html, body {
  margin: 0;
  }
.box {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
  background: url(/background.webp) 50% 50% / cover no-repeat;
}
.lovepochmak {
  display: flex;
  max-width: 80%;
  max-height: 80%;
  width: 80%;
  height: 80%;
  background: url(/lovepochmak.webp) 50% 50% / contain no-repeat;
}
.fade-in {
  animation: fadeIn 1s ease-in forwards;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}