:root{
  --button-border-radius: 18px;
  --button-border-radius-ratio: 2.7;
  --button-border-radius-mini: 9px;
  --button-border-radius-small: 14px;
  --button-border-radius-large: 24px;
  --inputs-border-radius: 8px;
  --inputs-border-radius-ratio: 6;
  --thumb-border-radius: 6px;
  --thumb-border-radius-relative: 0.375;
  --course-content-border-radius: 12px;
  --course-content-border-radius-relative: 0.375;
  --progress-border-radius: 6px;
  --progress-border-radius-ratio: 5.3;
}