:root{--teal: #0f766e;--teal-dark: #115e59;--teal-50: #f0fdfa;--ink: #0f172a;--muted: #64748b;--line: #e2e8f0;--bg: #f8fafc;--card: #ffffff;--green: #16a34a;--amber: #d97706;--red: #dc2626;--blue: #2563eb;--radius: 12px;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .06)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--teal)}h1,h2,h3,h4{margin:0 0 .5rem;line-height:1.2}.app-shell{display:flex;min-height:100vh}.sidebar{width:232px;background:var(--ink);color:#cbd5e1;flex-shrink:0;display:flex;flex-direction:column;padding:16px 0}.sidebar .brand{color:#fff;font-weight:700;font-size:18px;padding:8px 20px 20px;display:flex;align-items:center;gap:8px}.sidebar nav{display:flex;flex-direction:column;gap:2px}.sidebar nav 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