mint/app/guide/guide.css

guide{
    position: relative;
    display:inline-block;
    width:14px;
    height:14px;
    cursor: pointer;
    background: url(guide_icon.svg);
    background-repeat: no-repeat;
    background-size: contain;
    margin: 0 6px;
}
guide:hover  .guide_contence{
    display:inline-block;
}
.guide_contence {
    position: absolute;
    top:100%;
    width:18em;
    min-height:30em;
    padding:10px;
    background-color:white;
    box-shadow: 0 0 10px rgba(0,0,0,0.15);
    font-size:10pt;
    text-align:left;
    display:none;
}

.guide_contence  h1{
    font-size:1.5em;
    font-weight:700;
}
.guide_contence  h2{
    font-size:1.3em;
    font-weight:700;
}
.guide_contence  h3{
    font-size:1.1em;
    font-weight:700;
}
.guide_contence  h4{
    font-size:1em;
    font-weight:700;
}
.guide_contence  li{
    display: contents;
}