html,
body {
  height: 100%;
}

body {
    /*background-repeat: no-repeat;*/
    /*background-image: linear-gradient(135deg, rgba(31,123,229,1) 0%, rgba(58,139,232,1) 47%, rgba(70,153,234,1) 92%, rgba(72,156,234,1) 100%);*/
    /*background: url(http://lorempixel.com/1920/1920/city/9/) no-repeat center center fixed;*/
    /*background: url(../img/images.jpg) repeat right center fixed;*/
    /*background-size: 40% 40%;*/
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
/*    padding-top: 40px;
    padding-bottom: 40px;
    background-color: black; /* #f5f5f5;     */
}

.form-signin {
  width: 100%;
  max-width: 325px;
  padding: 15px;
  margin: -16px;
}
.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;
  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;
}