OUTPUT
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Light Bulb On/off (rsportflio)</title>
<style>
body {
background: #111;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
#switch {
display: none;
}
.bulb {
width: 150px;
height: 150px;
background-color: #333;
border-radius: 50%;
position: relative;
box-shadow: inset 0 0 20px #000;
transition: 0.3s;
cursor: pointer;
}
.bulb::after {
content: "";
width: 40px;
height: 25px;
background-color: #555;
position: absolute;
bottom: -25px;
left: 50%;
transform: translateX(-50%);
border-radius: 0 0 5px 5px;
}
#switch:checked + .bulb {
background-color: #fff;
box-shadow: 0 0 40px #fff, 0 0 80px red;
}
</style>
</head>
<body>
<label>
<input type="checkbox" id="switch" />
<div class="bulb"></div>
</label>
</body>
</html>