Dimentional

The engine supports following length units:

Absolute Lengths

Unit	Description
px	pixels, either dip unit or ppx unit - depends on engine configuration. By default 1px === 1dip
in	inches - 1 inch is equal to 2.54 centimeters
cm	centimeters
mm	millimeters
pt	points - the points used by CSS 2.1 are equal to 1/72nd of an inch
pc	picas - 1 pica is equal to 12 points
dip	device independent pixels - logical units. 1dip = 1/96 of inch therefore on 96DPI display this will be one pixel. On high-dpi screens it will be resolved to larger number of physical pixels. For example: 2dip will take 3px on 120DPI screen. On printer 'dip' and 'px' units are equivalent.
ppx	physical pixel. On screen 1ppx is exactly one device pixel. On printer 1ppx is equal to 1/96 of inch.

Unit	Description
em	the font-size of the relevant font;
rem	the font-size of the root font;
ex	the x-height of the relevant font;
ch	width of `0` character in the relevant font;
%	percent - usually equals to precentage value of correspondent metric of parent element. But not always, see CSS specification.
vw	1/100th of view (window) width;
vh	1/100th of view (window) height;
vmin	1/100th of view's smallest side;
vmax	1/100th of view's largest view(window) size.

Unit	Description
width(X%)	percentage of `width` property value. If width is undefined it is treated as auto
height(Y%)	percentage of `height` property value. If height is undefined it is treated as auto

p { 
  height: 1.6em;
  line-height: height(100%);
}

Unit	Description
N*	flex unit, reflects weight in distribution of free space
*	flex unit, shortcut of `1*`

The calc() function is supported, but flex units cannot be used inside the calc.