body{color:#222;background:#fff;max-width:60rem;margin:1rem auto;padding:0 1rem;font-family:system-ui,sans-serif}nav{margin-bottom:1rem}table{border-collapse:collapse;font-size:.85rem}td,th{text-align:left;border:1px solid #ccc;padding:2px 6px}tr.fail{background:#fdd}pre{background:#f6f6f6;padding:.5rem;font-size:.8rem;overflow-x:auto}canvas{border:1px solid #ccc;max-width:100%}.error{color:#b00;font-weight:700}label{margin-right:1rem}