The proliferation of diverse digital gadgets has transformed the panorama of internet surfing, necessitating a paradigm shift in internet design strategies. This research paper delves into the realm of responsive net layout, focusing on the symbiotic courting among HTML and CSS in creating adaptable and person-friendly interfaces throughout numerous screen sizes and gadgets. By investigating the ideas, strategies, and excellent practices associated with responsive design, this study targets to elucidate the evolving function of HTML and CSS in addressing the demanding situations posed by the dynamic and ever-expanding array of net-enabled gadgets.