body {
    -moz-animation: bg 60s linear infinite;
    -webkit-animation: bg 60s linear infinite;
    background: #000000 url("bg.jpg") left bottom;
        background-repeat: no-repeat;
        background-size: cover;
        background-attachment: fixed;
    /* height: 100%;
    left: 0;
    opacity: 1;
    position: fixed;
    top: 0; */
}

.card-bgimage {
    height: 100%;
    background-repeat: no-repeat;
    background-size: cover !important;
    min-height: 30vh;
}

@media only screen and (max-width: 767px) {
    body {
      background-image: url("bg-sm.jpg");
    }
  }