.portfolio-filters {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-bottom: 60px;
        }

        .portfolio-filter-btn {
            padding: 10px 24px;
            font-size: 0.85rem;
            font-weight: 500;
            font-family: var(--font-primary);
            color: var(--text-muted);
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 100px;
            cursor: pointer;
            transition: var(--transition-fast);
        }

        .portfolio-filter-btn:hover,
        .portfolio-filter-btn.active {
            color: var(--text-primary);
            border-color: var(--accent-primary);
            background: rgba(99, 102, 241, 0.1);
        }

        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .portfolio-card {
            position: relative;
            border-radius: var(--border-radius);
            overflow: hidden;
            aspect-ratio: 4/3;
            cursor: pointer;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            text-decoration: none;
            display: block;
            transition: var(--transition-smooth);
        }

        .portfolio-card:hover {
            transform: translateY(-8px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-lg);
        }

        .portfolio-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.8s var(--ease-out-expo), filter 0.4s ease;
        }

        .portfolio-card:hover img {
            transform: scale(1.06);
            filter: brightness(0.7);
        }

        .portfolio-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.1) 50%, transparent 100%);
            z-index: 1;
            transition: var(--transition-smooth);
        }

        .portfolio-card:hover::after {
            background: linear-gradient(to top, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.4) 60%, rgba(0, 0, 0, 0.3) 100%);
        }

        .portfolio-card-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 28px;
            z-index: 2;
        }

        .portfolio-card-category {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--accent-secondary);
            margin-bottom: 8px;
        }

        .portfolio-card-content h3 {
            font-size: 1.25rem;
            color: #fff;
            margin-bottom: 8px;
            transition: color 0.3s ease;
        }

        .portfolio-card:hover .portfolio-card-content h3 {
            color: var(--accent-secondary);
        }

        .portfolio-card-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            max-height: 0;
            opacity: 0;
            overflow: hidden;
            transition: max-height 0.5s var(--ease-out-expo), opacity 0.4s ease;
            line-height: 1.6;
        }

        .portfolio-card:hover .portfolio-card-content p {
            max-height: 100px;
            opacity: 1;
        }

        .portfolio-view-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-secondary);
            max-height: 0;
            opacity: 0;
            overflow: hidden;
            margin-top: 0;
            transition: max-height 0.5s var(--ease-out-expo), opacity 0.4s ease 0.1s, margin-top 0.4s ease;
        }

        .portfolio-card:hover .portfolio-view-cta {
            max-height: 40px;
            opacity: 1;
            margin-top: 12px;
        }

        .portfolio-view-cta svg {
            width: 14px;
            height: 14px;
        }

        /* Featured / large cards */
        .portfolio-card.featured {
            grid-column: span 2;
            aspect-ratio: 16/9;
        }

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

            .portfolio-card.featured {
                grid-column: span 2;
            }
        }

        @media (max-width: 768px) {
            .portfolio-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .portfolio-card.featured {
                grid-column: span 1;
            }

            .portfolio-card {
                aspect-ratio: 16/10;
            }
        }