src/components/ui/accordion.tsx

import * as React from "react"
import * as AccordionPrimitive from "@radix-ui/react-accordion"
import { ChevronDown } from "lucide-react"

import { cn } from "@/lib/utils"

const Accordion = AccordionPrimitive.Root

const AccordionItem = React.forwardRef<
  React.ElementRef<typeof AccordionPrimitive.Item>,
  React.ComponentPropsWithoutRef<typeof AccordionPrimitive.Item>
>(({ className, ...props }, ref) => (
  <AccordionPrimitive.Item

    ref={ref}

    className={cn("border-b", className)}

    {...props}

  />
))
AccordionItem.displayName = "AccordionItem"

const AccordionTrigger = React.forwardRef<
  React.ElementRef<typeof AccordionPrimitive.Trigger>,
  React.ComponentPropsWithoutRef<typeof AccordionPrimitive.Trigger>
>(({ className, children, ...props }, ref) => (
  <AccordionPrimitive.Header className="flex">

    <AccordionPrimitive.Trigger

      ref={ref}

      className={cn(

        "flex flex-1 items-center justify-between py-4 font-medium transition-all hover:underline [&[data-state=open]>svg]:rotate-180",

        className

      )}

      {...props}

    >

      {children}

      <ChevronDown className="h-4 w-4 shrink-0 transition-transform duration-200" />

    </AccordionPrimitive.Trigger>

  </AccordionPrimitive.Header>
))
AccordionTrigger.displayName = AccordionPrimitive.Trigger.displayName

const AccordionContent = React.forwardRef<
  React.ElementRef<typeof AccordionPrimitive.Content>,
  React.ComponentPropsWithoutRef<typeof AccordionPrimitive.Content>
>(({ className, children, ...props }, ref) => (
  <AccordionPrimitive.Content

    ref={ref}

    className="overflow-hidden text-sm transition-all data-[state=closed]:animate-accordion-up data-[state=open]:animate-accordion-down"

    {...props}

  >

    <div className={cn("pb-4 pt-0", className)}>{children}</div>

  </AccordionPrimitive.Content>
))

AccordionContent.displayName = AccordionPrimitive.Content.displayName

export { Accordion, AccordionItem, AccordionTrigger, AccordionContent }