.header {
  padding: 30px 3vw;
  position: absolute;
  top: 0;
  width: 100%;
  z-index: 3;
}

.header.collapsed {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  flex-shrink: 0;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

body {
  line-height: 3;
  overflow-x: hidden;
}

.footer {
  position: static;
  line-height: 2;
}

html body #using {
  // left: auto!important;
  // right: 400px!important;
  // font-size: 50px!important;
}