:root{--bg:#0b0d10;--panel:#14181d;--panel2:#1b2128;--line:#2a333d;--text:#f5f7fa;--muted:#9aa6b2;--accent:#f4d03f;--danger:#ff5a5f;--ok:#30c48d;--shadow:0 18px 50px rgba(0,0,0,.28)}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}body{min-height:100vh}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.hidden{display:none!important}.center{display:grid;place-items:center;padding:24px}.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}.narrow{width:min(480px,100%)}.standalone{max-width:1100px;margin:auto;padding:32px}.btn{border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:12px;padding:12px 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