.dashboard-bg {
  position: relative;
  min-height: 100vh;
  z-index: 1;
}
.dashboard-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/logo.png') center / contain no-repeat;
  background-size: 350px;  
  opacity: 0.5;    /* less transparent */
  z-index: -1;
}