html,
body {
  height: 100%;
}
body {
  background: url('/img/fondo.jpg') no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  background-size: cover;
  -o-background-size: cover;
}

body {
  display: flex;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  background-color: #f5f5f5;
}

.form-signin {
  max-width: 330px;
  padding: 15px;
}

.form-signin .form-floating:focus-within {
  z-index: 2;
}

.form-signin input[type="rfc"] {
  margin-bottom: 10px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}