CSS Tooltip/Hover-not working-please help

1

Trying to create a tooltip for “first name, last name” text- you’ll see by code what I’m trying to do… please tell me what I’m doing wrong or where there’s an error.

CSS

.tooltip {
	font-size: 100px;
	width: 300px;
	height: 250px;
	padding-left: 350px;
	padding-right: 350px;
	padding-top: 200px;
	padding-bottom: 200px;
	margin: auto;
	background-color: darkmagenta;
	color: antiquewhite;
	font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
	position: relative;
	display: inline-block;
	border-bottom: 1px dotted black;
	
}

.tooltip .tooltiptext {
	visibility: hidden;
	width: 120px;
	background-color: black;
	color: white;
	text-align: center;
	border-radius: 6px;
	padding: 5px 0;
	position: absolute;
	z-index: 1;
	bottom: 150%;
	left: 50%;
	margin-left: -60px;
}

.tooltip .tooltiptext::after {
	content: "";
	position: absolute;
	top: 100%;
	left: 50%;
	margin-left: -5px;
	border-width: 5px;
    border-style: solid;
    border-color: black transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
	visibility: visible;

HTML
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Portfolio</title>
<link href="porfolio.JLC.css" rel="stylesheet" type="text/css">
</head>

<body>
	<div class="tooltip">First Name,Last Name
  <span class="tooltiptext">I'm a front end developer!</span>
</div>
	
</body>
</html>
2

Hello ,
I hope that this source code , help you build your tooltip.

<!doctype html>
<html>

<head>
    <meta charset="UTF-8">
    <title>Portfolio</title>
    <style>
        .tooltip {
            font-size: 100px;
            width: 300px;
            height: 250px;
            padding-left: 350px;
            padding-right: 350px;
            padding-top: 200px;
            padding-bottom: 200px;
            margin: auto;
            background-color: darkmagenta;
            color: antiquewhite;
            font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted black;

        }

        .tooltip .tooltiptext {
            visibility: hidden;
            /*width: 120px;*/
            background-color: black;
            color: white;
            text-align: center;
            border-radius: 6px;
            /*padding: 5px 0;*/
            position: absolute;
            z-index: 1;
            /*bottom: 150%;
	left: 50%;
	margin-left: -60px;*/
        }

        .tooltip .tooltiptext::after {
            content: "";
            position: absolute;
            top: 100%;
            left: 50%;
            margin-left: -5px;
            border-width: 5px;
            border-style: solid;
            border-color: black transparent transparent transparent;
        }

        .tooltip:hover .tooltiptext {
            visibility: visible;
        }
    </style>
</head>

<body>

    <div class="tooltip">
        First Name,Last Name <span class="tooltiptext">I'm a front end developer!</span>
    </div>

</body>

</html>