/**
 * Shadow Presets
 * Concept from: https://github.com/angular/material/blob/master/src/core/style/variables.scss
 */
 $shadow-key-umbra-opacity: 0.2;
 $shadow-key-penumbra-opacity: 0.14;
 $shadow-ambient-shadow-opacity: 0.12;

 $shadow-1:
  0 1px 3px 0 rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 1px 1px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 2px 1px -1px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-2:
  0 1px 5px 0 rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 2px 2px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 3px 1px -2px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-3:
  0 1px 8px 0 rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 3px 4px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 3px 3px -2px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-4:
  0 2px 4px -1px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 4px 5px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 1px 10px 0 rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-5:
  0 3px 5px -1px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 5px 8px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 1px 14px 0 rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-6:
  0 3px 5px -1px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 6px 10px 0 rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 1px 18px 0 rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-7:
  0 4px 5px -2px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 7px 10px 1px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 2px 16px 1px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-8:
  0 5px 5px -3px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 8px 10px 1px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 3px 14px 2px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-9:
  0 5px 6px -3px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 9px 12px 1px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 3px 16px 2px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-10:
  0 6px 6px -3px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 10px 14px 1px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 4px 18px 3px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-11:
  0 6px 7px -4px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 11px 15px 1px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 4px 20px 3px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-12:
  0 7px 8px -4px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 12px 17px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 5px 22px 4px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-13:
  0 7px 8px -4px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 13px 19px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 5px 24px 4px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-14:
  0 7px 9px -4px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 14px 21px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 5px 26px 4px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-15:
  0 8px 9px -5px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 15px 22px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 6px 28px 5px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-16:
  0 8px 10px -5px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 16px 24px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 6px 30px 5px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-17:
  0 8px 11px -5px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 17px 26px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 6px 32px 5px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-18:
  0 9px 11px -5px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 18px 28px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 7px 34px 6px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-19:
  0 9px 12px -6px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 19px 29px 2px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 7px 36px 6px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-20:
  0 10px 13px -6px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 20px 31px 3px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 8px 38px 7px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-21:
  0 10px 13px -6px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 21px 33px 3px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 8px 40px 7px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-22:
  0 10px 14px -6px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 22px 35px 3px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 8px 42px 7px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-23:
  0 11px 14px -7px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 23px 36px 3px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 9px 44px 8px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);

 $shadow-24:
  0 11px 15px -7px rgba(0, 0, 0, $shadow-key-umbra-opacity),
  0 24px 38px 3px rgba(0, 0, 0, $shadow-key-penumbra-opacity),
  0 9px 46px 8px rgba(0, 0, 0, $shadow-ambient-shadow-opacity);


.shadow-1 { box-shadow: $shadow-1; }
.shadow-2 { box-shadow: $shadow-2; }
.shadow-3 { box-shadow: $shadow-3; }
.shadow-4 { box-shadow: $shadow-4; }
.shadow-5 { box-shadow: $shadow-5; }
.shadow-6 { box-shadow: $shadow-6; }
.shadow-7 { box-shadow: $shadow-7; }
.shadow-8 { box-shadow: $shadow-8; }
.shadow-9 { box-shadow: $shadow-9; }
.shadow-10 { box-shadow: $shadow-10; }
.shadow-11 { box-shadow: $shadow-11; }
.shadow-12 { box-shadow: $shadow-12; }
.shadow-13 { box-shadow: $shadow-13; }
.shadow-14 { box-shadow: $shadow-14; }
.shadow-15 { box-shadow: $shadow-15; }
.shadow-16 { box-shadow: $shadow-16; }
.shadow-17 { box-shadow: $shadow-17; }
.shadow-18 { box-shadow: $shadow-18; }
.shadow-19 { box-shadow: $shadow-19; }
.shadow-20 { box-shadow: $shadow-20; }
.shadow-21 { box-shadow: $shadow-21; }
.shadow-22 { box-shadow: $shadow-22; }
.shadow-23 { box-shadow: $shadow-23; }
.shadow-24 { box-shadow: $shadow-24; }

.shadow-fx {
  transition: all 0.3s cubic-bezier(.25,.8,.25,1);

  &:hover {
    box-shadow: $shadow-20;
  }
}