Reviews floating Bagde close Button Background

CSS Codes
1

I would like a round background for the close button.
But the cross is not centred?
FloatingBadge

My CSS

.es-close-button-container {
  display: flex;
  align-items: center; 
  justify-content: center; 
  width: 18px; 
  height: 18px;
  border-radius: 50%;
  background-color: green; 
  position: absolut; 
  margin:-10px -10px 0 0;
}