body{background: #fff;color:#3c3b3b;margin: 0;}
.container{max-width: 600px;margin: auto;}
section.header{
    padding: 2rem 0;
}
section.header .logo{
   max-width:120px;
}
section.main_body{}
.row{display:table;width:100%;}
.row:after, .row:before{
    content:'';
    display:table;
    clear:both;}