Canadian log book question

Im a Canadian driver. Let me start by saying I'm aware that I can drive up to 13 hours in a 14 hour period and that I then need to take 10 hours off/sleeper. My question is if I have a short day how will my hours work out. Let me give an example:

I start my day at 12 noon and I drive for 3 hours and I'm on duty for 1 hour for a total of 4 hours on duty including driving. Thats all dispatch has for me today so i take 10 + hours in the bunk and some off duty time because I don't have to come on duty again until 8 am the next morning to reload.

My question is how many hours do I have available to drive when I start at 8am. Do I have my 14 hour day available or do I only have 10 hours available because I already used 4 hours the previous day.

 

So I don't have to keep a 24 hour day as long as I take 10 hours off, my 14 hours on duty is reset (without going over 70 hours in 7 days of course). Is that right? It confuses me because all the rules talk about a full day like 14 hours on duty and 10 hours off/sleeper to total a 24 hour day but they never talk about a short day lol.