<div class="wrap"> 
    <h1>Pure CSS Tooltips</h1> 
    <p>To create a tooltip just add the <span class="tool" data-tip="By adding this class you can provide almost any element with a tool tip." tabindex="1">tool</span> class and the <span class="tool" data-tip="Use this data-tip attribute to store your tool tip message." tabindex="2">data-tip</span> attribute with your tooltip message.</p>
    <pre>&lt;span class="tool" data-tip="content..."&gt;</pre>
</div>        

@import url(https://fonts.googleapis.com/css?family=Audiowide);
html {
    box-sizing: border-box;
    font-family: Arial, sans-serif;
    font-size: 16px;
    font-weight: normal;
    line-height: 1.4;
}

*,
*:before,
*:after {
    box-sizing: inherit;
}

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
    width: 100%;
}

span {
    color: #e91e63;
    font-family: monospace;
    white-space: nowrap;
}

span:after {
    font-family: Arial, sans-serif;
    text-align: left;
    white-space: normal;
}

span:focus {
    outline: none;
}

.wrap {
    background: #ECF0F1;
    color: #607D8B;
    height: 100%;
    overflow: auto;
    padding: 1em 2.5em;
    text-align: center;
    width: 100%;
}

h1 {
    color: #e91e63;
    font-family: "Audiowide", cursive;
    font-size: 2em;
    font-size: 7vw;
    font-weight: bold;
    line-height: 1.2;
    margin: 0.5em 0 2.5em;
    text-shadow: 1px 1px 1px #fefefe;
}

@media (min-width: 1075px) {
    h1 {
        font-size: 4.7em;
    }
}

pre {
    background: #fff;
    display: inline-block;
    font-size: .55em;
    margin-top: 2em;
    padding: 1em;
}

@media (min-width: 360px) {
    pre {
        font-size: .7em;
    }
}

@media (min-width: 500px) {
    pre {
        font-size: 1em;
    }
}
/*== start of code for tooltips ==*/
.tool {
    cursor: help;
    position: relative;
}


/*== common styles for both parts of tool tip ==*/
.tool::before,
.tool::after {
    left: 50%;
    opacity: 0;
    position: absolute;
    z-index: -100;
}

.tool:hover::before,
.tool:focus::before,
.tool:hover::after,
.tool:focus::after {
    opacity: 1;
    transform: scale(1) translateY(0);
    z-index: 100; 
}


/*== pointer tip ==*/
.tool::before {
    border-style: solid;
    border-width: 1em 0.75em 0 0.75em;
    border-color: #3E474F transparent transparent transparent;
    bottom: 100%;
    content: "";
    margin-left: -0.5em;
    transition: all .65s cubic-bezier(.84,-0.18,.31,1.26), opacity .65s .5s;
    transform:  scale(.6) translateY(-90%);
} 

.tool:hover::before,
.tool:focus::before {
    transition: all .65s cubic-bezier(.84,-0.18,.31,1.26) .2s;
}


/*== speech bubble ==*/
.tool::after {
    background: #3E474F;
    border-radius: .25em;
    bottom: 178%;
    color: #EDEFF0;
    content: attr(data-tip);
    line-height: 1.2;
    margin-left: -8.75em;
    padding: 1em;
    transition: all .65s cubic-bezier(.84,-0.18,.31,1.26) .2s;
    transform:  scale(.6) translateY(50%);  
    width: 17.5em;
}

.tool:hover::after,
.tool:focus::after  {
    transition: all .65s cubic-bezier(.84,-0.18,.31,1.26);
}

@media (max-width: 760px) {
  .tool::after { 
        font-size: .75em;
        margin-left: -5em;
        width: 10em; 
  }
}

//No JS required