templates/login.html

{% extends 'base.html' %}
{% block content %}
<div class="container">
    <h1>Login</h1>
    <form method="POST" action="/login">
        <input type="email" name="email" placeholder="Email" required>
        <input type="password" name="password" placeholder="Password" required>
        <button type="submit">Login</button>
    </form>
    <p>Don't have an account? <a href="/signup">Sign up</a></p>
    {% if error %}
    <p class="error">{{ error }}</p>
    {% endif %}
</div>
{% endblock %}