.et_pb_blog_grid .et_pb_post.category-past-event {
border: 2px solid grey!important;
}
.et_pb_blog_grid .et_pb_post.category-upcoming-event {
border: 2px solid #ff9900!important;
} .et_pb_blog_grid .et_pb_post.category-vergangene-events {
border: 2px solid grey!important;
}
.et_pb_blog_grid .et_pb_post.category-kommendes-event {
border: 2px solid #ff9900!important;
}