@xs-min: 360px;
@sm-min: 480px;
@md-min: 768px;
@lg-min: 801px;
@xl-min: 1200px;

@xs-max: (@sm-min - 1);
@sm-max: (@md-min - 1);
@md-max: (@lg-min - 1);
@lg-max: (@xl-min - 1);

@mobile-sm:        ~"only screen and (max-width: @{xs-min})";
@mobile-sm-strict: ~"only screen and (min-width: @{xs-min}) and (max-width: @{xs-max})";

@mobile:          ~"only screen and (max-width: @{sm-min})";
@mobile-strict:   ~"only screen and (min-width: @{sm-min}) and (max-width: @{sm-max})";

@tablet:         ~"only screen and (max-width: @{md-min})";
@tablet-strict:  ~"only screen and (min-width: @{md-min}) and (max-width: @{md-max})";

@desktop:        ~"only screen and (max-width: @{lg-min})";
@desktop-strict: ~"only screen and (min-width: @{lg-min}) and (max-width: @{lg-max})";

@desktop-xl:   ~"only screen and (max-width: @{xl-min})";