/* ========================================
   San Thit Hein Portfolio - Gallery Styles
   ======================================== */

/* Gallery Filter */
.gallery-filter {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 12px 28px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-text-secondary);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 30px;
    transition: all var(--transition-normal);
    box-shadow: var(--elevation-1);
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--color-ripple);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.filter-btn:hover::before {
    width: 300px;
    height: 300px;
}

.filter-btn:hover {
    color: var(--color-text);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

.filter-btn.active {
    background: var(--color-accent);
    color: var(--color-bg);
    border-color: var(--color-accent);
    box-shadow: 0 4px 20px rgba(201, 169, 98, 0.4);
}

.filter-btn.active::before {
    display: none;
}

/* Gallery Section Headers (when filtering) */
.gallery-section-header {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px 0 20px;
}

.gallery-section-header h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--color-text);
    margin-bottom: 10px;
}

.gallery-section-header p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-md);
    cursor: pointer;
    aspect-ratio: 1;
    background: var(--color-bg-secondary);
    box-shadow: var(--elevation-2);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.gallery-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--elevation-4);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.8) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        transparent 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 25px;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.gallery-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-accent);
    margin-bottom: 10px;
}

.gallery-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 50px;
    height: 50px;
    border: 2px solid var(--color-text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-text);
    transition: transform var(--transition-normal);
}

.gallery-item:hover .gallery-icon {
    transform: translate(-50%, -50%) scale(1);
}

/* Gallery Item Variations */
.gallery-item:nth-child(5n + 1) {
    grid-row: span 2;
    aspect-ratio: auto;
}

.gallery-item:nth-child(7n + 3) {
    grid-column: span 2;
}

/* Hidden state for filtering */
.gallery-item.hidden {
    display: none;
}

/* Animation for filtering */
.gallery-item.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.gallery-item.fade-out {
    animation: fadeOut 0.3s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.9);
    }
}

/* ========================================
   Lightbox
   ======================================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

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

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transition: transform var(--transition-normal);
}

.lightbox.active .lightbox-content img {
    animation: lightboxZoom 0.3s ease forwards;
}

@keyframes lightboxZoom {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.lightbox-caption {
    margin-top: 20px;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-align: center;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    color: var(--color-text);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(201, 169, 98, 0.3);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10001;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.lightbox-close:hover {
    color: var(--color-bg);
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 6px 25px rgba(201, 169, 98, 0.4);
}

.lightbox-close:active {
    transform: rotate(90deg) scale(0.95);
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(201, 169, 98, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10001;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.lightbox-prev {
    left: 30px;
}

.lightbox-next {
    right: 30px;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 25px rgba(201, 169, 98, 0.4);
}

.lightbox-prev:active,
.lightbox-next:active {
    transform: translateY(-50%) scale(0.95);
}

.lightbox-prev svg,
.lightbox-next svg {
    width: 24px;
    height: 24px;
    transition: transform 0.2s ease;
}

.lightbox-prev:hover svg {
    transform: translateX(-3px);
}

.lightbox-next:hover svg {
    transform: translateX(3px);
}

.lightbox-counter {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    color: var(--color-text);
    letter-spacing: 3px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 30px;
    border: 1px solid rgba(201, 169, 98, 0.2);
}

/* ========================================
   Gallery Responsive
   ======================================== */
@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
    
    .gallery-item:nth-child(5n + 1),
    .gallery-item:nth-child(7n + 3) {
        grid-row: span 1;
        grid-column: span 1;
    }
    
    .gallery-item:nth-child(4n + 1) {
        grid-row: span 2;
    }
}

@media (max-width: 768px) {
    .gallery-filter {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 8px 18px;
        font-size: 0.7rem;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .gallery-item:nth-child(4n + 1) {
        grid-row: span 1;
    }
    
    .gallery-item:nth-child(3n + 1) {
        grid-row: span 2;
    }
    
    .gallery-overlay {
        padding: 15px;
    }
    
    .gallery-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .lightbox-prev,
    .lightbox-next {
        width: 44px;
        height: 44px;
    }
    
    .lightbox-prev {
        left: 15px;
    }
    
    .lightbox-next {
        right: 15px;
    }
    
    .lightbox-close {
        top: 15px;
        right: 15px;
        width: 44px;
        height: 44px;
    }
    
    .lightbox-counter {
        bottom: 20px;
        padding: 8px 16px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .filter-btn {
        padding: 8px 15px;
        font-size: 0.65rem;
        letter-spacing: 1px;
    }
    
    .gallery-grid {
        gap: 8px;
    }
    
    .gallery-item:nth-child(3n + 1) {
        grid-row: span 1;
    }
    
    .gallery-category {
        font-size: 0.65rem;
    }
    
    /* Mobile lightbox navigation - bottom positioned */
    .lightbox-content {
        max-height: 75vh;
    }
    
    .lightbox-prev,
    .lightbox-next {
        top: auto;
        bottom: 90px;
        transform: none;
        width: 50px;
        height: 50px;
    }
    
    .lightbox-prev {
        left: 20%;
        transform: translateX(-50%);
    }
    
    .lightbox-next {
        right: 20%;
        left: auto;
        transform: translateX(50%);
    }
    
    .lightbox-prev:hover,
    .lightbox-next:hover {
        transform: translateX(-50%) scale(1.05);
    }
    
    .lightbox-next:hover {
        transform: translateX(50%) scale(1.05);
    }
    
    .lightbox-counter {
        bottom: 25px;
    }
    
    .lightbox-close {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }
}