/*
=====================================
GALLERY PAGE STYLES
=====================================

Responsive gallery layout with dynamic grid and lightbox functionality
*/

/* =============
   GALLERY HERO
   ============= */
.gallery-hero {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
    padding: var(--space-4xl) 0 var(--space-2xl);
    text-align: center;
}

.gallery-hero .hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.gallery-hero .hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* =============
   GALLERY CONTROLS
   ============= */
.gallery-controls {
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-lg) 0;
}

.controls-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.content-sources {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.source-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color 0.3s ease;
}

.source-toggle:hover {
    color: var(--color-text-primary);
}

.source-toggle input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    height: 20px;
    width: 20px;
    background-color: var(--color-bg-primary);
    border: 2px solid var(--color-border-medium);
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
}

.source-toggle input:checked ~ .checkmark {
    background-color: var(--color-brand-primary);
    border-color: var(--color-brand-primary);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.source-toggle input:checked ~ .checkmark:after {
    display: block;
}

.gallery-actions {
    display: flex;
    gap: var(--space-sm);
}

.refresh-icon {
    display: inline-block;
    transition: transform 0.3s ease;
}

.btn:hover .refresh-icon {
    transform: rotate(180deg);
}

/* =============
   GALLERY CONTENT
   ============= */
.gallery-content {
    padding: var(--space-2xl) 0;
}

/* Loading State */
.gallery-loading {
    text-align: center;
    padding: var(--space-4xl) 0;
    color: var(--color-text-secondary);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border-light);
    border-top: 3px solid var(--color-brand-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-lg);
}

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

/* Error State */
.gallery-error {
    text-align: center;
    padding: var(--space-4xl) 0;
    max-width: 500px;
    margin: 0 auto;
}

.error-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-lg);
}

.gallery-error h3 {
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.gallery-error p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.gallery-item {
    background: var(--color-bg-primary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.gallery-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-interactive);
}

.gallery-item-media {
    width: 100%;
    height: 250px;
    overflow: hidden;
    position: relative;
    background-color: var(--color-neutral-100);
}

.gallery-item-media img,
.gallery-item-media video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-item-media img,
.gallery-item:hover .gallery-item-media video {
    transform: scale(1.05);
}

.gallery-item-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.3) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: flex-end;
    padding: var(--space-lg);
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
}

.gallery-item-type {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: rgba(0,0,0,0.7);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.gallery-item-info {
    padding: var(--space-lg);
}

.gallery-item-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.gallery-item-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gallery-item-date {
    opacity: 0.8;
}

.gallery-item-size {
    opacity: 0.6;
}

/* Pagination */
.gallery-pagination {
    text-align: center;
    padding: var(--space-xl) 0;
}

/* =============
   LIGHTBOX MODAL
   ============= */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.lightbox-container {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    max-width: 100%;
    max-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content img,
.lightbox-content video {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--border-radius);
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: 0;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    padding: var(--space-sm);
    transition: opacity 0.3s ease;
    z-index: 1001;
}

.lightbox-close:hover {
    opacity: 0.7;
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    padding: 0 var(--space-lg);
}

.lightbox-nav-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 2rem;
    padding: var(--space-lg);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    pointer-events: auto;
    backdrop-filter: blur(10px);
}

.lightbox-nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.lightbox-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.lightbox-nav-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: none;
}

/* =============
   RESPONSIVE DESIGN
   ============= */

/* Tablet */
@media (max-width: 768px) {
    .gallery-hero .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .controls-row {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
    }
    
    .content-sources {
        justify-content: center;
    }
    
    .gallery-actions {
        justify-content: center;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--space-md);
    }
    
    .lightbox-nav {
        padding: 0 var(--space-sm);
    }
    
    .lightbox-nav-btn {
        font-size: 1.5rem;
        padding: var(--space-md);
    }
}

/* Mobile */
@media (max-width: 480px) {
    .gallery-hero {
        padding: var(--space-2xl) 0 var(--space-lg);
    }
    
    .gallery-hero .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .gallery-item-media {
        height: 200px;
    }
    
    .lightbox-container {
        max-width: 95vw;
        max-height: 95vh;
    }
    
    .lightbox-close {
        top: -40px;
        font-size: 1.5rem;
    }
    
    .lightbox-nav-btn {
        font-size: 1.2rem;
        padding: var(--space-sm);
    }
}

/* =============
   ACCESSIBILITY
   ============= */
@media (prefers-reduced-motion: reduce) {
    .gallery-item,
    .gallery-item-media img,
    .gallery-item-media video,
    .lightbox-overlay,
    .loading-spinner {
        transition: none;
        animation: none;
    }
    
    .gallery-item:hover {
        transform: none;
    }
    
    .gallery-item:hover .gallery-item-media img,
    .gallery-item:hover .gallery-item-media video {
        transform: none;
    }
}

/* Focus states for keyboard navigation */
.gallery-item:focus,
.source-toggle:focus,
.lightbox-close:focus,
.lightbox-nav-btn:focus {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: 2px;
}