style.css

body {
    padding-top: 10px;
    padding-bottom: 10px;
    position: relative;
  }
  
  body::before {
    background: url(image.jpg) no-repeat center center fixed;
    content: '';
    z-index: -1;
    width: 100%;
    height: 100%;
    position:absolute; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    -webkit-filter: blur(5px);
    -moz-filter: blur(5px);
    -o-filter: blur(5px);
    -ms-filter: blur(5px);
    filter: blur(5px);
  }

.login-box{
    max-width: 700px;
    float: none;
    margin: 150px auto;
}

.login-left{
      background: rgba(211, 211, 211, 0.5);
      padding: 30px;
}


.login-right{
    background: grey;
      padding: 30px;
}

.form-control{
    background-color: transparent !important;
}