<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 name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.6.0/css/all.css" integrity="sha384-aOkxzJ5uQz7WBObEZcHvV5JvRW3TUc2rNPA7pe3AwnsUohiw1Vj2Rgx2KSOkF5+h" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="login.css" />
<title>İSTE MEZUN PORTALI</title>
</head>
<body >
<div class="container">
<div style="text-align:center"><img class="mt-2"src="https://i.ibb.co/rxKLQ4S/19-1-User-512.png" alt="photo" style="width:20%"></div>
<div class="d-flex justify-content-center h-100">
<div class="card ">
<div class="card-header">
<h2 class="text-center text-light">Login</h2>
</div>
<div class="card-body">
<form class="needs-validation">
<div class="input-group form-group">
<div class="input-group-prepend">
<span class="input-group-text"><i class='fas fa-user-graduate ml-2' style='font-size:23px'></i></span>
<input type="text" class="form-control" placeholder="Email" id="tbEmail" required>
</div>
