html,
body {
  height: auto;
}

body {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  background-color: #121212;
}

h2 {
  color: #18E591;
}

h6 {
  color: #fff;
  max-width: 850px;
  margin: 0 auto;
}

.form-signin {
  width: 100%;
  max-width: 500px;
  padding: 15px;
  margin: auto;
}
.form-signin .checkbox {
  font-weight: 400;
}
.form-control:focus {
  border-color: #18E591;
  outline: 0;
  box-shadow: 0 0 0 .2rem rgba(0,123,255,.25);
}
.form-signin .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 6px;
  font-size: 16px;
  margin-top:12px;
  background-color: rgba(255,255,255,0.8);
}
.form-signin .form-control:focus {
  z-index: 2;
}
.form-signin input[type="email"] {
  margin-bottom: -1px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}
.form-signin input[type="password"] {
  margin-bottom: 10px;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
.bd-placeholder-img {
  font-size: 1.125rem;
  text-anchor: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.form-group {
  margin-bottom: 0 !important;
}

.form-group label {
  margin-bottom: 0.25rem;
  color: #efefef;
}

.form-check {
  display: block;
  width: 100%;
  font-weight: 400;
  line-height: 1.5;
  color: #495057;
  background-color: rgba(255,255,255,0.8);
  background-clip: padding-box;
  border: 1px solid #ced4da;
  border-radius: .25rem;
  transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
  padding: 6px;
  margin-top: 12px;
}

.form-check label {
  color: #495057;
  margin-left: 25px;
}

.form-check-input {
  margin-left: 0;
}

.btn-primary {
  background: #18E591 !important;
  border-color: #18E591 !important;
  margin-top: 20px;
}

.text-muted {
  color: #fff !important;
}

  @media (min-width: 768px) {
    .form-signin {
      max-width: 750px;
    }
    .bd-placeholder-img-lg {
      font-size: 3.5rem;
    }
  }