.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6); /* Semi-transparent overlay */
  z-index: 1; /* Put overlay above the popup */
  display: none; /* Hide the overlay by default */
}

.popup {
  background: linear-gradient(90.02deg,#b3b3b3 -65.85%,#f7f7f7 101.81%);
  box-shadow: 0px -4px 8px rgba(0, 0, 0, 0.1);
  padding: 20px;
  position: fixed;
  bottom: -100%; 
  left: 0;
  width: 100%;
  transition: bottom 0.3s ease-out;
  z-index: 999; 
}

button {
  font-size: 16px;
  cursor: pointer;
}