.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.7);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
}

.popup {
  background-color: #fff;
  padding: 20px;
  border-radius: 5px;
  box-shadow: 0 0 10px rgba(0,0,0,0.5);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.close-btn {
  position: absolute;
  top: 0;
  right: 0;
  background-color: transparent;
  border: none;
  font-size: 20px;
  padding: 5px 10px;
  cursor: pointer;
}