html {
  background: #222 url('../img/bg_login.jpg') no-repeat center center fixed; 
   -webkit-background-size: cover;
   -moz-background-size: cover;
   -o-background-size: cover;
   background-size: cover;
}
body {
  background: transparent !important;
}
.wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.form-signin {
  max-width: 380px;
  padding: 15px 35px 45px;
  margin: 0 auto;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.1);
}
.form-signin .form-signin-heading, .form-signin {
  margin-bottom: 30px;
}
.form-signin .form-control {
  position: relative;
  font-size: 16px;
  height: auto;
  padding: 10px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
.form-signin .form-control:focus {
  z-index: 2;
}
.form-signin input[type="text"] {
  margin-bottom: -1px;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}
.form-signin input[type="password"] {
  margin-bottom: 20px;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
.form-signin-heading {
  text-align: center;
}
button {
  margin-top:30px;
}