This is material design

Material design, introduced at Google I/O 2014 by designer Nicholas Jitkoff, represents a unified design approach intended to create consistent, intuitive user experiences across a variety of devices, including mobile, desktop, wearables, TVs, and automobiles. This design framework emphasizes tactile surfaces, bold graphics, and fluid motion, aiming to deliver aesthetic and functional clarity by using surface and shadow to denote touchable elements and movement. With its debut in the L-Release of Android, material design offers new tools such as a Material theme for apps, customizable color palettes, and enhanced UI features like dynamic shadow casting. Additionally, the design principles are being extended to the web via Polymer, a UI toolkit that allows developers to incorporate material design's characteristics into web applications, emphasizing tangibility and visual dynamics. The guidelines for material design, which aim to facilitate the creation of seamless applications and services across diverse platforms, are available on google.com/design.