sample.less

// Importing
@import "_base.less"

// Variables
@nice-blue: #5B83AD;
@light-blue: @nice-blue + #111;
#header { color: @light-blue; }

// Mixins
.bordered(@color: #f04) {
  border-top: dotted 1px @color;
  border-bottom: solid 2px @color;
}
#menu a {
  .bordered(#f00); color:#111;
}

// Nested
#header {
  h1 { font-size: 12px; }
  .logo {
    width: 300px;
    :hover { text-decoration: none }
  }
}

// Operations
@base: 5%;
@filler: @base * 2;
@other: @base + @filler;
td { 
  background-color: @base-color + #111;
  height: 100% / 2 + @filler;
}

/*
 Accessors
*/
.comment {
  width: #defaults[@width];
  color: .article['color']; 
}