html{
    background-image: url("binblow.jpg");
    background-size:100%;
}

article{
  display: block;
  margin-left: auto;
  margin-right:auto;
  width:70%;
}
#app{
  align-items: center;
text-align: center;
  background-color:#053050;
  margin-top: 50%;
  padding: 5% 10% 5% 10%;
}

p{
  color:#FFF
}
h1{
  color:#FFF
}
img{
  width: 50%;
}

nav li{
display: inline-block;
padding-left: 10px;
padding-right: 10px;
}
nav li a {

  padding: 2px;
  text-decoration:none;
  background-color: #053050;
  font-family: 'Nanum', sans-serif;
box-shadow: 5px 5px 0px #FFF;

}
nav li a:link{
    color:#fff;
}
nav li a:visited{
    box-shadow: 5px 5px 0px #000;
    color:#fff;
  }
nav li a:hover{
    box-shadow: 0px 0px 0px #000;
    color:#fff;
}