html,
body {
  height: 100%;
}
body {
  margin: 0;
  padding: 0;
}
body > .container {
  max-width: 540px;
}
.page-bg {
  z-index: -1;
  width: 100vw;
  height: calc(50vh + 250px);
  position: fixed;
  top: -250px;
  left: 0;
  overflow: hidden;
  transform: skewY(-12deg);
  background-color: #f6f7f8;
}
.form-signin {
  width: 100%;
  padding: 3rem 5rem 2rem;
  background-color: #fff;
  border-radius: .375rem;
}
.form-signin .checkbox {
  font-weight: 400;
}
.form-signin .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 10px;
  font-size: 16px;
}
.form-signin .input-group-text {
  padding: 0;
}
.form-signin .alert p {
  margin-bottom: 0;
}