body {
  font-family: Rockwell, 'Rockwell Nova', 'Roboto Slab', 'DejaVu Serif', 'Sitka Small', serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 20px;
  min-height: 100vh;
  overflow: hidden;
}

.image-container {
  position: relative;
  width: 100%;
  max-width: 800px;
  margin-bottom: 30px;
}

.image-container img {
  width: 100%;
  height: auto;
  display: block;
}

.image-container .top-image {
  position: absolute;
  top: 0;
  left: 0;
  transition: opacity 0.1s ease;
}

.image-container .bottom-image {
  position: relative;
}

.slider-control {
  width: 100%;
  max-width: 800px;
  text-align: center;
}

input[type="range"] {
  width: 100%;
}