When styling an HTML element like paper-input and disabled a dotted underline style is added.
I can edit the disabled styles like
paper-input {
--paper-input-container-disabled: {
color: black;
opacity: 1;
text-decoration: none;
};
}
But setting the text-decoration does not hide this style.
How can I set the CSS to hide this disabled underline style?

You can add the display: none property to remove the underline.
Try removing the root if It doesn't work for you.