css question

http://dev.921thefrog.com/events/station-events/

I have tried to add css but it isn’t working. I need the text the right of the image. excerpt and date and time. This did not work..

.ecs-excerpt {float: right;margin: 0 0 10px 10px;}

https://ww.wp.xz.cn/plugins/the-events-calendar-shortcode/