* {
            font-family: 'Inter', sans-serif;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #eef2f7 100%);
            min-height: 100vh;
        }

        .drop-zone {
            border: 3px dashed #cbd5e1;
            border-radius: 20px;
            padding: 2.5rem;
            text-align: center;
            background: white;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .drop-zone::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: 0;
        }

        .drop-zone:hover {
            border-color: #3b82f6;
            transform: translateY(-2px);
            box-shadow: 0 20px 25px -5px rgba(59, 130, 246, 0.2);
        }

        .drop-zone.dragover {
            border-color: #3b82f6;
            background: #eff6ff;
            transform: scale(1.02);
        }

        .drop-zone.dragover::before {
            opacity: 0.05;
        }

        .drop-zone * {
            position: relative;
            z-index: 1;
        }

        .file-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            padding: 1rem 0;
            max-height: 500px;
            overflow-y: auto;
            scrollbar-width: thin;
            scrollbar-color: #3b82f6 #e2e8f0;
        }

        .file-list::-webkit-scrollbar {
            width: 6px;
        }

        .file-list::-webkit-scrollbar-track {
            background: #e2e8f0;
            border-radius: 10px;
        }

        .file-list::-webkit-scrollbar-thumb {
            background: #3b82f6;
            border-radius: 10px;
        }

        .file-item {
            background: white;
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            padding: 1rem;
            text-align: center;
            cursor: move;
            transition: all 0.2s ease;
            position: relative;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        }

        .file-item:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            border-color: #3b82f6;
        }

        .file-item.ui-sortable-helper {
            transform: rotate(2deg) scale(1.05);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
            border-color: #3b82f6;
            background: #f8fafc;
        }

        .file-item.ui-sortable-placeholder {
            visibility: visible !important;
            background: #f1f5f9;
            border: 2px dashed #94a3b8;
        }

        .preview-container {
            height: 150px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 10px;
            background: #f8fafc;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid #e2e8f0;
        }

        canvas {
            max-width: 100%;
            max-height: 100%;
            border-radius: 6px;
        }

        .remove-btn {
            position: absolute;
            top: 8px;
            right: 8px;
            background: #ef4444;
            color: white;
            border: none;
            border-radius: 50%;
            width: 24px;
            height: 24px;
            font-size: 14px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: all 0.2s ease;
            box-shadow: 0 2px 5px rgba(239, 68, 68, 0.3);
        }

        .file-item:hover .remove-btn {
            opacity: 1;
        }

        .remove-btn:hover {
            background: #dc2626;
            transform: scale(1.1);
        }

        .progress-bar {
            height: 4px;
            background: linear-gradient(90deg, #3b82f6, #8b5cf6);
            transition: width 0.3s ease;
        }

        .toast-message {
            animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }

        @keyframes slideIn {
            from {
                transform: translateX(100%);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        @keyframes fadeOut {
            from {
                opacity: 1;
            }
            to {
                opacity: 0;
            }
        }

        .spinner {
            border: 3px solid #f3f3f3;
            border-top: 3px solid #3b82f6;
            border-radius: 50%;
            width: 24px;
            height: 24px;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }

        @media (max-width: 768px) {
            .drop-zone {
                padding: 1.5rem;
            }
            .file-list {
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            }
            .preview-container {
                height: 120px;
            }
        }

        .file-stats {
            background: linear-gradient(135deg, #f8fafc, #f1f5f9);
            border: 1px solid #e2e8f0;
        }