.progress-container {
  /* position: fixed; */
  /* top: 0;
  left: 0; */
  width: 100%;
  height: 8px;
  background: #e0e0e0;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: #4caf50;
  transition: width 0.3s ease-in-out;
}
img {
  max-width: 100%;
  height: auto;
  border: 1px solid #ccc;
  margin:  0;
}
.navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 2em;
}

.navigation_button {
  padding: 0.5em 1em;
  font-size: 1em;
  cursor: pointer;
}