I have a final project I'm working on for a class that requires the use of a form on one page. Long story short, I want to have the form display when hovering over a "contact" button. However, when hovering in the space the form occupies, it *also* appears. How can I remove the hover event from firing on a node's children *without* JavaScript? This is a basic web authoring class, so I don't want to use JavaScript unless necessary. 

I also want to keep the transition on the `.droptainer`. Setting `display: none` to `display: block` on hover removes the transition since the display property can't be animated.

```css
/* styles for the navigation menu */

nav ul {
  list-style: none;
  position: relative;
  padding: 0;
  display: grid;
  grid-template: auto / repeat(5, 1fr);
  align-content: center;
}

nav ul ul {
    display: none;
    position: absolute;
    top: 100%;
    width: 20%;
}

nav ul li:hover > ul {
    display: block;    
}

nav>ul::after {
    content: "";
    clear: both;
    display: block;
}

nav ul ul li {

    float: none;
}

nav ul li a:hover {
  color: black;
  background-color: orange;
  transition: 500ms;
}

nav ul li a {
    border: 2px solid gray;
    border-radius: 10px;
    text-align: center;
    display: block;
    padding: .7em 0;
    text-decoration: none;
    background-color: black;
    color: floralwhite;
}

/* styles for the dropdown form */

.droptainer {
  opacity: 0;
  display: block;
  position: absolute;
  top: 100%;
  left: 60%;
  margin: 0.5%;
  padding: 2em 10%;
  background-color: orange;
  border: 2px solid gray;
  border-radius: 15px;
  box-shadow: 5px -5px 12px 4px rgba(0, 0, 0, 0.50);
  transform: translatey(-5%);
  transition: 600ms 250ms;

}

.drop_btn:hover > .droptainer {
  transform: translatey(5%);
  opacity: 1;  
}

.droptainer:after {
  content: "";
  position: absolute;
  top: -9%;
  left: 50%;
  width: 50%;
  height: 1.75em;
  }
```

```html
 <nav class="nav_menu" role="navigation">
    <ul>
      <li><a href="index.html">Home</a></li>
      <li><a href="nav/ingredients.html">Ingredients</a>
        <ul>
          <li><a href="nav/fish.html">Fish</a></li>
          <li><a href="nav/vegetables.html">Vegetables</a></li>
          <li><a href="nav/condiments.html">Condiments</a></li>
          <li><a href="nav/others.html">Others</a></li>
        </ul>
      </li>
      <li><a href="nav/history.html">History</a></li>
      <li><a href="nav/trivia.html">Trivia</a></li>
      <li class="drop_btn">
        <a href="#">Contact</a>
        <div class="droptainer">
          <h3>Sign up for the latest sushi news</h3>
          <form>
            <label>Name</label>
            <input type="text">
            <input type="text">
            <label>Email</label>
            <input type="text">
            <input type="checkbox">
            <input type="checkbox">
            <label>I want to sign up for SushiNews.</label>
            <button>Submit</button>
            <button>Reset</button>
          </form>
        </div>
      </li>
    </ul>
</nav>
```