Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a responsive user interface. One of the methods includes receiving a page for a user device, the page including a panels. The method includes receiving a layout for the page, the layout defining a visual relationship between the panels. The method includes generating, by a computer system, a slide including a subset of panels to display on the user device, the subset of panels selected based on characteristics of the user device and the layout. The method includes sending the slide to the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a responsive user interface. One of the methods includes receiving a page, the page including panels, each panel having an equivalent predetermined size. The method includes receiving a layout for the page, the layout defining a predefined hierarchy of panel groups that defines a visual relationship between the panel groups. The method includes selecting panels to include in a slide based on characteristics of the user device and the panel groups. The method includes determining a scaled size for each panel in the selected panels based on a relative weighting of the panel groups. The method includes resizing a panel in the set of panels based on the scaled size. The method includes generating the slide using the set of panels including the resized panel. The method includes sending the slide to the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a dynamic api, includes receiving a first message in a first format from a client, the first format being specified for the client, the first message including information sufficient to cause a target service to execute an operation. The method includes identifying, using the API message, the target service. The method includes determining based of the target, a second format. The method includes generating a second message in the second format prescribed by the target service using the first message, the second message including information sufficient to cause the target service to execute the operation. The method also includes sending the second message to the target service over the network connector.