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Optimize the selected icons for crisp web rendering at exactly 16×16 px.
Rebuild them for a native 16×16 pixel grid instead of simply scaling.
Use 1 px strokes for outline icons, avoid 0.5 px strokes and unnecessary fractional coordinates.
Align key horizontal and vertical lines to the pixel grid, keep consistent visual weight and padding across all icons.
Export with viewBox="0 0 16 16".
Preserve the original icon shapes and style, but make them pixel-perfect and sharp at 100% browser zoom.