:root {
            --teal-primary: #008080;
            --teal-dark: #006666;
            --teal-light: #00a3a3;
            --teal-lighter: #e0f2f2;
            --white: #ffffff;
            --gray-light: #f5f5f5;
            --gray-dark: #333333;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: var(--gray-light);
            color: var(--gray-dark);
            line-height: 1.6;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 50px;
            margin-top: 100px;
        }
        
        /* Portfolio Section */
        .portfolio {
            padding: 80px 0;
            background-color: var(--white);
            margin-top: 90px;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--teal-primary);
            margin-bottom: 15px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        
        .section-title p {
            font-size: 1.1rem;
            color: var(--gray-dark);
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* Filter Buttons */
        .portfolio-filter {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 40px;
        }
        
        .filter-btn {
            padding: 10px 25px;
            background: transparent;
            border: 2px solid var(--teal-primary);
            color: var(--teal-primary);
            font-weight: 600;
            border-radius: 30px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .filter-btn:hover, .filter-btn.active {
            background: var(--teal-primary);
            color: var(--white);
        }
        
        /* Portfolio Grid */
        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
        }
        
        .portfolio-item {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .portfolio-item:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 128, 128, 0.2);
        }
        
        .portfolio-img {
            width: 100%;
            height: 250px;
            object-fit: cover;
            display: block;
        }
        
        .portfolio-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(0, 128, 128, 0.9), transparent);
            color: var(--white);
            padding: 30px 20px;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        
        .portfolio-overlay h3 {
            font-size: 1.5rem;
            margin-bottom: 10px;
        }
        
        .portfolio-overlay p {
            margin-bottom: 20px;
            font-size: 0.95rem;
        }
        
        .btn {
            display: inline-block;
            padding: 8px 20px;
            background: var(--white);
            color: var(--teal-primary);
            text-decoration: none;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        
        .btn:hover {
            background: var(--teal-dark);
            color: var(--white);
        }
        
        /* Category Badge */
        .category-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--teal-primary);
            color: var(--white);
            padding: 5px 15px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            z-index: 1;
        }
        
        /* Modal Styles */
        .modal {
            display: none;
            position: fixed;
            z-index: 100;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0, 0, 0, 0.8);
        }
        
        .modal-content {
            background-color: var(--white);
            margin: 5% auto;
            padding: 30px;
            border-radius: 10px;
            max-width: 800px;
            width: 90%;
            position: relative;
        }
        
        .close-btn {
            position: absolute;
            top: 15px;
            right: 25px;
            color: var(--gray-dark);
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
        }
        
        .close-btn:hover {
            color: var(--teal-primary);
        }
        
        /* Responsive Design */
        @media (max-width: 992px) {
            .portfolio-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }
        
        @media (max-width: 768px) {
            .section-title h2 {
                font-size: 2rem;
            }
            
            .portfolio-filter {
                gap: 8px;
            }
            
            .filter-btn {
                padding: 8px 20px;
                font-size: 0.9rem;
            }
        }
        
        @media (max-width: 576px) {
            .portfolio {
                padding: 60px 0;
            }
            
            .section-title h2 {
                font-size: 1.8rem;
            }
            
            .portfolio-grid {
                grid-template-columns: 1fr;
            }
            
            .portfolio-item {
                max-width: 100%;
            }
        }