body {
  margin: 0;
  background: #222;
  font-family: Arial, sans-serif;
}

/* Call Me Button */

#callMeBtn {
  position: fixed;
  bottom: 50px;
  right: -40px;
  background: transparent;
  color: white;
  font-size: 20px;
  font-family: courier;
  transform: rotate(-90deg);
  cursor: pointer;
  z-index: 200;
  padding: 10px 15px;
}

/* Popup Overlay */

.popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 300;
}

.popup.hidden {
  display: none;
}

/* Popup Content */

.popup-content {
  background: white;
  padding: 20px 30px;
  border-radius: 15px;
  max-width: 400px;
  text-align: center;
  box-shadow: 0px 4px 15px rgba(0,0,0,0.3);
}