html{
    min-height:100%;
    position:relative;
}
body{
    background-color: #0F1925 !important;
    height: 100%;
}

.main{
  height: 100%;  
}
.center{
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}