.popup {
    position: fixed;
    width: 100%;
    height: 100%;
    background-color: rgba(29, 29, 29, 0.712);
    z-index: 2;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

.popup-window {
    margin: auto;
    width: 50%;
    padding: 20px;
    z-index: 3;
    height: 40%;
    text-align: center;
    background-color: rgb(37, 37, 37);
    margin-top: 100px;
    border-radius: 10px;
}

.popup-window h1 {
    color: blueviolet;
}

.popup-window p {
    color: rgb(253, 253, 253);
}

@media only screen and (max-width: 900px) {
    .popup-window {
        width: 90%;
        height: 80%;
    }
}