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              <div class="target">target</div>
            
          
!
            
              //max-widthを用いてレスポンシブを実装する場合は、
//以下のように上から下へ、
//ブラウザサイズの広い時の設定から、狭い設定へと並べる

//max-width: 1200px の場合
//max-width: 600px の場合
//max-width: 300px の場合

//なぜならmax-width: xはブラウザ幅が「xまでは」
//有効という意味であって、かつcssは下にある方が上書きされるので
//狭い幅の時の設定が下の方にこないと、上書きされてしまう

$breakPoint1: 1200px
$breakPoint2: 600px
$breakPoint3: 300px

@mixin maxScreen($breakPoint)
	@media screen and (max-width: $breakPoint)
		@content
		//ここにdisplay: none が入る

.target
	background-color: red

	@include maxScreen($breakPoint1)
		background-color: green
		//このインデントの部分が@contentに相当する
	
	@include maxScreen($breakPoint2)
		background-color: blue
		//このインデントの部分が@contentに相当する
	
	@include maxScreen($breakPoint3)
		display: none
		//このインデントの部分が@contentに相当する
            
          
!
999px
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