html {
     height: 100%
 }

 body {
     margin: 0;
     min-height: 100%;
     background-color: #171A1C;
     background-size: 100% 100%;
 }

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

 .contain {
     display: block;
     width: 100%;
     height: 100%;
     object-fit: contain;
 }

 .stretch {
     display: block;
     width: 100%;
     height: 100%;
 }

 .cover {
     display: block;
     width: 100%;
     height: 100%;
     object-fit: cover;
 }

 .bottom {
     position: absolute;
     bottom: 0;
     left: 50%;
     -ms-transform: translate(-50%, 0);
     transform: translate(-50%, 0);
 }

 .bottomLeft {
     position: absolute;
     bottom: 0;
     left: 0;
 }

 .bottomRight {
     position: absolute;
     bottom: 0;
     right: 0;
 }