<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Login Form</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" href="custome.css">
</head>
<body>
<div class="" style="margin-top: 150px;"></div>
<div class="container">
<div class="row">
<div class="col-md-6">
<div class="card">
<div class="card-header">
<h5>Login Form</h5>
</div>
<div class="card-body">
<form action="" method="post">
<div class="input-group mb-3 input-group-sm">
<div class="input-group-prepend" style="">
<span class="input-group-text custome-css">User Name:</span>
</div>
<input type="text" class="form-control" placeholder="Enter username">
</div>
<div class="input-group mb-1 input-group-sm">
<div class="input-group-prepend addon1">