Libadwaita 1.0 is the successor to libhandy that complemented GTK3. Libadwaita 1.0 offers a reworked stylesheet now that the Adwaita style has become part of the library rather than within GTK. This new libadwaita style is designed to be more modern, supports runtime recoloring, a more proper dark variant contrast, style classes updates, API to support the new cross-desktop dark style preference, improved notifications, and much more.
Learn more about the many changes and improvements with Libadwaita 1.0 compared to the former libhandy via today's 1.0 announcement . Libadwaita is hosted via the GNOME GitLab .