.shadow-z-1() {
  box-shadow:
    0 1px 6px 0 rgba(0, 0, 0, 0.12),
    0 1px  6px 0 rgba(0, 0, 0, 0.12);
}

.shadow-z-1-hover() {
  box-shadow:
    0 5px 11px 0 rgba(0, 0, 0, 0.18),
    0 4px 15px 0 rgba(0, 0, 0, 0.15);
}

.shadow-z-2() {
  box-shadow:
    0 8px 17px 0 rgba(0, 0, 0, 0.2),
    0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

.shadow-z-3() {
  box-shadow:
    0 12px 15px 0 rgba(0, 0, 0, 0.24),
    0 17px 50px 0 rgba(0, 0, 0, 0.19);
}

.shadow-z-4() {
  box-shadow:
    0 16px 28px 0 rgba(0, 0, 0, 0.22),
    0 25px 55px 0 rgba(0, 0, 0, 0.21);
}

.shadow-z-5() {
  box-shadow:
    0 27px 24px 0 rgba(0, 0, 0, 0.2),
    0 40px 77px 0 rgba(0, 0, 0, 0.22);
}


/* Shadows (from mdl http://www.getmdl.io/) */

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

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

.shadow-24dp() {
  box-shadow: 0  9px 46px  8px rgba(0, 0, 0, @mdb-shadow-key-penumbra-opacity),
  0 11px 15px -7px rgba(0, 0, 0, @mdb-shadow-ambient-shadow-opacity),
  0 24px 38px  3px rgba(0, 0, 0, @mdb-shadow-key-umbra-opacity);
}