.file-input-container {
            margin: 20px;
            padding: 20px;
            border: 2px dashed #ccc;
            border-radius: 8px;
            text-align: center;
        }
        .file-info {
            margin-top: 15px;
            padding: 15px;
            border: 1px solid #4CAF50;
            border-radius: 4px;
            background-color: #f8fff8;
            color: #2E7D32;
        }
        .hidden {
            display: none;
        }
        #fileButton {
            background-color: #4CAF50;
            color: white;
            padding: 12px 24px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
        }
        #fileButton:hover {
            background-color: #45a049;
        }
        .success-message {
            color: #4CAF50;
            font-weight: bold;
        }
        .error-message {
            color: #f44336;
            font-weight: bold;
        }
        .loading {
            opacity: 0.7;
            cursor: not-allowed;
        }