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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>404 - Page Not Found</title>

<style>
    *{
        margin:0;
        padding:0;
        box-sizing:border-box;
        font-family: Arial, Helvetica, sans-serif;
    }

    body{
        min-height:100vh;
        display:flex;
        align-items:center;
        justify-content:center;
        background:#f7f8fa;
        color:#333;
    }

    .container{
        text-align:center;
        max-width:600px;
        padding:40px;
    }

    .error-code{
        font-size:100px;
        font-weight:700;
        color:#e74c3c;
        line-height:1;
        margin-bottom:15px;
    }

    h1{
        font-size:32px;
        margin-bottom:15px;
    }

    p{
        font-size:16px;
        color:#777;
        line-height:1.6;
        margin-bottom:30px;
    }

    .button{
        display:inline-block;
        text-decoration:none;
        background:#222;
        color:#fff;
        padding:14px 28px;
        border-radius:8px;
        transition:.3s;
    }

    .button:hover{
        opacity:0.85;
    }

    @media(max-width:768px){
        .error-code{
            font-size:70px;
        }

        h1{
            font-size:24px;
        }
    }
</style>
</head>
<body>

<div class="container">
    <div class="error-code">403</div>

    <h1>Page Not Found</h1>

    <p>
        Sorry, the page you are looking for may have been moved,
        removed, or is temporarily unavailable.
    </p>

    <a href="/" class="button">
        Return to Homepage
    </a>
</div>

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