Hardware is the answer.
Software is not really tangible
Operating system is software
Input is not truly 'physical'
Answer:
style inheritance
Explanation:
What happens when a property on an element has no value supplied is governed by style inheritance. A property should inherit its value from its parent element, according to this specification.
Answer:
I had a similar problem. I would suggest consulting someone professionally because thats what I had to do. I really dont know why it does that