:root{--background:#fff;--surface:#f8fafc;--border:#e2e8f0;--text:#0f172a;--text-secondary:#64748b;--accent:#3b82f6;--accent-strong:#2563eb;--button-text:#fff;--danger:#dc2626}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--background:#0b132b;--surface:#1c2541;--border:#3a506b;--text:#f1f5f9;--text-secondary:#94a3b8;--accent:#60a5fa;--accent-strong:#3b82f6;--button-text:#fff;--danger:#f87171}}:root[data-theme=dark]{--background:#0b132b;--surface:#1c2541;--border:#3a506b;--text:#f1f5f9;--text-secondary:#94a3b8;--accent:#60a5fa;--accent-strong:#3b82f6;--button-text:#fff;--danger:#f87171}:root[data-theme=light]{--background:#fff;--surface:#f8fafc;--border:#e2e8f0;--text:#0f172a;--text-secondary:#64748b;--accent:#3b82f6;--accent-strong:#2563eb;--button-text:#fff;--danger:#dc2626}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--background);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;transition:background-color .2s,color .2s}