Create a 20x20 SVG outline icon for a web application. Icon: bell Meaning: alerts and updates for users Style Guidelines: - Strict 20x20 grid - Outline style only - Primary stroke: 1px (mandatory, consistent) - Inner details may use slightly thinner stroke ONLY if necessary - Stroke: rounded caps and joins - No fill - Slightly rounded corners (1–2px radius) - Balanced spacing (not too tight, not too loose) - Strictly centered and visually symmetrical Design Constraints: - Maximum 2–4 paths - No unnecessary details or micro elements - Keep shapes simple, clean, and readable at small sizes - Avoid visual clutter and overlapping complexity - Maintain consistent visual weight Consistency Rules: - Must match a cohesive icon family (same stroke, spacing, geometry) - Should feel consistent with other UI system icons - Use minimal geometry and clear structure Metaphor Guidance: - Prefer literal representation where possible - Use system-based metaphors for complex concepts (nodes, flows, connections) - Ensure the icon clearly communicates its function Output: - Clean, optimized SVG code - No extra groups or unnecessary attributes

The image shows a black and white drawing of a bell on a white background. The bell is outlined in black, giving it a distinct look.