:root {
            --primary-color: #4CAF50;
            --secondary-color: #2E7D32;
            --text-color: #333;
            --light-bg: #f5f5f5;
            --border-color: #ddd;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            text-align: center;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
        }
        
        h1 {
            color: var(--primary-color);
            margin-bottom: 10px;
        }
        
        .container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .card {
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            padding: 20px;
            margin-bottom: 20px;
            width: 100%;
            max-width: 600px;
        }
        
        .card-title {
            color: var(--secondary-color);
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        
        .form-group {
            margin-bottom: 15px;
        }
        
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        
        input, select, textarea {
            width: 100%;
            padding: 10px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-size: 16px;
        }
        
        textarea {
            min-height: 100px;
            font-family: monospace;
        }
        
        button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 4px;
            padding: 10px 20px;
            font-size: 16px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        button:hover {
            background-color: var(--secondary-color);
        }
        
        button:disabled {
            background-color: #ccc;
            cursor: not-allowed;
        }
        
        .progress-container {
            width: 100%;
            height: 20px;
            background-color: #f1f1f1;
            border-radius: 10px;
            margin-bottom: 15px;
            overflow: hidden;
        }
        
        .progress-bar {
            height: 100%;
            background-color: var(--primary-color);
            width: 0%;
            transition: width 0.3s;
        }
        
        .status {
            margin-bottom: 15px;
            font-style: italic;
        }
        
        .error {
            color: #d32f2f;
            margin-bottom: 15px;
        }
        
        .file-input-container {
            position: relative;
            overflow: hidden;
            display: inline-block;
            width: 100%;
        }
        
        .file-input-container input[type=file] {
            position: absolute;
            left: 0;
            top: 0;
            opacity: 0;
            width: 100%;
            height: 100%;
            cursor: pointer;
        }
        
        .file-input-button {
            background-color: #f1f1f1;
            color: var(--text-color);
            padding: 10px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            text-align: center;
            width: 100%;
        }
        
        .file-name {
            margin-top: 5px;
            font-size: 14px;
            color: #666;
        }
        
        .note {
            background-color: #e8f5e9;
            border-left: 4px solid var(--primary-color);
            padding: 10px 15px;
            margin-bottom: 20px;
            font-size: 14px;
        }
        
        .warning {
            background-color: #fff8e1;
            border-left: 4px solid #ffc107;
            padding: 10px 15px;
            margin-bottom: 20px;
        }
        
        .file-list {
            margin-top: 15px;
            max-height: 200px;
            overflow-y: auto;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 10px;
        }
        
        .file-list-item {
            display: flex;
            justify-content: space-between;
            padding: 5px 0;
            border-bottom: 1px solid #eee;
        }
        
        .file-list-item:last-child {
            border-bottom: none;
        }
        
        .file-list-item-path {
            flex-grow: 1;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            margin-right: 10px;
        }
        
        .file-list-item-size {
            color: #666;
            font-size: 0.9em;
        }
        
        @media (max-width: 768px) {
            .card {
                width: 100%;
            }
        }