$gradient: linear-gradient(to right bottom, #000 0%, lighten(#000, 10%) 100%) !default;
$shadow: 0px 5px 10px rgba(0, 0, 0, 0.1) !default;
$transition: all 0.2s ease-out !default;
$outline-active: 3px solid rgba(#529ef6, 0.2) !default;