My goal is to align characters in the center of a span.
CSS
span{border-radius:10px; width:20px; height:20px; color:#fff; background:#cc0000; text-align:center; line-height:20px; display:block;}
HTML
<span>+</span><br>
<span>-</span>
Upon inspection, you can notice that the characters are slightly off-center towards the bottom right. Is there a way to achieve perfect center alignment?
The reason for the distorted appearance is due to the use of even values for both height and width. Because the characters are only 1 pixel thick, they appear misaligned. To correct this, either increase the thickness to 2 pixels or adjust the width, height, and line-height to odd values. You can view the revised example on this updated fiddle link
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