resources/views/ask-for-access-code-form.blade.php

<!DOCTYPE html>
<html>
<head>
    <title>Password protected</title>

    <link href="https://fonts.googleapis.com/css?family=Lato:100" rel="stylesheet" type="text/css">

    <style>
        html, body {
            height: 100%;
        }

        body {
            margin: 0;
            padding: 0;
            width: 100%;
            display: table;
            font-weight: 100;
            font-family: 'Lato';
        }

        .container {
            text-align: center;
            display: table-cell;
            vertical-align: middle;
        }

        .content {
            text-align: center;
            display: inline-block;
        }

        .title {
            font-size: 36px;
        }

        .form-control {
            border: 1px solid #ccc;
            padding: 10px 20px;
        }

        .hidden {
            display: none;
        }

        .text-danger {
            color: #d9534f;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="content">
        <div class="title">Enter access code</div>

        <form method="GET">
            {{ csrf_field() }}

            <div class="form-group">

                <input type="password" name="access-code" placeholder="Please enter access code" class="form-control" tabindex="1" autofocus />
                @if (Request::get('access-code'))
                    <div class="text-danger">Access code is wrong</div>
                @else
                    <div class="small help-block">And press enter</div>
                @endif
            </div>

            <input type="submit" class="hidden" />

        </form>
    </div>
</div>
</body>
</html>