/* Portfolio page specific styles */

/* Portfolio Header */
.portfolio-header {
    padding: 120px var(--spacing-lg) var(--spacing-xl);
    text-align: center;
    background: var(--color-bg-primary);
}

.portfolio-header h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-family: var(--font-serif);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.portfolio-header p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
}

/* Category Filters */
.portfolio-filters {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--color-bg-primary);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--color-text-secondary);
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 200ms ease;
    border-radius: 2px;
}

.filter-btn:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg-primary);
    transform: translateY(-2px);
}

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

/* Portfolio Gallery - Full-screen Immersive Layout */
.portfolio-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 0;
    width: 100%;
    min-height: 100vh;
    background: var(--color-text-primary);
}

@media (min-width: 768px) {
    .portfolio-gallery {
        grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    }
}

@media (min-width: 1024px) {
    .portfolio-gallery {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Gallery Item */
.gallery-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 1 / 1;
    cursor: pointer;
    transition: opacity 400ms ease, transform 400ms ease;
}

.gallery-item.hidden {
    display: none;
}

.gallery-item.filtering {
    opacity: 0;
    transform: scale(0.95);
}

.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 600ms ease, opacity 300ms ease;
}

.gallery-item:hover .gallery-image {
    transform: scale(1.05);
}

/* Gallery Caption */
.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: var(--color-bg-primary);
    font-family: var(--font-serif);
    font-size: 1.125rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 300ms ease, transform 300ms ease;
}

.gallery-item:hover .gallery-caption {
    opacity: 1;
    transform: translateY(0);
}

/* Lazy Loading State */
.lazy-image {
    opacity: 0;
    transition: opacity 600ms ease;
}

.lazy-image.loaded {
    opacity: 1;
}

/* Responsive Adjustments */
@media (max-width: 767px) {
    .portfolio-header {
        padding: 100px var(--spacing-md) var(--spacing-lg);
    }

    .portfolio-filters {
        padding: var(--spacing-lg) var(--spacing-md);
        gap: var(--spacing-sm);
    }

    .filter-btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.75rem;
    }

    .portfolio-gallery {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .gallery-caption {
        font-size: 1rem;
        padding: var(--spacing-md);
    }
}