.html-fill-container {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-width: 0;
  min-height: 0;
}
.html-fill-container > .html-fill-item {
  /* Fill items can grow and shrink freely within
     available vertical space in fillable container */
  flex: 1 1 auto;
  overflow: auto;
  width: 100%;
}
.html-fill-container > :not(.html-fill-item) {
  /* Prevent shrinking or growing of non-fill items */
  flex: 0 0 auto;
}
.html-fill-container > .html-fill-item.html-fill-item-overflow-hidden {
  overflow: hidden;
}