Always use proper CSS comment syntax (`/* */`) instead of inline comments (`//`) for better cross-browser compatibility and code consistency. Additionally, rely on autoprefixer configuration for vendor prefixes rather than manually adding them, which reduces code duplication and maintenance overhead. Example of proper CSS commenting: ```css /* Good: Proper CSS comment syntax */ right: 10px; /* Allows clicking on the scrollbar */ /* Avoid: Inline comment syntax */ right: 10px; // Allows clicking on the scrollbar ``` For vendor prefixes, configure autoprefixer at the project level instead of manually adding prefixes: ```css /* Good: Let autoprefixer handle this */ user-select: none; /* Avoid: Manual vendor prefixes when autoprefixer is available */ -webkit-user-select: none; -khtml-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; ``` This approach ensures consistent formatting, reduces maintenance burden, and leverages build tools effectively for better code organization.