#aui {
    .shadow {
        // For use on cards and other things that sit flush on top of other layers.
        .z100() {
            box-shadow:
                0 1px 1px @ak-color-N40A,
                0 0 1px 0 @ak-color-N50A;
        }

        // For inline dialogs
        .z200() {
            box-shadow:
                0 4px 8px -2px @ak-color-N50A,
                0 0 1px @ak-color-N60A;
        }

        // For modal dialogs
        .z300() {
            box-shadow:
                0 8px 16px -4px @ak-color-N50A,
                0 0 1px @ak-color-N60A;
        }

        // For flags and notifications
        .z500() {
            box-shadow:
                0 20px 32px -8px @ak-color-N50A,
                0 0 1px @ak-color-N60A;
        }

        // Deprecated since AUI 7.3
        .inner(@inner: 0 1px 0 0 rgba(255, 255, 255, 0.1) inset) {
            box-shadow+: @inner;
        }

        // Deprecated since AUI 7.3
        .outer(@outer: 0 1px 1px 0 rgba(0, 0, 0, 0.2)) {
            box-shadow+: @outer;
        }

        // Deprecated since AUI 7.3
        .inner-and-outer(@inner: 0 1px 0 0 rgba(255, 255, 255, 0.1) inset, @outer: 0 1px 1px 0 rgba(0, 0, 0, 0.2)) {
            .inner(@inner);
            .outer(@outer);
        }
    }
}