_material.less

/* SHADOWS */

@shadow-key-umbra-opacity: 0.2;
@shadow-key-penumbra-opacity: 0.14;
@shadow-ambient-shadow-opacity: 0.12;

// Focus shadow mixin.
.focus-shadow() {
  box-shadow: 0 0 8px rgba(0,0,0,.18),0 8px 16px rgba(0,0,0,.36);
}

.shadow-2dp() {
  box-shadow: 0 2px 2px 0 rgba(0, 0, 0, @shadow-key-penumbra-opacity),
              0 3px 1px -2px rgba(0, 0, 0, @shadow-key-umbra-opacity),
              0 1px 5px 0 rgba(0, 0, 0, @shadow-ambient-shadow-opacity);
}
.shadow-3dp() {
  box-shadow: 0 3px 4px 0 rgba(0, 0, 0, @shadow-key-penumbra-opacity),
              0 3px 3px -2px rgba(0, 0, 0, @shadow-key-umbra-opacity),
              0 1px 8px 0 rgba(0, 0, 0, @shadow-ambient-shadow-opacity);
}
.shadow-4dp() {
  box-shadow: 0 4px 5px 0 rgba(0, 0, 0, @shadow-key-penumbra-opacity),
              0 1px 10px 0 rgba(0, 0, 0, @shadow-ambient-shadow-opacity),
              0 2px 4px -1px rgba(0, 0, 0, @shadow-key-umbra-opacity);
}
.shadow-6dp() {
  box-shadow: 0 6px 10px 0 rgba(0, 0, 0, @shadow-key-penumbra-opacity),
              0 1px 18px 0 rgba(0, 0, 0, @shadow-ambient-shadow-opacity),
              0 3px 5px -1px rgba(0, 0, 0, @shadow-key-umbra-opacity);
}
.shadow-8dp() {
  box-shadow: 0 8px 10px 1px rgba(0, 0, 0, @shadow-key-penumbra-opacity),
              0 3px 14px 2px rgba(0, 0, 0, @shadow-ambient-shadow-opacity),
              0 5px 5px -3px rgba(0, 0, 0, @shadow-key-umbra-opacity);
}

.shadow-16dp() {
  box-shadow: 0 16px 24px 2px rgba(0, 0, 0, @shadow-key-penumbra-opacity),
              0  6px 30px 5px rgba(0, 0, 0, @shadow-ambient-shadow-opacity),
              0  8px 10px -5px rgba(0, 0, 0, @shadow-key-umbra-opacity);
}