{% if error %}
  <div class="pf-banner bad">Preflight could not run: {{ error }}</div>
{% elif not ready %}
  <div class="pf-banner bad">
    <strong>This machine is not ready to run a paper.</strong>
    {{ blockers | join(", ") }} failed — a run started now will fail several
    minutes in. <a href="/preflight">See what is wrong</a>.
  </div>
{% else %}
  <div class="pf-banner ok">
    Ready — {{ n_pass }} checks passed{% if n_skip %}, {{ n_skip }} optional skipped{% endif %}.
    <a href="/preflight">Details</a>
  </div>
{% endif %}