Search field border

I’m using the 4th Header Layout, the thin and black one. When I click on the search icon, in the search popup the field has bright corner with rounded edges while focused. Not tested with other layouts.

To remove it you might want to add the line:
outline: none;

to this part:

[type=”search”] {
-webkit-appearance: textfield; /* 1 */
outline-offset: -2px; /* 2 */
}