Center text character ☢ vertically and horizontally within a circle (CSS)

Question

I am trying to center this text character ☢ within a circle. (☢)

While IE 10 displays the text vertically and horizontally centered, both Chrome and Firefox render too much padding at the top.

Any ideas how to fix this? (Flexbox is not a must have)

HTML

<div class="tl-icon">
<div>☢</div>
</div>

CSS

.tl-icon {
    align-items: center;
    background: black;
    border-radius: 50%;
    color: yellow;
    display: flex;
    font-size: 3em;
    height: 3rem;
    justify-content: center;
    width: 3rem;
}

See live demo here: http://codepen.io/dash/pen/ZYePWP

Answer 1

The problem is that the inner child is a text which screws with your height.

I added a line-height which seems to fix it a bit:

.tl-icon div{
  line-height:1px;
}

http://codepen.io/anon/pen/ZYePBZ

Answer 2

Target that child div, set it to inline-block and change the vertical alignment:

.tl-icon div{
  display: inline-block;
  vertical-align: top;
}

CODEPEN