as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
give 3 tips on css grid usage.
user
1. start by defining your grid with a container and rows, and set a few simple rows and columns. 
2. use the grid auto-flow property to determine the number of rows and columns within a given container
3. use fractions for precise grid measurements and percentages for more out-of-the-box responsiveness.
assistant