body {
  font-family: Arial;
}

.wrapper {
  margin-right: auto; /* 1 */
  margin-left:  auto; /* 1 */

  padding-right: 10px; /* 3 */
  padding-left:  10px; /* 3 */
}

.img_bg {
  position:absolute;
  top: 0;
  left: 0;
  width:100%;
  height:auto;
  min-width: 90em;
  z-index:-10;
}

.appname {
  position:absolute;
  text-align:center;
  top: 400px;
  color: #fff;
  width: 100%;
  font-size: 4em;
  font-weight: bold;
  text-shadow: 3px 4px 2px #3994dd;
}

.content {
  position:absolute;
  text-align:center;
  top: 500px;
  width: 100%;
  color: #fff;
  font-size: 1.2em;
}

.footer {
  position:absolute;
  width: 100%;
  top: 650px;
  text-align: center;
  color: #fff;
  font-size: 0.8em;
}

.footer a {
  color: #fff;
}