freeCodeCamp/common/app/routes/Challenges/views/classic/classic.less

// should match filename and ./ns.json
@ns: classic;

// challenge panes are bound to the pane size which in turn is
// bound to the total height minus navbar height
.max-element-height() {
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
}

.@{ns}-instructions-panel {
  .max-element-height();
  padding-bottom: 10px;
  padding-left: 5px;
  padding-right: 5px;
}

.@{ns}-editor {
  .max-element-height();
  width: 100%;
}