Shadow

$shadow_1: 0px 2px 4px 0px rgba(34, 34, 34, 0.12), 0px 0px 1px 0px rgba(0, 0, 0, 0.40); 
$shadow_2: 0px 2px 6px 2px rgba(0, 0, 0, 0.15), 0px 0px 1px 0px rgba(0, 0, 0, 0.50);
$shadow_3: 0px 3px 6px 3px rgba(0, 0, 0, 0.15), 0px 0px 1px 0px rgba(0, 0, 0, 0.40); 
$shadow_4: 0px 5px 10px 4px rgba(0, 0, 0, 0.15), 0px 0px 1px 0px rgba(0, 0, 0, 0.30); 
$shadow_5: 0px 8px 16px 5px rgba(0, 0, 0, 0.15), 0px 0px 1px 0px rgba(0, 0, 0, 0.30);

$shadow_focus: 0px 0px 0px 4px rgba(198, 208, 238, 0.50), 0px 2px 4px 0px rgba(34, 34, 34, 0.12), 0px 0px 1px 0px rgba(0, 0, 0, 0.50);
$shadow_validation: 0px 0px 0px 4px rgba(242, 209, 209, 0.50), 0px 2px 4px 0px rgba(34, 34, 34, 0.12), 0px 0px 1px 0px rgba(0, 0, 0, 0.50);

Вызов

.element {
  box-shadow: $shadow_1
}