:root{--primary:#1a56db;--primary-hover:#1648b8;--danger:#dc2626;--danger-hover:#b91c1c;--success:#16a34a;--warning:#d97706;--text:#1f2937;--text-secondary:#6b7280;--bg:#f9fafb;--surface:#fff;--border:#e5e7eb;--shadow:0 1px 3px #0000001a, 0 1px 2px #0000000f;--radius:6px;--sans:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;--focus-ring:#1a56db40;--highlight:#f0f4ff;--chart-control:#94a3b8;--chart-treated:#3b82f6;--chart-grid:#e5e7eb;--chart-label:#374151;--chart-sublabel:#6b7280}[data-theme=dark]{--primary:#4b8af0;--primary-hover:#6fa3f7;--danger:#f87171;--danger-hover:#ef4444;--success:#4ade80;--warning:#fbbf24;--text:#e5e7eb;--text-secondary:#9ca3af;--bg:#111827;--surface:#1f2937;--border:#374151;--shadow:0 1px 3px #0006, 0 1px 2px #0000004d;--focus-ring:#4b8af066;--highlight:#1e293b;--chart-control:#94a3b8;--chart-treated:#60a5fa;--chart-grid:#374151;--chart-label:#e5e7eb;--chart-sublabel:#9ca3af}*,:before,:after{box-sizing:border-box}body{font-family:var(--sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;margin:0;font-size:14px;line-height:1.5}#root,.app-layout{flex-direction:column;min-height:100vh;display:flex}.app-header{background:var(--surface);border-bottom:1px solid var(--border);height:56px;box-shadow:var(--shadow);justify-content:space-between;align-items:center;padding:0 24px;display:flex}.nav-left{align-items:center;gap:24px;display:flex}.nav-left a{color:var(--text-secondary);font-size:14px;font-weight:500;text-decoration:none}.nav-left a:hover{color:var(--primary)}.nav-left 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