/**
 * Portfolio Page Styles
 * Mosaic layout for photography portfolio
 */

.portfolio-filters {
    background: var(--color-bg-light);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: white;
    border: 2px solid var(--color-border);
    border-radius: 25px;
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.portfolio-main {
    padding: var(--spacing-2xl) 0;
}

.portfolio-mosaic {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    grid-auto-rows: 250px;
    gap: 1.5rem;
    grid-auto-flow: dense;
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    cursor: pointer;
    background: var(--color-bg-light);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

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

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.7) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-md);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.portfolio-overlay h3 {
    color: white;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
}

.portfolio-overlay p {
    color: rgba(255,255,255,0.9);
    font-size: var(--font-size-sm);
}

/* Mosaic Layout Variations */
.portfolio-item-large {
    grid-column: span 2;
    grid-row: span 2;
}

.portfolio-item-wide {
    grid-column: span 2;
}

.portfolio-item-tall {
    grid-row: span 2;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .portfolio-mosaic {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        grid-auto-rows: 150px;
        gap: 1rem;
    }
    
    .portfolio-item-large,
    .portfolio-item-wide {
        grid-column: span 1;
    }
    
    .portfolio-item-tall {
        grid-row: span 1;
    }
}

/* Portfolio item hidden state */
.portfolio-item.hidden {
    display: none;
}

/* Loading state */
.portfolio-mosaic.loading {
    opacity: 0.5;
    pointer-events: none;
}