:root{--bg: #0f1117;--bg-card: #1a1d27;--bg-hover: #242836;--border: #2a2e3d;--text: #e4e6ed;--text-muted: #8b8fa3;--accent: #6366f1;--green: #22c55e;--red: #ef4444;--yellow: #eab308}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.app{max-width:1400px;margin:0 auto;padding:24px}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}.header h1{font-size:24px;font-weight:600}.sync-info{font-size:13px;color:var(--text-muted)}.tabs{display:flex;gap:4px;margin-bottom:24px;border-bottom:1px solid var(--border);padding-bottom:0}.tab{padding:8px 16px;border:none;background:none;color:var(--text-muted);font-size:14px;cursor:pointer;border-bottom:2px solid transparent;transition:all 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