:root{--accent: #2563eb;--accent-dark: #1d4ed8;--accent-soft: #eff6ff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0;--bg: #f8fafc;--sidebar-w: 240px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.bo-layout{display:flex;min-height:100vh}.bo-sidebar{width:var(--sidebar-w);background:#fff;border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:50}.bo-brand{padding:20px 24px;font-size:20px;font-weight:800;color:var(--accent);border-bottom:1px solid var(--border)}.bo-nav{flex:1;padding:16px 0;overflow-y:auto}.bo-nav-section{padding:8px 16px 4px;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:#94a3b8}.bo-nav a{display:flex;align-items:center;gap:10px;padding:9px 20px;font-size:14px;font-weight:500;color:var(--muted);text-decoration:none;transition:all 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