.popup-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    padding: 40px;
}

@media (max-width: 639px) {
    .popup-container {
        padding: 20px;
    }
}

.popup-container.is-hidden {
    display: none;
}

.popup-content {
    position: relative;
    background: #fff;
    max-width: 600px;
    width: 100%;
}

.popup-content img {
    max-width: 100%;
    height: auto;
    display: block;
}

.close-popup {
    position: absolute;
    top: 6px;
    right: 10px;
    cursor: pointer;
    font-size: 26px;
    font-weight: bold;
    line-height: 1;
}

.close-popup:hover {
    color: red;
}