*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--color-brand:#0f766e;--color-brand-light:#ccfbf1;--color-brand-dark:#0d3330;--color-bg:#f8fafc;--color-surface:#fff;--color-border:#e2e8f0;--color-text:#0f172a;--color-text-muted:#64748b;--color-danger:#ef4444;--color-success:#22c55e;--color-warning:#f59e0b;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--shadow-sm:0 1px 3px rgba(0,0,0,.07);--shadow-md:0 4px 16px rgba(0,0,0,.08)}[data-theme=dark]{--color-bg:#0a0f1e;--color-surface:#111827;--color-border:#1f2937;--color-text:#f1f5f9;--color-text-muted:#94a3b8}[data-theme=minimal]{--color-brand:#1a1a1a;--color-brand-light:#f5f5f5}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);font-size:14px;line-height:1.6}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}