.masthead h1 {
  transform: rotate(-90deg) translate(0, -100%);
  transform-origin: right top;
  padding-bottom: 10px;
}

.masthead h1 {
  transform: rotate(-90deg) translate(0, -100%);
  transform-origin: right top;
  padding-bottom: 10px;
  overflow-x: visible;
  float: right;
}

Handle the overflow a bit nicer.
Handle the overflow a bit nicer.
