frontend/src/components/theme-toggle.tsx


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"use client"

import * as React from "react"
import { Moon, Sun, Monitor } from "lucide-react"
import { useTheme } from "next-themes"

import { Button } from "@/components/ui/button"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"

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

  return (
    <DropdownMenu>
      <DropdownMenuTrigger asChild>
        <Button 
          variant="ghost" 
          size="icon" 
          className="nav-button-transparent backdrop-blur-sm"
        >
          <Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
          <Moon 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>
      </DropdownMenuTrigger>
      <DropdownMenuContent align="end" className="nav-dropdown-transparent">
        <DropdownMenuItem onClick={() => setTheme("light")} className="flex items-center gap-2 nav-dropdown-item">
          <Sun className="h-4 w-4" />
          Light
          {theme === "light" && <span className="ml-auto text-xs">✓</span>}
        </DropdownMenuItem>
        <DropdownMenuItem onClick={() => setTheme("dark")} className="flex items-center gap-2 nav-dropdown-item">
          <Moon className="h-4 w-4" />
          Dark
          {theme === "dark" && <span className="ml-auto text-xs">✓</span>}
        </DropdownMenuItem>
        <DropdownMenuItem onClick={() => setTheme("system")} className="flex items-center gap-2 nav-dropdown-item">
          <Monitor className="h-4 w-4" />
          System
          {theme === "system" && <span className="ml-auto text-xs">✓</span>}
        </DropdownMenuItem>
      </DropdownMenuContent>
    </DropdownMenu>
  )
}