:root{--bg: #f5f6f8;--card: #fff;--ink: #16181d;--muted: #6b7280;--line: #d9dce3;--brand: #1d4ed8;--brand-ink: #fff;--bad: #b91c1c;--ok: #15803d;--key: #2b2f36;--key-ink: #f3f4f6}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}#root{min-height:100vh}h2,h3,h4{margin:1.2em 0 .5em}h3:first-child{margin-top:0}p{margin:.4em 0}.lead{color:#374151}.hint,.muted{color:var(--muted);font-size:13px}.small{font-size:13px}.note{background:#fff7ed;border:1px solid #fed7aa;padding:8px 10px;border-radius:6px;font-size:13px}.bad-text{color:var(--bad)}.mono{font-family:ui-monospace,Menlo,Consolas,monospace}input,select{font:inherit;padding:7px 9px;border:1px solid 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