html,
body {
  height: 100%;
  background-image: url("background.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  box-shadow: inset 0 0 0 1000px rgba(0 0 0 / 58%);
}

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

.form-signin {
  width: 100%;
  max-width: 330px;
  padding: 15px;
  margin: auto;
}
.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 .form-control:focus {
  z-index: 2;
}
.form-signin input[type="email"] {
  margin-bottom: -1px;
}
.form-signin input[type="password"] {
  margin-bottom: 10px;
}