html, body {
    height:100%;
} 
body {
    background-color: #023175;
    background-image: url('background.png');
    background-size: 100%;
    background-repeat: no-repeat;
}
.container{width:85%;margin-top:12%}
.box-login{background:#F1F3FF;padding:15px;border-radius:15px;margin-top:50px}
.bx-log{background:#1E3368;padding:8px 5px;color:#FFFFFF;text-align:center;border-radius:5px;font-size:22px}
.form-signin {
  max-width: 330px;
  padding: 15px;
  margin: 0 auto;
}
.form-signin .form-signin-heading,
.form-signin .checkbox {
  margin-bottom: 10px;
}
.form-signin .checkbox {
  font-weight: normal;
}
.form-signin .form-control {
  position: relative;
  height: auto;
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
  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;
}