body{margin:1rem;font-family:system-ui,sans-serif}fieldset{grid-template-columns:repeat(auto-fill,minmax(16rem,1fr));gap:.5rem;display:grid}.toolbar{gap:.5rem;margin-bottom:1rem;display:flex}.button{cursor:pointer;background:#eee;border:1px solid #888;padding:1px 6px}.error{color:#b00;white-space:pre-wrap}[role=tablist]{margin-top:1rem}[role=tab][aria-selected=true]{font-weight:700}