.display-grande{
  display:inherit !important;
}

h1, h2{
  text-align: center;
}

header, footer, #wrapper{
  margin-left: auto;
  margin-right: auto;
  clear: both;
  width: 100%;
  max-width: 1500px;
}



#main-section{
  margin-left: 0 auto;
  width: 100%;
  max-width: 1200px;
}

.columna {

  flex: 1 1 30%;
  max-width: 30%;
  min-width: 280px;
}