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Everything you should know about CSS3 - CSS3.info
The CSS Working Group has reached an impasse on the issue of percentage margins (and padding) in ... The CSS Working Group has reached an impasse on the issue of percentage margins (and padding) in flex and grid layout, and needs your input to help decide it. Option 1: Flex and grid items resolve percentages in margin-top and margin-bottom against the height of the element’s containing block. Option 2: Flex and grid items resolve percentages in margin-top and margin-bottom against the width of th
2012/05/24 リンク