:root{--bg: #0f1216;--bg-soft: #131920;--panel: #161b22;--line: #262d36;--ink: #e6edf3;--muted: #8b949e;--accent: #58a6ff;--accent-soft: rgba(88, 166, 255, .12);--danger: #f85149;--radius: 12px}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}button{font:inherit}.app{display:flex;flex-direction:column;height:100%}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#121820,#0f1216)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{font-size:22px;line-height:1}.brand strong{display:block;font-size:16px;letter-spacing:.01em}.brand small{color:var(--muted);font-size:12px}.topbar-actions{display:flex;gap:10px}.btn{background:var(--accent);color:#08111f;border:0;border-radius:9px;padding:9px 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