.wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: url('login.jpg') center no-repeat;
  background-size: cover;
}

.content {
  text-align: center;
  width: inherit;
  height: inherit;
  display: table-cell;
  vertical-align: middle;
}

#login {
  display: inline-block;
  font-family: Monaco;
  font-weight: 900;
  font-size: 2vmax;
  background-color: rgba(81,81,81,0.4);
  border-radius: 10px;
  box-shadow: 10px 10px 5px;
  text-shadow: 2px 2px 3px #b3aa9e;
  padding: 25px;
  width: 40vw;
}

.errormsg {
  color: red;
  font-size: 1vmax;
  width: 100%;
  margin: 1em auto;
}

.content sup { color: red;}

#login .btn-primary {
  color: #fff;
  background-color: #337ab7;
  visibility: visible;
}

#login .btn-primary:hover {
  color: inherit;
  background-color: inherit;
}

label {
  width: 5em;
}