src/components/theme-button.tsx

"use client";

import { MoonIcon, SunIcon } from "@radix-ui/react-icons";
import { useTheme } from "next-themes";

import { Button } from "@/components/ui/button";

export function ThemeButton() {
  const { theme, setTheme } = useTheme();

  return (
    <Button
      variant="ghost"
      className="rounded-full"
      size="icon"
      onClick={() => setTheme(theme === "dark" ? "light" : "dark")}
    >
      <SunIcon className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
      <MoonIcon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
      <span className="sr-only">Toggle theme</span>
    </Button>
  );
}