body { background-color:lightBlue; }
        .container { margin: 150px auto; max-width: 960px; }.lead { font-size: 1.5rem; font-weight: 300; }

            .share_twitter {
  overflow: hidden;
  position: fixed;
  bottom: 15px;
  right: 15px;
}
            .share_wav {
  overflow: hidden;
  position: fixed;
  bottom: 39px;
  right: 12px;
}
            .contact {
  overflow: hidden;
  position: fixed;
  bottom: 15px;
  left: 12px;
}
            .download {
  overflow: hidden;
  position: fixed;
  bottom: 39px;
  left: 12px;
}