minimum tooltip

HTML

<div class="box">
    <span class="tooltip bottom" aria-label="tooltip here">
        text hover show tooltip bottom
    </span>
</div>

<div class="box">
    <span class="tooltip right" aria-label="tooltip here">
        text hover show tooltip right
    </span>
</div>

<div class="box">
    <span class="tooltip left" aria-label="tooltip here">
        text hover show tooltip left
    </span>
</div>



<div class="box">
    <span class="tooltip top" aria-label="tooltip here">
        text hover show tooltip top
    </span>
</div>

<div class="box">
    <div class="relative">
      <input type="text" placeholder="input forcus show tooltip" aria-describedby="input-tooltip">
      <div role="tooltip" class="tooltip bottom" id="input-tooltip">tooltip fot form</div>
        </div>
</div>

CSS

.box
{
    margin-bottom: 50px;
    padding-bottom: 50px;
    padding-left: 150px;
    border-bottom: 1px solid #eee;
}

input
{
    width: 200px;
    height: 1em;
    padding: 6px 8px;

    border: 1px solid #eee;
    border-radius: 3px;
}

.relative
{
    position: relative;
}

/* tooltip */

.tooltip
{
    position: relative;
}

.tooltip:after
{
    position: absolute;
    z-index: 9999;

    display: none;

    padding: 5px 8px;

    content: attr(aria-label);
    text-align: center;
    white-space: pre;
    text-decoration: none;
    letter-spacing: normal;
    text-transform: none;
    word-wrap: break-word;

    opacity: 0;
    color: #fff;
    border-radius: 3px;
    background: rgba(0, 0, 0, .8);
    background-color: #333;
    text-shadow: none;

    font-smoothing: subpixel-antialiased;
}

.tooltip:before
{
    position: absolute;
    z-index: 10000;

    display: none;

    width: 0;
    height: 0;

    content: '';

    opacity: 0;
    color: #333;
    color: rgba(0, 0, 0, .8);
    border: 5px solid transparent;
}

.tooltip:hover:before,
.tooltip:hover:after,
.tooltip:active:before,
.tooltip:active:after,
.tooltip:focus:before,
.tooltip:focus:after
{
    display: inline-block;

    -webkit-animation-name: fadein;
            animation-name: fadein;
    -webkit-animation-duration: .4s;
            animation-duration: .4s;
    text-decoration: none;

    opacity: 1;
}

/* tooltip position */

.tooltip.bottom:after,
.tooltip.bottom-right:after,
.tooltip.bottom-left:after
{
    top: 100%;
    right: 50%;

    margin-top: 4px;
}

.tooltip.bottom:before,
.tooltip.bottom-left:before,
.tooltip.bottom-right:before
{
    top: auto;
    right: 50%;
    bottom: -4px;

    margin-right: -5px;

    border-bottom-color: rgba(0, 0, 0, .8);
}

.tooltip.bottom:after
{
    right: 0;
    left: 0;
}

.tooltip.bottom-right:after
{
    right: auto;
    left: 50%;

    margin-left: -15px;
}

.tooltip.bottom-left:after
{
    margin-right:...