* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
            color: #333;
            min-height: 100vh;
            padding: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            overflow: hidden;
            margin: 20px 0;
        }
        
        header {
            background: #4a6fc7;
            color: white;
            padding: 20px;
            text-align: center;
        }
        
        h1 {
            font-size: 2.2rem;
            margin-bottom: 10px;
        }
        
        .subtitle {
            font-size: 1rem;
            opacity: 0.9;
        }
        
        .main-content {
            display: flex;
            flex-wrap: wrap;
            padding: 20px;
            gap: 20px;
        }
        
        .left-panel {
            flex: 1;
            min-width: 300px;
            background: #f5f7ff;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }
        
        .right-panel {
            flex: 2;
            min-width: 300px;
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }
        
        .upload-section {
            border: 2px dashed #4a6fc7;
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            margin-bottom: 20px;
            transition: all 0.3s;
            cursor: pointer;
        }
        
        .upload-section:hover {
            background: #e8eeff;
        }
        
        .upload-icon {
            font-size: 3rem;
            color: #4a6fc7;
            margin-bottom: 15px;
        }
        
        .btn {
            background: #4a6fc7;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 50px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin: 5px;
        }
        
        .btn:hover {
            background: #3b5bb0;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        }
        
        .btn:disabled {
            background: #cccccc;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }
        
        .btn i {
            margin-right: 8px;
        }
        
        .rename-section {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 20px 0;
            align-items: center;
        }
        
        .rename-input {
            flex: 1;
            min-width: 200px;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: 50px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
        }
        
        .rename-input:focus {
            border-color: #4a6fc7;
        }
        
        .image-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 15px;
            margin-top: 20px;
            max-height: 500px;
            overflow-y: auto;
            padding: 10px;
        }
        
        .image-item {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            cursor: grab;
            transition: transform 0.3s;
        }
        
        .image-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
        }
        
        .image-item img {
            width: 100%;
            height: 120px;
            object-fit: cover;
            display: block;
        }
        
        .image-name {
            padding: 8px;
            font-size: 0.8rem;
            text-align: center;
            background: #f8f9fa;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        
        .remove-btn {
            position: absolute;
            top: 5px;
            right: 5px;
            background: rgba(255, 0, 0, 0.7);
            color: white;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 0.8rem;
            transition: all 0.3s;
        }
        
        .remove-btn:hover {
            background: rgba(255, 0, 0, 1);
            transform: scale(1.1);
        }
        
        .action-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }
        
        .preview-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.9);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }
        
        .modal-content {
            max-width: 90%;
            max-height: 90%;
        }
        
        .modal-content img {
            max-width: 100%;
            max-height: 80vh;
            border-radius: 10px;
        }
        
        .close-modal {
            position: absolute;
            top: 20px;
            right: 20px;
            color: white;
            font-size: 2rem;
            cursor: pointer;
        }
        
        .instructions {
            background: #f0f4ff;
            border-radius: 10px;
            padding: 15px;
            margin-top: 20px;
            font-size: 0.9rem;
        }
        
        .instructions h3 {
            margin-bottom: 10px;
            color: #4a6fc7;
        }
        
        .instructions ol {
            padding-left: 20px;
        }
        
        .instructions li {
            margin-bottom: 8px;
        }
        
        @media (max-width: 768px) {
            .main-content {
                flex-direction: column;
            }
            
            .left-panel, .right-panel {
                width: 100%;
            }
            
            h1 {
                font-size: 1.8rem;
            }
        }
        
        /* Drag and drop styling */
        .drag-over {
            background: #d1e0ff;
            border-color: #3b5bb0;
        }
        
        .dragging {
            opacity: 0.5;
        }
        
        /* Download modal */
        .download-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1001;
            justify-content: center;
            align-items: center;
        }
        
        .download-content {
            background: white;
            padding: 30px;
            border-radius: 15px;
            text-align: center;
            max-width: 500px;
            width: 90%;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }
        
        .download-icon {
            font-size: 4rem;
            color: #4a6fc7;
            margin-bottom: 20px;
        }
        
        .progress-bar {
            height: 10px;
            background: #f0f0f0;
            border-radius: 5px;
            margin: 20px 0;
            overflow: hidden;
        }
        
        .progress {
            height: 100%;
            background: linear-gradient(90deg, #4a6fc7, #6a11cb);
            width: 0%;
            transition: width 0.5s;
        }
        
        .sort-options {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 15px 0;
            justify-content: center;
        }
        
        .sort-btn {
            background: #6a11cb;
        }
        
        /* Notification toast */
        .toast {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 25px;
            border-radius: 8px;
            color: white;
            font-weight: 600;
            z-index: 2000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            display: flex;
            align-items: center;
            transform: translateX(100%);
            opacity: 0;
            transition: transform 0.3s ease-out, opacity 0.3s ease-out;
        }
        
        .toast.show {
            transform: translateX(0);
            opacity: 1;
        }
        
        .toast.success {
            background: #4caf50;
        }
        
        .toast.error {
            background: #f44336;
        }
        
        .toast.info {
            background: #2196f3;
        }
        
        .toast i {
            margin-right: 10px;
            font-size: 1.2rem;
        }