body {
     margin: 0;
     padding: 0;
     background-image: url(../img/index_bg.png);
     background-repeat: no-repeat;
     background-size: 200%;
     background-position: center;
     background-color: #0A234A;
 }

 .overlay {
     position: absolute;
     top: 50%;
     left: 50%;
     transform: translate(-50%, -50%);
     text-align: center;
 }

 .overlay a {
     color: white;
     text-decoration: none;
     font-size: 18px;
 }

 .overlay {
     color: #cacaca;
 }

 .img-fluid {
     max-width: 80%;
     height: auto;
 }