An app-level alert appears at the top of the screen, above the application header. This alert is reserved for a system-level message.
<div class="alert alert-app-level alert-danger">
<button type="button" class="close" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
<div class="alert-item">
<div class="alert-text">
Alert Type: Danger
</div>
<div class="alert-actions">
<button class="btn alert-action">Action</button>
</div>
</div>
</div>
Inverse buttons can be used on dark backgrounds
<button type="submit" class="btn btn-inverse">Inverse</button>