Elad Shechter on Twitter: "Now you can unite #CSS 'vertical-padding' or 'horizontal-padding'. Works as well for the 'margin' and the 'border' properties. Supported in all updatable browsers. (while 'writing-mode' stays with its
超初心者のための Web作成特別講座
css - Why padding-left and height are not working the same as padding-bottom and width? - Stack Overflow
CSSのボックスモデルにおける古い方法とこれからの方法 -論理プロパティにおける考え方 | コリス
Set padding-left to 1cm and padding-right to .5cm in HTML and CSS