.lb-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.92);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.lb-overlay.active {
    opacity: 1;
    visibility: visible;
}

.lb-stage {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    padding: 60px 80px;
    box-sizing: border-box;
}

.lb-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.6);
    user-select: none;
    -webkit-user-drag: none;
}

.lb-close {
    position: absolute;
    top: 16px;
    right: 24px;
    background: none;
    border: none;
    color: #fff;
    font-size: 36px;
    line-height: 1;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.15s;
    z-index: 10001;
    padding: 4px 8px;
}

.lb-close:hover { opacity: 1; }

.lb-prev,
.lb-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #fff;
    font-size: 56px;
    line-height: 1;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.15s;
    z-index: 10001;
    padding: 8px 14px;
    user-select: none;
}

.lb-prev { left: 12px; }
.lb-next { right: 12px; }
.lb-prev:hover,
.lb-next:hover { opacity: 1; }

.lb-caption {
    color: #ddd;
    font-size: 14px;
    margin-top: 12px;
    text-align: center;
    max-width: 80%;
    line-height: 1.4;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    user-select: none;
}

.lb-counter {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    font-size: 13px;
    opacity: 0.6;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    user-select: none;
}

@media (max-width: 600px) {
    .lb-stage { padding: 48px 12px; }
    .lb-prev { left: 2px; font-size: 40px; }
    .lb-next { right: 2px; font-size: 40px; }
    .lb-close { top: 8px; right: 12px; font-size: 28px; }
}