/* Portfolio Ottimizzato - Stili Aggiuntivi
   Aggiungi questo file dopo style.css oppure copia il contenuto in style.css
*/

/* Portfolio Filters */
.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 3rem;
    padding: 0 1rem;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: white;
    border: 2px solid var(--border-color, #e5e7eb);
    border-radius: 50px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary, #374151);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.filter-btn svg {
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.filter-btn .count {
    font-size: 0.85rem;
    opacity: 0.6;
}

.filter-btn:hover {
    border-color: var(--primary-color, #b91c1c);
    color: var(--primary-color, #b91c1c);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(185, 28, 28, 0.15);
}

.filter-btn:hover svg {
    opacity: 1;
}

.filter-btn.active {
    background: var(--primary-color, #b91c1c);
    border-color: var(--primary-color, #b91c1c);
    color: white;
    box-shadow: 0 4px 16px rgba(185, 28, 28, 0.3);
}

.filter-btn.active svg {
    opacity: 1;
}

/* Portfolio Gallery */
.portfolio-gallery {
    padding: 4rem 0;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-grid.loaded {
    opacity: 1;
}

.portfolio-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding: 2rem 1.5rem 1.5rem;
    color: white;
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
}

.portfolio-overlay h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: white;
}

.portfolio-overlay p {
    font-size: 0.9rem;
    opacity: 0.9;
    margin: 0;
}

/* Load More Container */
.load-more-container {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
    padding: 2rem 0;
}

#loadMoreBtn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 2rem;
}

.lightbox.active {
    opacity: 1;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-caption {
    color: white;
    font-size: 1.1rem;
    text-align: center;
    margin: 0;
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: 0;
    background: white;
    color: black;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-close:hover {
    background: var(--primary-color, #b91c1c);
    color: white;
    transform: rotate(90deg);
}

/* Responsive */
@media (max-width: 768px) {
    .portfolio-filters {
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .filter-btn svg {
        display: none;
    }

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

    .lightbox {
        padding: 1rem;
    }

    .lightbox-close {
        top: -40px;
        width: 35px;
        height: 35px;
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .portfolio-filters {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .filter-btn {
        justify-content: center;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Empty state */
.portfolio-empty {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-tertiary, #6b7280);
}

.portfolio-empty svg {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.portfolio-empty h3 {
    font-size: 1.5rem;
    color: var(--text-secondary, #374151);
    margin-bottom: 0.5rem;
}