<div style="width: 100%; height: 2000px;">
    <div class="instruction">
      Scroll Down Please
    </div>
  </div>
  <main>
    <section id="panel1-img">
      <div class="shape-circle"></div>
    </section>
  </main>

/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
  display: block;
}

body {
  line-height: 1;
}

ol,
ul {
  list-style: none;
}

blockquote,
q {
  quotes: none;
}

blockquote:before,
blockquote:after,
q:before,
q:after {
  content: '';
  content: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

body {
  background-color: #111111;
  font-family: sans-serif;
}

#main-img-wrapper {
  padding-top: 139px;
  text-align: center;
}

#intro-main {
  display: flex;
  flex-direction: column;
  margin: 54px auto 140px;
  width: 300px;
  align-items: center;
  color: white;
  font-size: 40px;
  font-weight: 500;
  gap: 20px;
}

#join-us-text {
  margin-top: 73px;
  font-size: 16px;
  font-weight: 400;
  opacity: .6;
}

#intro-main p {
  text-align: center;
}

@keyframes upAndDown {
  0% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }

  100% {
    transform: translateY(0);
  }
}

#down-arrow-icon {
  width: 33px;
  animation: upAndDown 1s infinite;
}

#list-item-wrapper {
  margin: 0 auto 500px;
  width: 383px;
}

.list-item {
  display: inline;
  font-size: 48px;
  font-weight: 600;
}

.list-item::before {
  display: inline-block;
  background-image: url('./icons/dark_house.png');
  background-size: 51px 53px;
  content: "";
  width: 51px;
  height: 53px;
}

.list-item#on {
  color: white;
}

.list-item#on::before {
  background-image: url('./icons/light_house.png');
}

#panel1-img {
  margin-bottom: 500px;
  position: relative;
  height: 400px;
}

.instruction {
  color: white;
  display: flex;
  justify-content: center;
  padding: 2rem;
  font-weight: bold;
  font-size: 2rem;
}

.shape-circle {
  width: 400px;
  height: 400px;
  background-image: linear-gradient(90deg, #FFD700, #FF8C00);
  border-radius: 50%;
  position: absolute;
  right: -200px;
  transform-origin: top;
}

 document.addEventListener('DOMContentLoaded', () => {
    const shapeCircle = document.querySelector('.shape-circle');
    const panel1Img = document.querySelector('#panel1-img');
    
    window.addEventListener('scroll', () => {
      const scrollValue = window.scrollY;
      const panel1ImgTop = panel1Img.offsetTop;
      const panel1ImgHeight = panel1Img.clientHeight;

      console.log("scrollValue: ", scrollValue);
      console.log("panel1ImgTop: ", panel1ImgTop);
      console.log("panel1ImgHeight: ", panel1ImgHeight);

      if (scrollValue > panel1ImgTop - panel1ImgHeight) {
        shapeCircle.style.transform= `rotate(${scrollValue - panel1ImgTop}deg)`;
      }
    });
  })