/* ============================================
   LED Союз — Portfolio Page Styles
   ============================================ */

.portfolio-hero {
    position: relative;
    overflow: hidden;
    text-align: center;
    padding-bottom: var(--space-3xl);
    background: var(--bg-primary);
    margin-top: calc(-1 * var(--header-height));
    padding-top: calc(var(--header-height) + var(--section-padding));
}

/* Filter */
.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

.filter-btn {
    padding: 8px 20px;
    border-radius: var(--radius-pill);
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.04);
    border: var(--border-subtle);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.filter-btn:hover,
.filter-btn.active {
    color: var(--text-primary);
    background: rgba(0, 191, 255, 0.1);
    border-color: rgba(0, 191, 255, 0.3);
}

/* Gallery Slider */
.gallery-slider {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    gap: var(--space-md);
    padding-bottom: var(--space-lg);
    -webkit-overflow-scrolling: touch;
}

.gallery-slider::-webkit-scrollbar {
    height: 8px;
}

.gallery-slider::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.gallery-slider::-webkit-scrollbar-thumb {
    background: var(--gradient-brand);
    border-radius: 4px;
}

.gallery-slider .gallery-item {
    scroll-snap-align: start;
    flex: 0 0 85%;
    min-width: 280px;
    max-width: 800px;
}

@media (min-width: 768px) {
    .gallery-slider .gallery-item {
        flex: 0 0 60%;
    }
}

@media (min-width: 1024px) {
    .gallery-slider .gallery-item {
        flex: 0 0 45%;
    }
}

.cases-section {
    margin-top: 4rem;
    padding: var(--space-2xl) var(--space-xl);
    background: var(--gradient-card);
    border: var(--border-card);
    border-radius: var(--radius-xl);
    text-align: center;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 4/3;
}

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

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

.gallery-item__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(10, 14, 23, 0.9) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-lg);
}

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

.gallery-item__title {
    font-size: var(--fs-body);
    font-weight: var(--fw-semibold);
    margin-bottom: var(--space-xs);
}

.gallery-item__location {
    font-size: var(--fs-small);
    color: var(--text-secondary);
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: var(--z-popup);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.lightbox__close {
    position: absolute;
    top: var(--space-xl);
    right: var(--space-xl);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.lightbox__close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.lightbox__nav:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox__nav--prev {
    left: var(--space-xl);
}

.lightbox__nav--next {
    right: var(--space-xl);
}

/* Dzen Cards */
.dzen-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
    text-align: left;
}

.dzen-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    border: var(--border-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    text-decoration: none;
    color: inherit;
}

.dzen-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--glow-card);
    border-color: rgba(0, 191, 255, 0.3);
}

.dzen-card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.dzen-card__content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.dzen-card__title {
    font-size: var(--fs-h4);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.dzen-card__footer {
    margin-top: auto;
    font-size: var(--fs-small);
    color: var(--color-blue);
    font-family: var(--font-display);
    font-weight: var(--fw-bold);
    display: flex;
    align-items: center;
    gap: 8px;
}