CSS width 100% OR max-width in pixels

Question

How one could create a CSS rule for width which

• Uses 100% width by default

• If 100% width exceeds certain pixel width (let\'s say 512 px), th

Answer 1

If it's block level element it should be 100% by default so no need to declare the width, then max-width: 512px; would curtail it

calc() is not supported very well at all, but in this case I wouldn't think you would need it