demo.css

/**
 * Tooltip.js is a lightweight javascript plugin for responsive and
 * easy to use tooltips.
 *
 * Demo stylesheet, not needed for production
 *
 * @version   1.0
 * @author    Jakob Ploens <jakob@2helden.com>
 * @copyright Jakob Ploens 2016
 * @license   The MIT License
 */

* {
    margin:     0;
    padding:    0;
    box-sizing: border-box;
    position:   relative;
}

html {
    background: #efefef;
}

body {
    color: #111;
    font-size: 1em;
    font-family: 'Roboto', sans-serif;
    line-height: 1.8;

    padding: 3em;
    max-width: 60rem;
}

p {
    margin-top: 1.8rem;
    margin-bottom: 1.8rem;
}

h1 {
    font-size: 1.5em;
    font-weight: bold;
    margin-bottom: 1.8rem;
}

.trigger {
    /*display:       inline-block;*/
    /*padding:       0 .5em;*/
    /*background:    #fff;*/
    /*border-radius: 2px;*/
    border-bottom: 2px solid olive;
    color: olive;
}