html {
  height: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  padding: 0;
  background-color: #fff;
  text-align: center;
  position: relative;
}

.logo {
  width: 125px;
  height: 125px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}