components/ui/toast.jsx

import * as React from "react"
import { cva } from "class-variance-authority"
import { cn } from "@/lib/utils"

const ToastProvider = ({ children }) => {
  return <div className="fixed top-4 right-4 z-[100] space-y-2">{children}</div>
}

const toastVariants = cva(
  "relative w-full rounded-md border p-4 shadow-lg",
  {
    variants: {
      variant: {
        default: "bg-background text-foreground",
        destructive: "border-destructive/50 text-destructive dark:border-destructive [&>svg]:text-destructive",
      },
    },
    defaultVariants: {
      variant: "default",
    },
  }
)

const Toast = React.forwardRef(({ className, variant, ...props }, ref) => (
  <div
    ref={ref}
    className={cn(toastVariants({ variant }), className)}
    {...props}
  />
))
Toast.displayName = "Toast"

const ToastTitle = React.forwardRef(({ className, ...props }, ref) => (
  <div
    ref={ref}
    className={cn("text-sm font-semibold", className)}
    {...props}
  />
))
ToastTitle.displayName = "ToastTitle"

const ToastDescription = React.forwardRef(({ className, ...props }, ref) => (
  <div
    ref={ref}
    className={cn("text-sm opacity-90", className)}
    {...props}
  />
))
ToastDescription.displayName = "ToastDescription"

const ToastClose = React.forwardRef(({ className, ...props }, ref) => (
  <button
    ref={ref}
    className={cn(
      "absolute right-2 top-2 rounded-md p-1 text-foreground/50 opacity-0 transition-opacity hover:text-foreground focus:opacity-100 focus:outline-none group-hover:opacity-100",
      className
    )}
    {...props}
  />
))
ToastClose.displayName = "ToastClose"

const ToastViewport = React.forwardRef(({ className, ...props }, ref) => (
  <div
    ref={ref}
    className={cn(
      "fixed top-0 z-[100] flex max-h-screen w-full flex-col-reverse p-4 sm:bottom-0 sm:right-0 sm:top-auto sm:flex-col md:max-w-[420px]",
      className
    )}
    {...props}
  />
))
ToastViewport.displayName = "ToastViewport"

export {
  ToastProvider,
  Toast,
  ToastTitle,
  ToastDescription,
  ToastClose,
  ToastViewport,
}