/* Image lightbox */
.research-lightbox {
    position: fixed;
    inset: 0;
    z-index: var(--z-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-fast);
}

.research-lightbox[aria-hidden="true"] {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.research-lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
}

.research-lightbox__panel {
    position: relative;
    margin: 0;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.research-lightbox__close {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    color: rgba(var(--white-rgb), var(--o-70));
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

/* Transparent ≥44px touch target, centered on the button; absolute, so zero layout impact. */
.research-lightbox__close::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 44px;
    height: 44px;
    transform: translate(-50%, -50%);
}

@media (min-width: 600px) {
    .research-lightbox__close {
        top: -2rem;
        right: -2rem;
        background: none;
    }
}

.research-lightbox__close:hover,
.research-lightbox__close:focus-visible {
    color: #fff;
}

.research-lightbox__image {
    max-width: 100%;
    max-height: 70vh;
    min-height: 0;
    object-fit: contain;
    border-radius: var(--radius-xs);
}

.research-lightbox__caption {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: rgba(var(--white-rgb), 0.85);
    text-align: center;
    max-width: 100%;
    max-height: 20vh;
    overflow: auto;
    white-space: pre-line;
}