header {
  width: 100%;
  background-image: linear-gradient(45deg, #0378a6, #57b56b);
  padding: 2vh 0;
  text-align: center;
}
header > img {
  width: 50%;
}
section {
  text-align: center;
}
section#start div#or {
  position: absolute;
  width: 40px;
  left: calc(50% - 20px);
  margin-top: -240px;
  background: #fff;
  z-index: 1;
}
section#start div#github {
  border-right: none;
  border-bottom: 1px dashed #444;
  padding-right: 0;
  padding-bottom: 40px;
}
section#start div#package {
  padding-left: 10px;
  padding-top: 40px;
}