/* ================================================================
   GD Drive Gallery — Stylesheet
   ================================================================ */

/* ---------- Wrapper ---------- */
.gdgallery-wrap {
    --gdg-cols: 3;
    --gdg-gap: 12px;
    --gdg-radius: 10px;
    --gdg-accent: #2563eb;
    --gdg-overlay: rgba(0, 0, 0, 0.45);
    --gdg-transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    width: 100%;
    font-family: inherit;
}

/* ---------- Loader ---------- */
.gdgallery-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 48px 24px;
    color: #6b7280;
    font-size: 0.9rem;
}

.gdgallery-spinner {
    display: inline-block;
    width: 36px;
    height: 36px;
    border: 3px solid #e5e7eb;
    border-top-color: var(--gdg-accent);
    border-radius: 50%;
    animation: gdg-spin 0.7s linear infinite;
}

@keyframes gdg-spin {
    to { transform: rotate(360deg); }
}

/* ---------- Grid ---------- */
.gdgallery-grid {
    display: grid;
    grid-template-columns: repeat(var(--gdg-cols), 1fr);
    gap: var(--gdg-gap);
}

/* ---------- Item ---------- */
.gdgallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--gdg-radius);
    background: #f3f4f6;
    cursor: pointer;
    aspect-ratio: 1 / 1;
    /* Staggered fade-in */
    opacity: 0;
    transform: translateY(12px);
    animation: gdg-fadeup var(--gdg-transition) forwards;
}

@keyframes gdg-fadeup {
    to { opacity: 1; transform: translateY(0); }
}

.gdgallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--gdg-transition);
}

/* Hover overlay */
.gdgallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gdg-overlay);
    opacity: 0;
    transition: opacity var(--gdg-transition);
    border-radius: var(--gdg-radius);
}

.gdgallery-item:hover::after {
    opacity: 1;
}

.gdgallery-item:hover img {
    transform: scale(1.06);
}

/* Zoom icon on hover */
.gdgallery-item__icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.7);
    z-index: 2;
    opacity: 0;
    transition: opacity var(--gdg-transition), transform var(--gdg-transition);
    color: #fff;
    pointer-events: none;
}

.gdgallery-item:hover .gdgallery-item__icon {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.gdgallery-item__icon svg {
    width: 36px;
    height: 36px;
    filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5));
}

/* Caption strip */
.gdgallery-item__caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 3;
    padding: 8px 10px 6px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: #fff;
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transform: translateY(100%);
    transition: transform var(--gdg-transition);
    border-radius: 0 0 var(--gdg-radius) var(--gdg-radius);
}

.gdgallery-item:hover .gdgallery-item__caption {
    transform: translateY(0);
}

/* ---------- Error ---------- */
.gdgallery-error,
.gdgallery-error-msg {
    padding: 14px 18px;
    background: #fef2f2;
    border-left: 4px solid #ef4444;
    border-radius: 6px;
    color: #b91c1c;
    font-size: 0.9rem;
    margin: 12px 0;
}

/* ================================================================
   Lightbox
   ================================================================ */
.gdgallery-lightbox {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: gdg-lb-in 0.22s ease;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.gdgallery-lightbox[hidden] {
    display: none !important;
}

@keyframes gdg-lb-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.gdgallery-lb-content {
    position: relative;
    max-width: 90vw;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.gdgallery-lb-img {
    max-width: 90vw;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 24px 80px rgba(0,0,0,0.8);
    animation: gdg-lb-img-in 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes gdg-lb-img-in {
    from { transform: scale(0.93); opacity: 0; }
    to   { transform: scale(1);    opacity: 1; }
}

.gdgallery-lb-caption {
    color: rgba(255,255,255,0.75);
    font-size: 0.85rem;
    text-align: center;
    margin: 0;
    max-width: 80vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Lightbox Buttons */
.gdgallery-lb-close,
.gdgallery-lb-prev,
.gdgallery-lb-next {
    position: fixed;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    cursor: pointer;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.4rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    backdrop-filter: blur(4px);
}

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

.gdgallery-lb-close {
    top: 20px;
    right: 20px;
    font-size: 1.6rem;
}

.gdgallery-lb-prev {
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.8rem;
}

.gdgallery-lb-next {
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.8rem;
}

/* ================================================================
   Responsive
   ================================================================ */
@media (max-width: 1024px) {
    .gdgallery-grid {
        --gdg-cols: max(2, calc(var(--gdg-cols) - 1));
    }
}

@media (max-width: 600px) {
    .gdgallery-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    .gdgallery-lb-prev { left: 8px; }
    .gdgallery-lb-next { right: 8px; }
}