@import url(//fonts.googleapis.com/css?family=Satisfy)

=satisfy($fw: null, $ls: null, $fs: null, $tx-rendering: true)
  // $fw: フォントの太さ, $ls: 字間, $fs: フォントスタイル
  font-family: 'Satisfy', cursive
  @if $fw
    font-weight: $fw
  @if $ls
    letter-spacing: $ls
  @if (not $fs == null)
    font-style: italic
  @if $tx-rendering
    text-rendering: optimizelegibility