.lightbox {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(10, 9, 18, 0.92);
    z-index: 200;
}

.lightbox--open {
    display: flex;
}

.lightbox__img {
    max-width: 92vw;
    max-height: 90vh;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.lightbox__close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-lg);
    background: none;
    border: none;
    color: #fff;
    font-size: 2.5rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.8;
    z-index: 2;
}

.lightbox__close:hover { opacity: 1; }

.lightbox__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: #fff;
    font-size: 2.5rem;
    line-height: 1;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius);
    cursor: pointer;
    z-index: 2;
}

.lightbox__nav:hover { background: rgba(255, 255, 255, 0.18); }
.lightbox__nav--prev { left: var(--space-md); }
.lightbox__nav--next { right: var(--space-md); }

.lightbox__counter {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

.topic-detail__media img {
    cursor: zoom-in;
}