/* ===========================
   PORTFOLIO PAGE STYLES
   =========================== */

.page-header {
    padding: 150px 0 80px;
    text-align: center;
    background: linear-gradient(135deg, var(--color-light) 0%, var(--color-white) 100%);
}

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

.page-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   GALLERY NAVIGATION/FILTERS
   =========================== */
.gallery-nav {
    padding: var(--spacing-md) 0;
    background-color: var(--color-white);
    position: sticky;
    top: 80px;
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

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

.filter-btn {
    padding: 0.75rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-text-light);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

/* ===========================
   GALLERY SECTIONS
   =========================== */
.gallery-section {
    padding: var(--spacing-xl) 0;
    opacity: 1;
    transition: opacity 0.4s ease;
}

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

.gallery-title {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.gallery-description {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 700px;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.gallery-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 3/4;
    transition: transform var(--transition-smooth);
}

.gallery-item:hover {
    transform: scale(1.02);
}

.gallery-item .image-placeholder {
    width: 100%;
    height: 100%;
    min-height: auto;
    transition: transform var(--transition-slow);
}

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

/* Lightbox overlay (optional enhancement) */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: var(--spacing-md);
}

.lightbox.active {
    display: flex;
}

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

.lightbox-image {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    font-size: 2rem;
    color: var(--color-white);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    transition: transform var(--transition-fast);
}

.lightbox-close:hover {
    transform: scale(1.1);
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */
@media (max-width: 768px) {
    .gallery-nav {
        top: 70px;
    }
    
    .gallery-filters {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
}