div#left_sidebar {
  margin-left: 15%;
  margin-right: 15%
}

div#top_banner {
  margin-left: 15%;
  margin-right: 15%
}


div#Amex_logo_right {
  margin-left: 15%;
  margin-right: 15%
}

div#center {
  margin-left: 15%;
  margin-right: 15%
}