JSFiddle - React, Tailwind, and code Playground

by aldomatic

HTML

<p>Check Me: <input type="checkbox" name="boxy" value="" /></p>

CSS

body{background-color:#f2f2f2;}
p{
    font-family:arial;
    font-size:12px;
    padding:15px;
}
input[type=checkbox] {
    font-size: 16px;
    -webkit-appearance: none;  
    position: relative;
    border: 1px solid #5b5b5b;
    display: inline-block;
    line-height: 1em;
    margin: 0;
    padding: 0 0 0 5px;
    width: 1em;
    height: 1em;
    vertical-align: text-top;
    background: -webkit-linear-gradient(top, rgba(255,255,255,0.8), rgba(255,255,255,0.1)
  );
}
input[type=checkbox]:checked::after {
    position: absolute;
    content: '';
    left: 15%;
    top: -10%;
    height: 40%;
    width: 100%;
    border-bottom: 2px solid red;
    border-left: 2px solid red;
    -webkit-transform: rotate(-45deg);
}