:root{
  --button-border-radius: 5px;
  --button-border-radius-ratio: 9.6;
  --button-border-radius-mini: 3px;
  --button-border-radius-small: 4px;
  --button-border-radius-large: 7px;
  --inputs-border-radius: 5px;
  --inputs-border-radius-ratio: 9.6;
  --thumb-border-radius: 5px;
  --thumb-border-radius-relative: 0.3125;
  --course-content-border-radius: 5px;
  --course-content-border-radius-relative: 0.15625;
  --progress-border-radius: 5px;
  --progress-border-radius-ratio: 6.4;
}