:root{--background:#f6f7f8;--foreground:#131719;--muted:#687076;--muted-strong:#3f474d;--surface:#fff;--surface-alt:#eef2f3;--sidebar:#15191d;--sidebar-muted:#9ca6ad;--border:#d9dee2;--border-strong:#b9c2c8;--accent:#0891b2;--accent-strong:#0e7490;--success:#15803d;--warning:#b45309;--danger:#b91c1c;--danger-bg:#fef2f2;--shadow:0 20px 60px #0f172a1f;--radius:6px;--font-sans:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono:"SF Mono", "Cascadia Code", "Roboto Mono", ui-monospace, monospace}*{box-sizing:border-box}html,body{min-height:100%}body{background:var(--background);color:var(--foreground);font-family:var(--font-sans);letter-spacing:0;margin:0}a{color:inherit;text-decoration:none}button,select{font:inherit}.app-shell{grid-template-columns:260px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{background:var(--sidebar);color:#f9fafb;border-right:1px solid #242a30;flex-direction:column;gap:28px;padding:22px 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