header.php

<!doctype html>
<html lang="en">
<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="css/bootstrap.min.css">
    <script src="https://kit.fontawesome.com/36f28b9983.js" crossorigin="anonymous"></script>
    <link rel="stylesheet" href="css/main.css">
	<script src="js/main.js"></script>
	
    <title>Not Defterim</title>
</head>

<body>
      
    <div class="container my-5">
        <nav class="navbar navbar-expand-lg navbar-light mb-5 rounded shadow"style="background:linear-gradient(45deg, #D8BFD8,);">
            <a href="login.php" class="navbar-brand mx-5">Not Defterim</a>
            <div class="collapse navbar-collapse" id="navbar-container"></div>
        </nav>