html,
body {
  height: 100%;
}

body {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: center;
  background-image: url("../img/signin.jpg");
  background-size: cover;  
}
img.appicon {
    overflow: hidden;
    margin: -65px 0 20px;
    /*max-width: 90px; */
    max-height: 150px;
    border: 1px solid black;
    border-radius: 22%;
}
.form-signin {
    width: 100%;
    max-width: 350px;
    padding: 15px;
    margin: auto;
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 5px 40px 0px #000;
}

.main {
    display: flex;
    width: 100%;
    min-height: 100%;
}

.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;
}
.input-group-text{
  background-color: #fff; 
}