body {
  font-family: Arial, sans-serif;
}

/* Popup background */
.popup {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  justify-content: center;
  align-items: center;
}

/* Popup box */
.popup-content {
  background: #fff;
  padding: 20px;
  width: 300px;
  border-radius: 6px;
  position: relative;
}

/* Close button */
.close {
  position: absolute;
  top: 8px;
  right: 12px;
  cursor: pointer;
  font-size: 20px;
}