12. The computer system in accordance with claim 1 , wherein the computer-executable instructions are further structured such that, when executed by the one or more processors, the computer system is further configured to perform the following: providing interactivity with the displayed style rules that include at least one of the authored style rules of the authored style rule set along with at least one of the derived style rules of the derived style rule set.
12. The computer system in accordance with claim 1 , wherein the computer-executable instructions are further structured such that, when executed by the one or more processors, the computer system is further configured to perform the following: providing interactivity with the displayed style rules that include at least one of the authored style rules of the authored style rule set along with at least one of the derived style rules of the derived style rule set. 18. The computer system in accordance with claim 12 , wherein one of the properties of a displayed derived style rule is bound with one of the properties of a displayed authored style rule, and where the act of providing interactivity comprises: receiving user input, the user input selecting and editing the property of the displayed authored style rule to assign a value to the property of the displayed authored style rule; and as a result, causing a value of the corresponding bound property of the displayed derived style rule to be assigned the same value of the property of the displayed authored style rule or a value that is derived from the value of the property of the displayed authored style rule.