I would like to make some compound
You would use
height: calc(100% - 10px);
The calc() function allows mathematical expressions with addition (‘+’), subtraction (‘-’), multiplication (‘*’), and division (‘/’) to be used as component values. The ‘calc()’ expression represents the result of the mathematical calculation it contains, using standard operator precedence rules. It can be used wherever , , , , , or values are allowed. Components of a ‘calc()’ expression can be literal values, ‘attr()’ or ‘calc()’ expressions, or values that resolve to one of the preceding types.