Less only makes a few convenient additions to the CSS language, which is one of the reasons it can be learned so quickly. For detailed documentation on Less language features, see Features; For a list of Less Built-in functions, see Functions; For detailed usage instructions, see Using Less.js; For third-party tools for Less, see Tools

Less vs. Fewer: Usage Guide constituting a more limited number or amount; of lower rank, degree, or importance; of reduced size, extent, or degree… See the full definition