body {
  min-height: 100vh;
  background-image: url("https://images.unsplash.com/photo-1579547945413-497e1b99dac0?w=1600&q=80");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  /* display: flex;
  align-items: center;
  justify-content: center; */
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(10, 20, 40, 0.55);
  z-index: 0;
}
.col-md-10 {
  position: relative;
  z-index: 1;
}

.col-md-10 {
  width: 100% !important;
  max-width: 100% !important;
  padding: 0 1.5rem;
}

.app-content {
  min-height: 100%;
}

.app-content .row.justify-content-center {
  min-height: calc(100vh - 160px);
  align-items: center;
}