let lenis;

document.addEventListener("DOMContentLoaded", () => {

  gsap.registerPlugin(ScrollTrigger)

  lenis = new Lenis({
    duration: 1.2,
    easing: t => Math.min(1, 1.001 - Math.pow(2, -10 * t)),
    smooth: true,
    smoothTouch: false,
  })

  function raf(time) {
    lenis.raf(time)
    requestAnimationFrame(raf)
  }

  requestAnimationFrame(raf)

  lenis.on("scroll", ScrollTrigger.update)

  ScrollTrigger.scrollerProxy(document.documentElement, {
    scrollTop(value) {
      return arguments.length
        ? lenis.scrollTo(value, { immediate: true })
        : window.scrollY
    },
    getBoundingClientRect() {
      return {
        top: 0,
        left: 0,
        width: window.innerWidth,
        height: window.innerHeight
      }
    },
    pinType: "transform"
  })

  ScrollTrigger.refresh()


  // 앵커 링크 부드럽게 이동
  document.querySelectorAll('a[href^="#"]').forEach(link => {
    link.addEventListener("click", e => {
      e.preventDefault()
      const id = link.getAttribute("href")
      const target = document.querySelector(id)
      if (target) {
        lenis.scrollTo(target, {
          offset: 0,      // 필요 시 -헤더 높이만큼 조절 : -50
          duration: 1.2,
          easing: t => Math.min(1, 1.001 - Math.pow(2, -10 * t))
        })
      }
    })
  })
})