/* lightbox.css — Full-screen image viewer overlay */

.lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

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

/* Main image */
.lb-image {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    user-select: none;
    -webkit-user-drag: none;
    transition: opacity 0.2s ease;
}

.lb-image.loading {
    opacity: 0.3;
}

/* Navigation buttons */
.lb-prev,
.lb-next {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: none;
    font-size: 2.5rem;
    width: 3rem;
    height: 4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background 0.15s ease;
    z-index: 1002;
    line-height: 1;
    padding: 0;
}

.lb-prev { left: 1rem; }
.lb-next { right: 1rem; }

.lb-prev:hover,
.lb-next:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Close button */
.lb-close {
    position: fixed;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: none;
    font-size: 2rem;
    width: 2.5rem;
    height: 2.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.15s ease;
    z-index: 1002;
    line-height: 1;
    padding: 0;
}

.lb-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Counter */
.lb-counter {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    font-family: Arial, sans-serif;
    z-index: 1002;
    user-select: none;
}

/* Loading spinner */
.lb-spinner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top-color: #fff;
    border-radius: 50%;
    animation: lb-spin 0.8s linear infinite;
    z-index: 1001;
    display: none;
}

.lightbox-overlay.active .lb-spinner {
    display: block;
}

.lightbox-overlay.active .lb-image:not(.loading) ~ .lb-spinner {
    display: none;
}

@keyframes lb-spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive: hide buttons on very small screens (use swipe) */
@media (max-width: 600px) {
    .lb-prev,
    .lb-next {
        width: 2.5rem;
        height: 3rem;
        font-size: 1.8rem;
    }

    .lb-prev { left: 0.5rem; }
    .lb-next { right: 0.5rem; }
}

/* Disable body scroll when lightbox is open */
body.lightbox-open {
    overflow: hidden;
}