/* ============================================
   USK DESIGN STUDIOS - PORTFOLIO PAGE STYLES
   ============================================ */

/* Portfolio Page Body */
.portfolio-page {
    background: var(--color-off-white);
}

/* Portfolio Hero */
.portfolio-hero {
    padding: 180px 0 80px;
    background: var(--color-primary);
    text-align: center;
}

.portfolio-hero .page-title {
    font-size: clamp(3rem, 6vw, 5rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.portfolio-hero .page-subtitle {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-style: italic;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto;
}

/* Portfolio Filter */
.portfolio-filter {
    padding: var(--spacing-lg) 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-light);
    position: sticky;
    top: 80px;
    z-index: 100;
}

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

.filter-btn {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--color-gray-light);
    background: transparent;
    color: var(--color-gray-dark);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

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

/* Portfolio Gallery */
.portfolio-gallery {
    padding: var(--spacing-xl) 0 var(--spacing-xxl);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.gallery-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    height: 400px;
}

.gallery-item.large {
    grid-column: span 2;
    height: 500px;
}

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

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

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.9) 0%,
        rgba(0, 0, 0, 0.4) 40%,
        rgba(0, 0, 0, 0.1) 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-lg);
    opacity: 0;
    transition: var(--transition-medium);
}

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

.gallery-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.gallery-title {
    font-size: 1.5rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.gallery-description {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

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

/* Portfolio CTA */
.portfolio-cta-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-primary);
    text-align: center;
}

.portfolio-cta-section .cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.portfolio-cta-section .cta-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

/* Lightbox Styles */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: 0;
    font-size: 2rem;
    color: var(--color-white);
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    transition: var(--transition-fast);
}

.lightbox-close:hover {
    color: var(--color-accent);
}

.lightbox-caption {
    text-align: center;
    margin-top: var(--spacing-md);
}

.lightbox-category {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.lightbox-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-white);
}

/* Responsive */
@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gallery-item {
        height: 350px;
    }

    .gallery-item.large {
        grid-column: span 2;
        height: 400px;
    }
}

@media (max-width: 768px) {
    .portfolio-hero {
        padding: 140px 0 60px;
    }

    .portfolio-filter {
        top: 70px;
    }

    .filter-buttons {
        gap: var(--spacing-xs);
    }

    .filter-btn {
        font-size: 0.75rem;
        padding: 0.5rem 1rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .gallery-item,
    .gallery-item.large {
        grid-column: span 1;
        height: 300px;
    }

    .gallery-overlay {
        opacity: 1;
        background: linear-gradient(
            to top,
            rgba(0, 0, 0, 0.8) 0%,
            rgba(0, 0, 0, 0.2) 60%,
            transparent 100%
        );
    }

    .gallery-title {
        font-size: 1.25rem;
    }

    .gallery-description {
        font-size: 0.85rem;
    }
}