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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

  h1 親の横幅に対して縦横比を固定したブロックを作ってみた
  p windowの幅に対してコンテンツが縦横比固定で縮尺する
           p 文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか文章とか
              @import "nib"

  margin 0 auto
  width 90%

  width 80%
    box-sizing border-box
    float left
    overflow hidden
    padding 10px
    width 50%
  border-params = solid 1px #ccc
  border-top border-params
  border-right border-params
    border-left border-params

    border-bottom border-params
    border-bottom none

    overflow hidden
    position relative
    width 100%

      content ''
      display block
      // http://www.w3.org/TR/CSS21/box.html
      // "The percentage is calculated with respect to the width of the generated box's containing block, even for 'padding-top' and 'padding-bottom'."
      // なのでpadding-topの値はコンテンツの"幅"基準で計算される
      padding-top 60%

    absolute top 0 left 0 bottom 0 right 0
    margin auto
    width 100%

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