.popup {
    display: contents; /* hidden via [hidden] attribute */
}

    .popup[hidden] {
        display: none;
    }

.popup__backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 999;
    cursor: pointer;
}

.popup__content {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
    background: #fff;
    padding: 1rem;
    border-radius: 6px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.popup__close {
    display: block;
    margin-left: auto;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.popup__image {
    max-width:100vw;
    max-height: 70vh;
    display: block;
}

.help-link {
    cursor: pointer;
    text-decoration: underline;
}