HTMLify

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-color: #000;
  overflow-x: hidden;
  overscroll-behavior-y: none;
}
.img-gallery-ctr {
  height: 200vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-inline: 1rem;
  padding-block: 10vh;
}
.img-gallery-ctr.order {
}
.img-gallery_content {
  cursor: pointer;
  position: relative;
  border-radius: 0.5rem;
  margin-bottom: 1em;
  max-width: 800px;
  width: 100%;
  margin-inline: auto;
  overflow: hidden;
  flex: 1;
  transition: flex 0.5s ease-in-out;
}
.img-gallery_content:hover {
  flex: 10;
}
.img-gallery_content.reorder {
  position: fixed;
  top: 40%;
  width: 100%;
  height: 200px;
}
img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.btn {
  font-family: "poppins", sans-serif;
  cursor: pointer;
  width: 10em;
  height: 5rem;
  z-index: 10;
  position: fixed;
  right: 10px;
  top: 0;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  outline: transparent;
  border: none;
}