👉 The subsection fluid, often abbreviated as SF, is a type of CSS property used to make elements responsive by allowing their width to adjust based on the viewport size. It works in conjunction with percentage values, enabling designers to create flexible layouts that adapt seamlessly across different devices and screen resolutions. By setting the width property to "fluid" and specifying a percentage value (e.g., 50%), elements will scale proportionally, ensuring content remains readable and visually appealing on both large desktop monitors and small mobile devices. This property is particularly useful in responsive web design, enhancing user experience by maintaining layout integrity and functionality across diverse viewing environments.