.btn 
  {
   outline:0;
   border:none;
   border-top:none;
   border-bottom:none;
   border-left:none;
   border-right:none;
   box-shadow:inset 2px -3px rgba(0,0,0,0.15);
  }
  .btn:focus
  {
   outline:0;
   -webkit-outline:0;
   -moz-outline:0;
  }

 
  }
  .form-signin .form-signin-heading, .form-signin {
    margin-bottom: 10px;
  }
  .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-top-left-radius: 4px;
    border-top-right-radius: 4px;
    border-top-style: solid;
    border-right-style: solid;
    border-bottom-style: none;
    border-left-style: solid;
    border-color: #000;
  }
  .form-signin input[type="password"] {
    margin-bottom: 10px;
    border-bottom-left-radius: 4px;
    border-bottom-right-radius: 4px;
    border-top-style: none;
    border-right-style: solid;
    border-bottom-style: solid;
    border-left-style: solid;
    border-color: rgb(0,0,0);
    border-top:1px solid rgba(0,0,0,0.08);
  }
  .form-signin-heading {
    color: #fff;
    text-align: center;
    text-shadow: 0 2px 2px rgba(0,0,0,0.5);
  }

 

  .bg-overlay {
    background: linear-gradient(rgba(0,0,0,.7), rgba(0,0,0,.7)), url("https://xperiential.com/wp-content/uploads/2016/10/bigstock-Laboratory-7281638.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    color: #fff;
    height: 100%;
    min-height: 800px;
    padding-top: 50px;
}

.bg-no-overlay {
    background: url("https://xperiential.com/wp-content/uploads/2016/10/bigstock-Laboratory-7281638.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    color: #fff;
    height: 450px;
    padding-top: 50px;
}