<!DOCTYPE html>
<html lang="de">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Turnstunden WebApp</title>
  <link rel="stylesheet" href="/bootstrap/css/bootstrap.min.css">
</head>
<body>
  <nav class="navbar navbar-expand-lg navbar-light bg-light">
    <a class="navbar-brand" href="/">Turnstunden WebApp</a>
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarNav">
      <ul class="navbar-nav">
        <li class="nav-item">
          <a class="nav-link" href="/">Trainings</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="/riege">Riegen</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="/teilnehmer">Teilnehmende</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="/profile">Profil</a>
        </li>
        <% if (session && session.role === 'admin') { %>
          <li class="nav-item"><a class="nav-link" href="/admin">Admin</a></li>
        <% } %>
        <% if (session && session.userId) { %>
          <li><form action="/logout" method="post"><button type="submit">Logout</button></form></li>
        <% } else { %>
          <li class="nav-item"><a class="nav-link" href="/login">Login</a></li>
        <% } %>

      </ul>
    </div>
  </nav>
  <div class="container">
