<div id="open-alert" class="alert alert-warning" role="alert">
-<h4>Friendly reminder</h4>
+<h3>Friendly reminder</h3>
The timer for a problem starts when you open the problem. You will lose points if you open all problems at the same time.
</div>
<div id="beginner">
<h2>Beginner</h2>
-<table border class="table table-bordered table-striped table-fixed">
+<table class="table table-striped table-fixed">
<thead><tr><th>Name<th>Author<th>Owner</thead>
<tbody>