templates/public_layout.html

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>{{ title }}</title>
    <link rel="stylesheet" href="{{ url_for("static", "css/styles.css") }}">
</head>
<body>
    <div class="ambient-light" aria-hidden="true">
        <div class="ambient-blob ambient-blob-violet"></div>
        <div class="ambient-blob ambient-blob-pink"></div>
        <div class="ambient-blob ambient-blob-blue"></div>
    </div>
    <header class="site-header public-header">
        <span class="site-title">Card Collection</span>
        <span class="public-header-note">One card every day</span>
    </header>
    <main class="public-main">
        {% block content %}{% endblock %}
    </main>
</body>
</html>