Modern interior design refers to a design approach that aims to create contemporary, functional, and visually refined spaces for both residential and commercial environments. It is characterized by clean lines, simplicity, and the use of modern materials, colors, and innovative technologies. Principles and Features of Modern Interior Design Modern interior design is based on several core principles that define its unique style and functionality: It emphasizes simplicity and minimalism, focusing on clean geometric lines and avoiding unnecessary decorative elements. Spaces are designed to feel open, organized, and uncluttered, creating a sense of calm and balance. The use of modern materials such as glass, metal, concrete, and natural wood is also a key feature. These materials are combined in creative ways to achieve both durability and aesthetic appeal. Lighting plays an essential role in modern interiors, with a strong focus on natural light and smart lighting systems that enhance mood and functionality. Color schemes are typically neutral, including shades of white, gray, beige, and black, often complemented by subtle accent colors to add depth and personality. Technology integration and smart home systems are also becoming an important part of modern interior design, improving comfort, efficiency, and user experience. Conclusion Modern interior design is a comprehensive approach that combines aesthetics, functionality, and innovation. It creates spaces that are not only visually appealing but also practical, comfortable, and aligned with contemporary lifestyles. If we summarize its essence, modern design is about balance—between simplicity and elegance, function and beauty, tradition and innovation [...]