* {
  margin: 0;
  padding: 0;
}
#body {
  background-color: #E8F5E9;
}
#wrap {
  width: 1200px;
  margin: 0 auto;
}
#header {
  width: 100%;
  height: 100px;
  background-color: #C8E6C9;
}
#nav {
  width: 100%;
  height: 100px;
  background-color: #A5D6A7;
}
#main {
  width: 100%;
  overflow: hidden;
}
#aside {
  width: 30%;
  height: 780px;
  background-color: #81C784;
  float: left;
}
#section {
  width: 40%;
  height: 780px;
  background-color: #66BB6A;
  float: left;
}
#article {
  width: 30%;
  height: 780px;
  background-color: #4CAF50;
  float: left;
}
#footer {
  width: 100%;
  height: 100px;
  background-color: #43A047;
}
/* 미디어 쿼리 */
@media (max-width: 1300px){
  #wrap {
    width: 96%;
  }
}
@media (max-width: 768px){
  #wrap {
    width: 100%;
  }
  #aside {
    width: 30%;
    height: 630px;
  }
  #section {
    width: 70%;
    height: 630px;
  }
  #article {
    width: 100%;
    height: 150px;
  }
}
@media (max-width: 480px){
  #aside {
    width: 100%;
    height: 200px;
  }
  #section {
    width: 100%;
    height: 430px;
  }
}