.centered { position: fixed; top: 40%; left: 40%; margin-top: -50px;margin-left: -100px;}

.something-semantic {
   display: table;
   width: 100%;
}

.something-else-semantic {
   display: table-cell;
   text-align: center;
   vertical-align: middle;
}

.block {
  text-align: center;
}

.block:before {
  content: '';
  display: inline-block;
  height: 100%;
  vertical-align: middle;
  margin-right: -0.25em;
}

 .sample1	{
 	display: inline-block;
  vertical-align: middle;
}

html { overflow: hidden; height: 100%; }

body { overflow: auto; height: 100%; width: 600px; }