body{
  background: #efefef;
  margin: auto;
  font-family: arial;

}
.header{
  margin: auto;
  margin-top: 30px;
  width: 860px;
  border: 1px solid black;
  background: #cccccc;
  padding: 20px;
  text-align: center;
}
h1{
  font-size: 30px;

}
.nav_bar{
  margin: auto;
  width: 860px;
  padding: 5px 20px 5px 20px;
  border: 1px solid black;
  background: black;
  color: #ffffff;
  text-align:center;
  font-size: 20px;
  font-weight: bold;
  word-spacing: 40px;
}
.nav_bar a{
  color: #ffffff;
  text-decoration: none;

}
.nav_bar a:hover{
  color: #ffffff;
  text-decoration: underline;
}
.main_container{
  margin: auto;
  width: 860px;
  padding: 20px;
  background: #ffffff;
  border: 1px solid black;
  min-height: 500px;
}
h2{
  font-size: 18px;
}
p{
  font-size: 14px;
}
.footer{
margin: auto;
width: 878px;
padding: 9px;
border: 3px solid black;
text-align: center;
background: grey;
font-weight: bold;
}