Tip Calculator App

Hi! This is my first submission of FEM challenge. The design is close enough to the original. However, I find it difficult to make the third input show the error state whenever the user puts the value of 0.

    <div class="input-wrapper">
              <input class="input-text" type="text" name="people" id="people" placeholder="1">
              <img src="./images/icon-person.svg" alt="person-icon">
    </div>

Any feedback would be appreciated. Thanks!