<data>:1:1-6: error: GTK_CSS_PARSER_ERROR_UNKNOWN_VALUE
<data>:3:3-8: error: GTK_CSS_PARSER_ERROR_UNKNOWN_VALUE
<data>:5:5-10: error: GTK_CSS_PARSER_ERROR_UNKNOWN_VALUE
<data>:2:11-16: error: GTK_CSS_PARSER_ERROR_FAILED