body,html{
  height: 100%; 
  overflow: hidden;
  background-image: url(https://i.imgur.com/X97iVv1.jpg);
  background-size: cover;
}

.l-form{
  background-color:rgba(39, 41, 45, 0.5);
  border-radius:12px;
  padding: 12px;
}

.i-form{
  border-radius:12px;
  padding: 10px;
}