body,html {
  background-image: url(bg.PNG);
  background-position: center;
  background-size: cover;
  width: 100%;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

#container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow: hidden;
    justify-content: flex-start;
}

#container h1 {
    text-align: center;
    font-size: 20px;
    margin: 10px 0;
    flex: 0 0 auto;
}

#image_container {
    flex: 1;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

#image_container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}