.row{
    margin: 20px;
  }
  
.col {
    float: left;
    width: 33%;
    padding: 0 10px;
 }

 .sticky {
  position: fixed;
  z-index:1;
  top: 0;
  width: 100%;
}

.sticky + .contenido {
  padding-top: 102px;
}