.card-deck .card {
  min-width: 320px;
}

body {
  padding-bottom: 40px;
/*  background-color: #333; */
 /* color: #fff !important; */
}

@media screen and (prefers-color-scheme: light) {
  body {
    padding-bottom: 40px;
  }
}

.form-signin {
  max-width: 330px;
  padding: 15px;
  margin: 0 auto;
}
.form-signin .form-signin-heading,
.form-signin .checkbox {
  margin-bottom: 10px;
}
.form-signin .checkbox {
  font-weight: normal;
}
.form-signin .form-control {
  position: relative;
  height: auto;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  padding: 10px;
  font-size: 16px;
}
.form-signin .form-control:focus {
  z-index: 2;
}