:root{--bg: #0d1117;--bg-elev: #161b22;--bg-elev2: #1c232c;--border: #2a313c;--text: #e6edf3;--muted: #8b949e;--accent: #2f81f7;--accent-hover: #4493f8;--green: #3fb950;--red: #f85149;--amber: #d29922;--purple: #a371f7;--radius: 8px;--mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:14px}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.center{height:100%;display:flex;align-items:center;justify-content:center}.muted{color:var(--muted)}.mono{font-family:var(--mono)}.row{display:flex;align-items:center;gap:10px}.spacer{flex:1}.btn{background:var(--bg-elev2);color:var(--text);border:1px solid var(--border);padding:7px 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