@-webkit-keyframes fade-in {
    from { opacity: 0 }
    to { opacity: 1 }
}
@keyframes fade-in {
    from { opacity: 0 }
    to { opacity: 1 }
}

.popup-container {
    position: fixed;
    top: 0;
    left: 0;

    width: 100vw;
    height: 100vh;

    display: none;
    z-index: 1500;

    background-color: rgba(0, 0, 0, 0.8);
}
.popup-container.show {
    display: flex;
    -webkit-animation: face-in 1s;
    animation: fade-in 1s;
}

.popup {
    min-height: 100px;
    max-height: 90vh;
    min-width: 200px;
    max-width: 50vw;
    border-radius: 4px;

    margin: auto;
    padding: 1rem 3rem;
    border: 1px solid black;

    text-align: center;
    background-color: #eee;

    position: relative;
    overflow: auto;
}

.popup-close-button {
    max-width: 24px;
    max-height: 24px;
    border-radius: 4px;

    cursor: pointer;
    background-color: red;
    color: white;
}

@media (max-width: 764px) {
    .popup {
        max-width: 90vw;
    }
}