.promo-popup {
    position: fixed;
    inset: 0;
    z-index: 99999;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 20px;

    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);

    opacity: 0;
    visibility: hidden;
    pointer-events: none;

    transition: opacity .3s, visibility .3s;
}

.promo-popup.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.promo-popup__window {
    position: relative;
    width: fit-content;
    max-width: 100%;
    max-height: 90vh;
}

.promo-popup__link {
    display: block;
    line-height: 0;
}

.promo-popup__window img {
    display: block;
    width: auto;
    max-width: 100%;
    max-height: 85vh;
    height: auto;

    object-fit: contain;
    border-radius: 12px;
}

.promo-popup__close {
    position: absolute;
    top: -15px;
    right: -15px;

    z-index: 2;
    width: 36px;
    height: 36px;

    border: none;
    border-radius: 50%;

    background: #fff;
    color: #222;
    font-size: 26px;
    line-height: 1;

    cursor: pointer;
    box-shadow: 0 3px 15px rgba(0,0,0,.2);
}

@media (max-width: 600px) {
    .promo-popup {
        padding: 15px;
    }

    .promo-popup__close {
        top: -12px;
        right: -8px;
    }

    .promo-popup__window img {
        max-height: 80vh;
    }
}