
+  --color-neutral-50: rgb(250 250 250);
+  --color-neutral-100: rgb(245 245 245);
+  --color-neutral-200: rgb(229 229 229);
+  --color-neutral-300: rgb(212 212 212);
+  --color-neutral-400: rgb(163 163 163);
+  --color-neutral-500: rgb(115 115 115);
+  --color-neutral-600: rgb(82 82 82);
+  --color-neutral-700: rgb(64 64 64);
+  --color-neutral-800: rgb(38 38 38);
+  --color-neutral-900: rgb(23 23 23);
+}