index.css

/* The icon */
.help-tip{
    position: relative;
    text-align: center;
    border: 2px solid #444;
    border-radius: 50%;
    width: 15px;
    height: 15px;
    font-size: 15px;
    line-height: 15px;
    cursor: default;
    margin-left: 5px;
}

.help-tip:before{
    content:'?';
    font-family: sans-serif;
    font-weight: normal;
    color:#444;
}

.help-tip:hover p{
    display:block;
    transform-origin: 100% 0%;
    -webkit-animation: fadeIn 0.3s ease;
    animation: fadeIn 0.3s ease;
}

/* The tooltip */
.help-tip p {    
    display: none;
    font-family: sans-serif;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    text-align: center;
    background-color: #FFFFFF;
    padding: 12px 16px;
    width: 178px;
    height: auto;
    position: absolute;
    left: 50%;
    transform: translate(-50%, 5%);
    border-radius: 3px;
/* 	border: 1px solid #E0E0E0; */
    box-shadow: 0 0px 20px 0 rgba(0,0,0,0.1);
    color: #37393D;
    font-size: 12px;
    line-height: 18px;
    z-index: 99;
}

.help-tip p a {
    color: #067df7;
    text-decoration: none;
}

.help-tip p a:hover {
    text-decoration: underline;
}

/* The pointer of the tooltip */
.help-tip p:before { 
    position: absolute;
    content: '';
    width: 0;
    height: 0;
    border: 10px solid transparent;
    border-bottom-color:#FFFFFF;
    top: -9px;
    left: 50%;
    transform: translate(-50%, -50%);
}

    /* Prevents the tooltip from being hidden */
.help-tip p:after {
    width: 10px;
    height: 40px;
    content:'';
    position: absolute;
    top: -40px;
    left: 0;
}

/* CSS animation */
@-webkit-keyframes fadeIn {
    0% { opacity:0; }
    100% { opacity:100%; }
}

@keyframes fadeIn {
    0% { opacity:0; }
    100% { opacity:100%; }
}