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CSRF: Cross-Site Request Forgery (CSRF) is a web security vulnerability that tricks an authenticated user into performing unintended actions on a web application. Unlike attacks that steal data directly, CSRF abuses the trust a website places in a user's browser. If a user is already logged in, an attacker may be able to make requests on their behalf without their knowledge.

Accessibility: Accessibility is the practice of designing and developing websites, applications, and digital products so that they can be used by as many people as possible, including individuals with disabilities. Good accessibility ensures that users with visual, auditory, motor, cognitive, or other impairments can effectively perceive, understand, navigate, and interact with digital content. Accessibility is not only about compliance; it is about creating inclusive experiences that benefit everyone.

Viewports: A viewport is the visible area of a webpage within a browser or application window. It determines how content is displayed and is one of the most important concepts in responsive web design. Although screen size and screen resolution describe the physical characteristics of a device, the viewport represents the area available for rendering content. Understanding the difference between viewports and screen resolutions is essential for building responsive applications that work across various devices.

Tech for Devices: Modern applications run on a wide variety of devices, including smartphones, tablets, laptops, desktops, smart TVs, smartwatches, and even automotive displays. Despite differences in screen sizes, resolutions, and interaction methods, most web experiences are built upon the same core technologies: HTML, CSS, and JavaScript. These technologies, combined with browsers, frameworks, APIs, and responsive design principles, allow developers to create applications that work consistently across different devices and form factors.