feat: improve theme

app/app.config.ts

@@ -0,0 +1,10 @@
+export default defineAppConfig({
+  ui: {
+    colors: {
+      primary: "neutral",
+      neutral: "zinc",
+      success: "emerald",
+      error: "rose",
+    }
+  }
+})

app/assets/css/main.css

@@ -1,2 +1,6 @@
 @import "tailwindcss";
 @import "@nuxt/ui";
+
+:root {
+  --ui-radius: 0rem;
+}