/**
 * Masonry Gallery styles - Modern CSS Grid Layout
 *
 * @package GDrive_Post_Creator
 */

/* CSS Variables for easy customization */
:root {
    --gallery-gap: 20px;
    --gallery-columns-desktop: 4;
    --gallery-columns-tablet: 3;
    --gallery-columns-mobile: 2;
    --gallery-columns-small: 1;
}

/* Masonry Gallery Container - CSS Grid based */
.gdrive-masonry-gallery {
    display: grid;
    grid-template-columns: repeat(var(--gallery-columns-desktop), 1fr);
    gap: var(--gallery-gap);
    margin: 20px 0;
    padding: 0;
}

/* Column variants via data attribute */
.gdrive-masonry-gallery[data-columns="1"] {
    --gallery-columns-desktop: 1;
    --gallery-columns-tablet: 1;
    --gallery-columns-mobile: 1;
}

.gdrive-masonry-gallery[data-columns="2"] {
    --gallery-columns-desktop: 2;
    --gallery-columns-tablet: 2;
    --gallery-columns-mobile: 1;
}

.gdrive-masonry-gallery[data-columns="3"] {
    --gallery-columns-desktop: 3;
    --gallery-columns-tablet: 2;
    --gallery-columns-mobile: 1;
}

.gdrive-masonry-gallery[data-columns="4"] {
    --gallery-columns-desktop: 4;
    --gallery-columns-tablet: 3;
    --gallery-columns-mobile: 2;
}

.gdrive-masonry-gallery[data-columns="5"] {
    --gallery-columns-desktop: 5;
    --gallery-columns-tablet: 3;
    --gallery-columns-mobile: 2;
}

.gdrive-masonry-gallery[data-columns="6"] {
    --gallery-columns-desktop: 6;
    --gallery-columns-tablet: 4;
    --gallery-columns-mobile: 2;
}

/* Masonry Items - Modern card design */
.gdrive-masonry-gallery .masonry-item {
    overflow: hidden;
    position: relative;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    background: #fff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gdrive-masonry-gallery .masonry-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

/* Gallery Link - Modern card style */
.gdrive-gallery-link {
    display: block;
    position: relative;
    overflow: hidden;
    line-height: 0;
    border-radius: 12px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.gdrive-gallery-link:hover {
    transform: scale(1.02);
}

/* Gallery Images - Uniform height with aspect ratio */
.gdrive-masonry-gallery img {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    display: block;
    object-fit: cover;
    border-radius: 12px;
    transition: filter 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
    /* GPU-Beschleunigung für flüssigere Animationen */
    will-change: opacity, filter;
    contain: layout style paint;
}

/* Lazy loading placeholder */
.gdrive-masonry-gallery img[data-src] {
    opacity: 0.5;
    filter: blur(5px);
}

/* Image loaded state */
.gdrive-masonry-gallery img.gdrive-image-loaded {
    opacity: 1;
    filter: none;
}

.gdrive-gallery-link:hover img {
    filter: brightness(1.05);
    transform: scale(1.03);
}

/* Gallery Videos - Clean design */
.gdrive-masonry-gallery video {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.gdrive-masonry-gallery .video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    background: #000;
}

.gdrive-masonry-gallery .video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.gdrive-masonry-gallery .video-item {
    background: #000;
}

.gdrive-masonry-gallery .gdrive-video {
    background: #000;
}

/* Folder Items in browsable gallery */
.gdrive-masonry-gallery .folder-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px 15px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px solid #dee2e6;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 150px;
    overflow: hidden;
}

.gdrive-masonry-gallery .folder-item:hover {
    border-color: #4285f4;
    background: linear-gradient(135deg, #e8f0fe 0%, #d2e3fc 100%);
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(66, 133, 244, 0.15);
}

.gdrive-masonry-gallery .folder-item .folder-icon {
    font-size: 48px;
    color: #4285f4;
    margin-bottom: 12px;
}

.gdrive-masonry-gallery .folder-item .folder-name {
    font-size: 14px;
    font-weight: 500;
    color: #202124;
    text-align: center;
    word-break: break-word;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* Folder Thumbnail */
.gdrive-masonry-gallery .folder-item .folder-thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    margin-bottom: 12px;
    border-radius: 8px;
    overflow: hidden;
}

.gdrive-masonry-gallery .folder-item .folder-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gdrive-masonry-gallery .folder-item:hover .folder-thumbnail img {
    transform: scale(1.05);
}

.gdrive-masonry-gallery .folder-item .folder-overlay {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    padding: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.gdrive-masonry-gallery .folder-item .folder-overlay svg {
    width: 16px;
    height: 16px;
    color: #4285f4;
    display: block;
}

/* Lightbox Overlay */
.gdrive-lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 999999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(10px);
}

.gdrive-lightbox-overlay.active {
    display: flex;
}

.gdrive-lightbox-content {
    max-width: 95%;
    max-height: 95vh;
    position: relative;
}

.gdrive-lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    display: block;
    object-fit: contain;
}

.gdrive-lightbox-close {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #fff;
    font-size: 32px;
    cursor: pointer;
    line-height: 1;
    padding: 10px;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.gdrive-lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.gdrive-lightbox-prev,
.gdrive-lightbox-next {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #fff;
    font-size: 36px;
    cursor: pointer;
    padding: 20px 15px;
    border-radius: 8px;
    transition: background 0.3s;
}

.gdrive-lightbox-prev:hover,
.gdrive-lightbox-next:hover {
    background: rgba(255, 255, 255, 0.2);
}

.gdrive-lightbox-prev {
    left: 20px;
}

.gdrive-lightbox-next {
    right: 20px;
}

/* Lightbox Counter */
.gdrive-lightbox-counter {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    font-size: 14px;
    background: rgba(0, 0, 0, 0.5);
    padding: 8px 16px;
    border-radius: 20px;
    z-index: 1000000;
}

/* Load More Button Container */
.gdrive-load-more-container {
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    width: 100% !important;
    margin: 40px auto 20px !important;
    padding: 0 20px !important;
    text-align: center !important;
    box-sizing: border-box !important;
}

/* Load More Button - Dark red, rounded, perfectly centered text */
.gdrive-load-more-btn {
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    padding: 14px 40px !important;
    background: #8B0000 !important;
    color: #ffffff !important;
    border: none !important;
    border-radius: 30px !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    line-height: 1 !important;
    cursor: pointer !important;
    transition: all 0.3s ease !important;
    box-shadow: 0 4px 15px rgba(139, 0, 0, 0.3) !important;
    text-transform: none !important;
    letter-spacing: 0.02em !important;
    text-align: center !important;
    margin: 0 auto !important;
    min-width: 200px !important;
    max-width: 300px !important;
    height: auto !important;
    white-space: nowrap !important;
}

.gdrive-load-more-btn:hover {
    background: #6B0000;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 0, 0, 0.4);
}

.gdrive-load-more-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(139, 0, 0, 0.3);
}

/* Hidden items (for load more functionality) */
.gdrive-hidden-item {
    display: none;
}

/* Loading spinner */
.gdrive-masonry-gallery.loading {
    min-height: 200px;
    position: relative;
}

.gdrive-masonry-gallery.loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50px;
    height: 50px;
    margin: -25px 0 0 -25px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #4285f4;
    border-radius: 50%;
    animation: gdrive-gallery-spin 1s linear infinite;
}

@keyframes gdrive-gallery-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Gallery Navigation (for browsable mode) */
.gdrive-gallery-nav {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.gdrive-gallery-back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: #fff;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    color: #495057;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.gdrive-gallery-back-btn:hover {
    background: #e9ecef;
    border-color: #adb5bd;
}

.gdrive-gallery-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 14px;
    color: #6c757d;
}

.gdrive-gallery-breadcrumbs .breadcrumb-item {
    cursor: pointer;
    color: #4285f4;
    transition: color 0.2s;
}

.gdrive-gallery-breadcrumbs .breadcrumb-item:hover {
    color: #1a73e8;
    text-decoration: underline;
}

.gdrive-gallery-breadcrumbs .breadcrumb-separator {
    color: #adb5bd;
}

.gdrive-gallery-breadcrumbs .breadcrumb-current {
    color: #202124;
    font-weight: 500;
}

/* Responsive - Tablet */
@media (max-width: 1024px) {
    .gdrive-masonry-gallery {
        grid-template-columns: repeat(var(--gallery-columns-tablet), 1fr);
    }
}

/* Responsive - Mobile */
@media (max-width: 768px) {
    .gdrive-masonry-gallery {
        grid-template-columns: repeat(var(--gallery-columns-mobile), 1fr);
        gap: 15px;
    }
    
    .gdrive-lightbox-prev,
    .gdrive-lightbox-next {
        font-size: 28px;
        padding: 15px 10px;
    }
    
    .gdrive-lightbox-prev {
        left: 10px;
    }
    
    .gdrive-lightbox-next {
        right: 10px;
    }
    
    .gdrive-lightbox-close {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 24px;
    }
    
    .gdrive-gallery-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .gdrive-masonry-gallery .folder-item {
        padding: 20px 15px;
        min-height: 120px;
    }
    
    .gdrive-masonry-gallery .folder-item .folder-icon {
        font-size: 36px;
    }
}

/* Responsive - Small Mobile */
@media (max-width: 480px) {
    .gdrive-masonry-gallery {
        grid-template-columns: repeat(var(--gallery-columns-small), 1fr);
        gap: 10px;
    }
    
    .gdrive-masonry-gallery[data-columns="2"],
    .gdrive-masonry-gallery[data-columns="3"],
    .gdrive-masonry-gallery[data-columns="4"],
    .gdrive-masonry-gallery[data-columns="5"],
    .gdrive-masonry-gallery[data-columns="6"] {
        grid-template-columns: repeat(2, 1fr);
    }
}