User Interface

GUI/UI

or“Graphical User Interface”,is a visual part of the software or a website that allows the user to interact with the application. Every time when you are using an application you use it by clicking through GUI.

Responsive Design

is responsible for making the interface of the application display well on all possible devices like phones, PCs or tablets that we use to access it.

CSS

(Cascading Style Sheets) is a method of assigning formatting rules to an HTML page which allows the content and presentation of a website to be separated. This separation gives web developers the ability to instantly change the appearance of a specific HTML element, like position, colors, fonts, etc., throughout an entire website. Read more: Wikipedia

Material design

is Google’s conceptual design philosophy that outlines how apps should look and work. It breaks down everything from animation, style to layout and gives guidance on patterns, components and usability. Read more: Wikipedia

Bootstrap

is a free open-source front-end web framework for designing websites and web applications. It makes it very easy to create webpages by empowering designers to select from a large collection of pre-built elements, behaviors, and shortcuts. The aim is to unify design and allow both non-technical and technical designers to improve the quality of their design. Read more: Wikipedia