body {
  color: #555;
  height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
}
#header{
  background-color: #1abc9c;
  height: 150px;
  line-height: 150px;
}
#header a {
  color: white;
  text-decoration: none;

  text-transform: uppercase;
  letter-spacing: 0.1em;
}
#header a:hover{
  color: #222;
}
#header-title{
  display: block;
  float: left;
  font-size: 20px;
  font-weight: bold;
}
#header-nav{
  display: block;
  float: right;
  margin-top: 0;
}
#header-nav li{
  display: inline;
  padding-left: 20px;
}
#footer{
  margin-top: auto;
  background-color: #2f2f2f;
  padding: 50px 0;
}
#footer h4{
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
#footer p{
  color: white;
}
a{
  color: #1abc9c;
  text-decoration: none;
}
a:hover{
  color: #F6A623;
}
.container{
  max-width: 1000px;
  margin: 0 auto;
}
.column{
  min-width: 300px;
  display: inline-block;
  vertical-align: top;
}
.post{
  height: 100%;
  max-width: 800px;
  margin: auto;
  padding: 60px 0;
}
.post-author img{
  height: 150px;
  width: 150px;
  border-radius: 75px;
}
.about{
  text-align: center;
}