LESS basic drop shadow & inset shadow

gistfile1.txt

// Drop shadow
///////////////

// Parameters are: 
// 1. Horizontal offset
// 2. Vertical offset
// 3. Blur radius (optional)
// 4. Spread radius
// 5. Alpha transparency
// * Color set to BLACK

.drop_shadow (@x: 0, @y: 1px, @blur: 2px, @spread: 0, @alpha: 0.25) {
  -moz-box-shadow:  @x @y @blur @spread rgba(0, 0, 0, @alpha);
  -webkit-box-shadow: @x @y @blur @spread rgba(0, 0, 0, @alpha);
  box-shadow:   @x @y @blur @spread rgba(0, 0, 0, @alpha);
}

// Same as drop shadow but no spread
.inset_shadow (@x: 0, @y: 1px, @blur: 1px, @alpha: 0.1) {
  -moz-box-shadow: inset @x @y @blur rgba(0, 0, 0, @alpha);
  -webkit-box-shadow: inset @x @y @blur rgba(0, 0, 0, @alpha);
  box-shadow: inset @x @y @blur rgba(0, 0, 0, @alpha);
}