Annoying window

For those who visit coloribus.com
when visiting the old posts viewing is not available "non-subscribers"
but enough to download a file of styles www.coloribus.com/@/fit/style.css and replace it two lines ... on then in sovem browser (eg in Opere) on the page, right-click, “settings for the site”, “view”, “my stylesheet” indicate the new changed .css file and the page that looked like this looks like this.

.col-bg {бла бла бла}
.col-login {бла бла бла}

.col-bg {visibility: hidden;}
.col-login {visibility: hidden;}