.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    background-color: #fff;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
  
    animation: fadeIn 0.5s ease-in-out forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -60%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}