#splash {
  background-image:url("https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTL1qw__fSMU2xZjpO3LLv6BQwRgSDP4kgzF0PN8jxseXdVQnAtpw");
  background-size:cover;
  background-position:center;
  height:100vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  text-align:center;
  padding:0;
  box-sizing:border-box;
}

#buttonsInlineFlex {
  box-sizing:border-box;
}