Bootstrap 4: text alignment button with icon

Question

So, I make a button with an icon on the left. And the alignment is confused. My text does not align in the middle with the icon, and I do not know how to fix it. Linear height doesn't seem to do anything. Or touch indents / margins because I added the registration to the icon area, because I need it to be darker than the text background.

Here's a preview image:

Is there a way to fix the alignment? Or is there a way to make this button type easier with Bootstrap 4?

Here is my code:

.btn-primary {
    background-color: #3382c7;
    font-size: 10px;
    font-weight: bold;
    text-transform: uppercase;
    span {
      padding-left: 25px;
      padding-right: 25px;
    }
    i {
      font-size: 20px;
      background-color: #306fa5;
      padding: 15px 20px;
    }
  }

<a href="#" class="btn btn-primary border-0 rounded-0 p-0">
  <i class="fa fa-play" aria-hidden="true"></i>
  <span>Click here to Play</span>
</a>

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Answer 1

align-middle .

<div class="container">
    <a href="#" class="btn btn-primary border-0 rounded-0 p-0">
        <i class="fa fa-play align-middle" aria-hidden="true"></i>
        <span class="align-middle">Click here to Play</span>
    </a>
</div>

http://www.codeply.com/go/xuiy1703Dv

Answer 2

! , : ; .

.btn-primary {
    background-color: #3382c7;
    font-size: 10px;
    font-weight: bold;
    text-transform: uppercase;
    span {
      padding-left: 25px;
      padding-right: 25px;
    }
    i {
      font-size: 20px;
      background-color: #306fa5;
      padding: 15px 20px;
      vertical-align:middle;
    }
  }

<a href="#" class="btn btn-primary border-0 rounded-0 p-0">
  <i class="fa fa-play" aria-hidden="true"></i>
  <span>Click here to Play</span>
</a>

Hide result

Answer 3

If you make them display: inline-blockand vertical-align: middleit should work for you

.btn-primary {
    background-color: #3382c7;
    display: inline-block;
    font-size: 10px;
    font-weight: bold;
    text-transform: uppercase;
}

.btn-primary span {
    display: inline-block;
    padding-left: 25px;
    padding-right: 25px;
    vertical-align: middle;
}

.btn-primary i {
    font-size: 20px;
    display: inline-block;
    background-color: #306fa5;
    padding: 15px 20px;
    vertical-align: middle;
}

<a href="#" class="btn btn-primary border-0 rounded-0 p-0">
  <i class="fa fa-play" aria-hidden="true"></i>
  <span>Click here to Play</span>
</a>

Run codeHide result