body{
font-size:16px
}

#main{
    width: 90%
}

#mainContent {
    width: calc(100% - 320px);
}

.postBody h2 {
    background-color: #2175bc;
    color: #FFF;
   padding-left: 10px
}

.postBody h3 {
      background-color: rgb(166,166,10);
    color: #FFF;
   padding-left: 10px
}