.intro {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 200vh;
  box-sizing: border-box;
  background: url(https://images.unsplash.com/photo-1693733470033-c628154571b2?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=3000&q=80) 50% 100% / cover no-repeat;
}
.cover {
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: red;
  font-size: 10vw;
  font-weight: 800;
  mix-blend-mode: lighten;
  color: #000;
  background-color: white;
}
section {
  overflow: hidden;
  position: relative;
  height: 80vh;
  margin:0;
  padding: 100px 0;
  background-color: #fff;
  background-image:
    linear-gradient(rgba(0,0,0,.07) 2px, transparent 2px),
    linear-gradient(90deg, rgba(0,0,0,.07) 2px, transparent 2px),
    linear-gradient(rgba(0,0,0,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.06) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
  background-position: -2px -2px, -2px -2px, -1px -1px, -1px -1px;
  border: 5px solid #000;
}
.box {
  width: 200px;
  height: 200px;
  margin-bottom: 100px;
  box-sizing: border-box;
}

.box1 {
  position: absolute;
  top: 200px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: lightblue;  
}
.box2 {
  background: blue;  
}
.section2 {
  // height: 20vh;
}

// setting
// https://unpkg.co/gsap@3/dist/gsap.min.js
// https://unpkg.com/gsap@3/dist/ScrollTrigger.min.js

gsap.to(".cover", {
  top: "-100%",
  // duration: 1,
  scrollTrigger: {
    trigger: '.intro',//객체기준범위
    start: "0% 0%",//시작 지점
    end: "90% 80%",//끝 지점
    // end: "+=500"//시작 부분부터 500px까지 스크롤 한 후종료
    scrub: 1,//부드러운 스크러빙
    markers: false,//개발가이드선
  },
});

gsap.to(".box1", {
  scale: 10,
  borderRadius: 0,
  duration: 1,
  scrollTrigger: {
    trigger: '.section',//객체기준범위
    start: "0% 30%",//시작 지점
    end: "100% 80%",//끝 지점
    // end: "+=500"//시작 부분부터 500px까지 스크롤 한 후종료
    scrub: 1,//부드러운 스크러빙
    markers: true,//개발가이드선
  }
});

gsap.to(".box2", {
  x: 300,
  y: 200,
  rotation: 360,
  scrollTrigger: {
    trigger: '.section2',//객체기준범위
    start: "0% 30%",//시작 지점
    end: "100% 80%",//끝 지점
    // end: "+=500"//시작 부분부터 500px까지 스크롤 한 후종료
    scrub: 1,//부드러운 스크러빙
    markers: false,//개발가이드선
  }
});