:root{
  --button-border-radius: 4px;
  --button-border-radius-ratio: 12;
  --button-border-radius-mini: 2px;
  --button-border-radius-small: 3px;
  --button-border-radius-large: 5px;
  --inputs-border-radius: 4px;
  --inputs-border-radius-ratio: 12;
  --thumb-border-radius: 4px;
  --thumb-border-radius-relative: 0.25;
  --course-content-border-radius: 0px;
  --course-content-border-radius-relative: 0;
  --progress-border-radius: 4px;
  --progress-border-radius-ratio: 8;
}