title: How to remove a strange border in css
body: <p>I was trying to make a [border, but there is always a strange border appear under it, I was try to see what happened and I found there is a &quot;shadow root&quot; and there is a strange div there but I cant remove it, can someone help me? thanks</p>
  <p>Picture of the strange border appearing:</p>
  <p><a href="https://i.stack.imgur.com/xkI4o.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xkI4o.png" alt="strange border" /></a></p>
  <p>I found a strange div and shadow root here (I don't write this div and shadow root)</p>
  <p>Picture of the strange div:</p>
  <p><a href="https://i.stack.imgur.com/mSnIL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mSnIL.png" alt="strange div" /></a></p>