반응형 웹 만들때 필수 속성

//HTML
<meta name = "viewport" content="width=device-width, initial-scale=1.0">



//CSS
    @media(max-width:767px){
      body{
        background-color: purple;
      }
      #wrapper{
        width: 100%;
        font-size: 2em;
      }
      nav li{
        width: 100%;
      }
    }