我试图在下拉菜单旁边添加一个input元素，这样当下拉菜单打开时，它就不会覆盖输入。即使在设置输入框的显示属性为inline-block后，它仍然显示在下拉按钮元素的下面。我可以请一些帮助来找出为什么会发生这种情况，以及什么可能是解决方案吗？我尝试使用display属性并将其设置为inline-block，但它不起作用。

div.metric.two {
    display:block;
    position: relative;
    align-items: center;
    background-color: var(--blue);
    flex: 1 1 0%;
    padding: 2rem 1rem;
    max-width: 450px;
    width:100%;
}

.workout-header {
    display: block;
    align-items: center;
}

.dropdown {
    position: relative;
}

.dropbtn {
    display:flex;
    margin-right: 10px;
    background-color: var(--darker);
    border-radius: 1rem;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;
  }

  .dropbtn::after {
    content: "";
    display: inline-block;
    margin-left: 5px;
    width: 0;
    height: 0;
    border-top: 5px solid white;
    border-right: 5px solid transparent;
    border-left: 5px solid transparent;
    position: relative;
    top: -2px;
  }
  
  /* Style the dropdown content */
  .dropdown-content {
    display: none;
    background-color: var(--dark);
    align-items: flex-start;
    justify-content: flex-start;
    font-size: 20px;
    position: absolute;
    z-index: 1;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    border-radius: 1rem;
    padding: 8px 0;
    font-size: 14px;
  }

  .dropdown-content a {
    color: white;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    border-radius: 1rem;
  }
  
  .dropdown-content a:hover {
    background-color: var(--darker);
  }
  
  /* Show the dropdown menu on hover */
  .dropdown:hover .dropdown-content {
    display: inline-block;
  }
  
  /* Change the background color of the dropdown button when the dropdown content is shown */
  .dropdown:hover .dropbtn {
    background-color: var(--dark);
  }

  .exercise-input {
    display:inline-block;
    /* top:0; */
    /* left: calc(100% +10px); */
    background-color: var(--dark);
    margin-left: 4px;
    padding: 1rem;
    border-radius: 1rem;
    color:var(--light-gray)
  }

<div class="metric two">
  <div class="workout-header">
    <h2 class="title_workouts">Workouts</h2>
    <div class="dropdown">
      <button class="dropbtn">Workout Type</button>
      <div id="workoutsDropdown" class="dropdown-content">
        <a href="#">Weight Training 🏋️</a>
        <a href="#">Cardio 🏃</a>
        <a href="#">Calisthenics 💪</a>
      </div>
      <input type="text" name="exercise-input" class="exercise-input" placeholder="Exercise"/>
    </div>
  </div>
</div>