/* Global Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f5f5f5;
            color: #333;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* Header */
        header {
            background: linear-gradient(135deg, #000000, #434343);
            color: white;
            padding: 20px 0;
            text-align: center;
        }
        
        .logo {
            font-size: 2rem;
            font-weight: bold;
            margin-bottom: 10px;
        }
        
        .tagline {
            opacity: 0.8;
        }
        
        /* Navigation */
        nav {
            background-color: #25D366;
            padding: 15px 0;
        }
        
        .nav-links {
            display: flex;
            justify-content: center;
            list-style: none;
            gap: 30px;
        }
        
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1rem;
            transition: all 0.3s;
        }
        
        .nav-links a:hover {
            opacity: 0.8;
        }
        
        /* Gallery Section */
        .gallery-section {
            padding: 40px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 30px;
            font-size: 2rem;
            color: #333;
        }
        
        .categories {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }
        
        .category-btn {
            background: white;
            border: 2px solid #25D366;
            color: #25D366;
            padding: 8px 20px;
            border-radius: 30px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.3s;
        }
        
        .category-btn.active, .category-btn:hover {
            background: #25D366;
            color: white;
        }
        
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
        }
        
        .shoe-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s;
            position: relative;
        }
        
        .shoe-card:hover {
            transform: translateY(-10px);
        }
        
        .shoe-img {
            height: 200px;
            overflow: hidden;
        }
        
        .shoe-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .shoe-card:hover .shoe-img img {
            transform: scale(1.1);
        }
        
        .shoe-info {
            padding: 15px;
        }
        
        .shoe-name {
            font-size: 1.1rem;
            margin-bottom: 5px;
        }
        
        .shoe-collection {
            color: #777;
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        
        .select-btn {
            background: #25D366;
            color: white;
            border: none;
            padding: 8px 15px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            width: 100%;
            transition: background 0.3s;
        }
        
        .select-btn:hover {
            background: #128C7E;
        }
        
        /* Selection Panel */
        .selection-panel {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: white;
            box-shadow: 0 -5px 15px rgba(0,0,0,0.1);
            padding: 15px;
            transform: translateY(100%);
            transition: transform 0.3s;
            z-index: 1000;
        }
        
        .selection-panel.active {
            transform: translateY(0);
        }
        
        .panel-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .close-panel {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #777;
        }
        
        .selected-items {
            display: flex;
            gap: 10px;
            overflow-x: auto;
            padding-bottom: 10px;
        }
        
        .selected-item {
            min-width: 80px;
            position: relative;
        }
        
        .selected-item img {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: 5px;
        }
        
        .remove-item {
            position: absolute;
            top: -5px;
            right: -5px;
            background: red;
            color: white;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            cursor: pointer;
            border: none;
        }
        
        .send-btn {
            background: #25D366;
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 30px;
            font-weight: bold;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 15px auto 0;
            transition: background 0.3s;
        }
        
        .send-btn:hover {
            background: #128C7E;
        }
        
        /* Footer */
        footer {
            background: #333;
            color: white;
            text-align: center;
            padding: 30px 0;
            margin-top: 50px;
        }
        
        .social-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin: 20px 0;
        }
        
        .social-links a {
            color: white;
            font-size: 1.5rem;
            transition: color 0.3s;
        }
        
        .social-links a:hover {
            color: #25D366;
        }
        
        .copyright {
            opacity: 0.7;
            font-size: 0.9rem;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .gallery-grid {
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            }
            
            .nav-links {
                gap: 15px;
                flex-wrap: wrap;
            }
        }