<!DOCTYPE html>
<html>
<head>
<style>
.main {
display: block;
position: relative;
padding-left: 45px;
margin-bottom: 15px;
cursor: pointer;
font-size: 20px;
}
input[type=checkbox] {
visibility: hidden;
}
.geekmark {
position: absolute;
top: 0;
left: 0;
height: 25px;
width: 25px;
background-color: black;
}
.main:hover input ~ .geekmark {
background-color: yellow;
}
.main input:active ~ .geekmark {
background-color: red;
}
.main input:checked ~ .geekmark {
background-color: green;
}
.geekmark:after {
content: "";
position: absolute;
display: none;
}
.main input:checked ~ .geekmark:after {
display: block;
}
.main .geekmark:after {
left: 8px;
bottom: 5px;
width: 6px;
height: 12px;
border: solid white;
border-width: 0 4px 4px 0;
-webkit-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
}
</style>
</head>
<body>
<h1 style="color:green;">
Best Computer Science Platform
</h1>
<label class="main">CodeX
<input type="checkbox">
<span class="geekmark"></span>
</label>
<label class="main">GeeksforGeeks
<input type="checkbox" checked="checked">
<span class="geekmark"></span>
</label>
<label class="main">CodeY
<input type="checkbox">
<span class="geekmark"></span>
</label>
</body>
</html>