Canonical orderthe unique non-ambiguous order defined by the formal grammar
Syntax
Formal syntax: <length> | <percentage> | auto
margin-top: 10px; /* An absolute length */
margin-top: 1em; /* A length relative to the text size */
margin-top: 5%; /* A margin relative to the nearest block container's height */
margin-top: auto;
margin-top: inherit;
Values
<length>
Specifies a fixed width. See <length> for possible values.
<percentage>
A <percentage> always relative to the width of the containing block.