:root{--bg: #f6f6f7;--card: #ffffff;--line: #e1e3e5;--text: #202223;--muted: #6d7175;--primary: #4169e1;--sidebar: #1a1a2e;--danger: #e02424;--warning: #d97706;--ok: #16a34a}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:Segoe UI,SF Pro Text,sans-serif;font-size:13px;color:var(--text);background:var(--bg)}button,input,select{font:inherit}.shell{min-height:100%}.app-nav-fallback{border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;gap:16px;padding:8px 20px;min-height:50px}.app-nav-brand{display:flex;align-items:center;gap:8px;font-weight:700;white-space:nowrap}.app-nav-brand-icon{width:28px;height:28px;border-radius:6px;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:700;font-size:11px}.app-nav-links{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.nav-item{display:inline-flex;align-items:center;gap:6px;min-height:32px;padding:6px 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