html, body {
	font-family: sans-serif;
    height:100%;
}



.ahlert_logo {
 width: 185px;
 height:45px;
 background: url('weblogo.png') no-repeat;
 background-size: 185px 45px;
}

.ahlert_logo:hover {
   background: url('weblogo_hover.png') no-repeat;
   background-size: 185px 45px;
}

.flex-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  margin: 10, 10, 10, 10;
}