body {
  background-image: url(../images/background.jpg);
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  background-color: #464646;
}
.header {
  margin-left: auto;
  margin-right: auto;
  margin-bottom: auto;
  padding-bottom: 20%;
}
.logo {
  margin-left: auto;
  float: left;
}
img.logo {
  height: 100%;
  max-height: 200px;
  width:100%;
  max-width: 350px;
}
.github {
  margin-right: auto;
  float: right;
}
img.github {
  height: 100%;
  max-height: 150px;
  width:100%;
  max-width: 400px;
 }
 .select {
  margin-left: auto;
  margin-right: auto;
  margin-bottom: auto;
}
 .sd2vita {
	text-align:center;
    margin-top: 2%;
}