/* References Page Specific Styles */

.references-hero {
    padding-top: 200px;
    padding-bottom: 80px;
    background: linear-gradient(135deg, var(--accent-color), #e9ecef);
}

.references-hero h1 {
    margin-bottom: 3rem !important;
}

.references-hero .section-divider {
    margin-bottom: 3rem !important;
}

.references-hero p {
    margin-bottom: 3rem !important;
}

/* Filter Section */
.filter-section {
    position: sticky;
    top: 80px;
    z-index: 100;
    background: rgba(248, 249, 250, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.filter-controls .btn-group {
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-controls .btn {
    border-radius: 25px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.filter-controls .btn:hover,
.filter-controls .btn.active {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.filter-controls .btn:focus {
    box-shadow: 0 0 0 0.2rem rgba(228, 41, 34, 0.25);
}

/* Region Headers */
.region-header {
    margin-bottom: 3rem;
}

.region-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.region-title i {
    color: var(--primary-color);
}

/* Project Cards */
.project-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
    height: 100%;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.project-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(228, 41, 34, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-overlay i {
    color: var(--white);
    font-size: 2rem;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-info {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.project-year {
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.project-description {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

/* Project Gallery Thumbnails */
.project-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-top: 1rem;
}

.gallery-thumb {
    display: block;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 8px;
    transition: var(--transition);
}

.gallery-thumb:hover {
    transform: scale(1.1);
}

.gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Lightbox Customization */
.lb-data .lb-caption {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    color: var(--text-dark);
}

.lb-nav a.lb-prev,
.lb-nav a.lb-next {
    opacity: 0.8;
}

.lb-nav a.lb-prev:hover,
.lb-nav a.lb-next:hover {
    opacity: 1;
}

.lb-closeContainer .lb-close {
    opacity: 0.8;
}

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

/* Responsive Design */
@media (max-width: 991.98px) {
    .filter-controls .btn-group {
        justify-content: center;
    }
    
    .region-title {
        font-size: 2rem;
    }
    
    .project-gallery {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 767.98px) {
    .references-hero {
        padding-top: 100px;
    }
    
    .filter-section {
        top: 70px;
    }
    
    .filter-controls .btn {
        padding: 0.4rem 1rem;
        font-size: 0.9rem;
    }
    
    .region-title {
        font-size: 1.75rem;
    }
    
    .project-info {
        padding: 1.25rem;
    }
    
    .project-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 575.98px) {
    .filter-controls .btn-group {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-controls .btn {
        width: 100%;
        max-width: 250px;
    }
    
    .region-title {
        font-size: 1.5rem;
    }
    
    .project-gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.25rem;
    }
    
    .project-info {
        padding: 1rem;
    }
}

/* Animation Classes */
.project-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.project-item.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.project-item:nth-child(1) { transition-delay: 0.1s; }
.project-item:nth-child(2) { transition-delay: 0.2s; }
.project-item:nth-child(3) { transition-delay: 0.3s; }
.project-item:nth-child(4) { transition-delay: 0.4s; }
.project-item:nth-child(5) { transition-delay: 0.5s; }
.project-item:nth-child(6) { transition-delay: 0.6s; }

/* Loading States */
.project-image.loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Accessibility Improvements */
.project-card:focus-within {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

.gallery-thumb:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 1px;
}

/* Print Styles */
@media print {
    .filter-section,
    .project-overlay,
    .project-gallery {
        display: none;
    }
    
    .project-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .project-image {
        max-height: 200px;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .project-card {
        border: 2px solid var(--text-dark);
    }
    
    .project-overlay {
        background: rgba(0, 0, 0, 0.9);
    }
    
    .filter-controls .btn {
        border-width: 3px;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .project-card,
    .project-image img,
    .project-overlay,
    .gallery-thumb,
    .project-item {
        transition: none;
    }
    
    .project-item {
        opacity: 1;
        transform: none;
    }
}

/* Modal Styles */
.modal-xl {
    max-width: 90%;
}

.project-gallery-modal .main-image-container {
    text-align: center;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
}

.project-gallery-modal .main-image-container img {
    max-height: 500px;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.thumbnail-gallery {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.thumbnail-gallery .gallery-thumb {
    width: 80px;
    height: 80px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
}

.thumbnail-gallery .gallery-thumb:hover {
    border-color: #007bff;
    transform: scale(1.05);
}

.thumbnail-gallery .gallery-thumb.active {
    border-color: #007bff;
    box-shadow: 0 0 10px rgba(0,123,255,0.3);
}

/* Ensure modal is visible */
.modal {
    z-index: 1050;
}

.modal-backdrop {
    z-index: 1040;
}

/* Make grid tiles clickable */
.project-card {
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}