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How to create custom checkbox and radio inputs with CSS

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One major thing I forgot to outline in the screencast is ensuring there is a focused state applied to the custom indicator when the user has focused the input. The code provided below includes a focus state.

<!-- checkbox -->
<label class="control">
<input type="checkbox" class="control__input visually-hidden">
<span class="control__indicator"></span>
Blue
</label>
<!-- radio -->
<label class="control">
<input type="radio" name="color" class="control__input visually-hidden">
<span class="control__indicator control__indicator--radio"></span>
Blue
</label>
.control {
display: inline-flex;
align-items: center;
}
.control__indicator {
margin-right: .25rem;
width: .75rem;
height: .75rem;
background-color: #ccc;
border-radius: 3px;
}
.control__indicator--radio {
border-radius: 50%;
}
.control__input:focus ~ .control__indicator {
box-shadow: 0 0 0 0.2rem rgba(38,143,255,.5);
}
.control__input:checked ~ .control__indicator {
background-color: #05f;
background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNCIgaGVpZ2h0PSIyNCIgdmlld0JveD0iMCAwIDI0IDI0Ij4gIDxwYXRoIGQ9Ik0wIDBoMjR2MjRIMHoiIGZpbGw9Im5vbmUiLz4gIDxwYXRoIGZpbGw9IiNmZmYiIGQ9Ik0xOCA3bC0xLjQxLTEuNDEtNi4zNCA2LjM0IDEuNDEgMS40MUwxOCA3em00LjI0LTEuNDFMMTEuNjYgMTYuMTcgNy40OCAxMmwtMS40MSAxLjQxTDExLjY2IDE5bDEyLTEyLTEuNDItMS40MXpNLjQxIDEzLjQxTDYgMTlsMS40MS0xLjQxTDEuODMgMTIgLjQxIDEzLjQxeiIvPjwvc3ZnPg==');
background-size: 80%;
background-position: center;
background-repeat: no-repeat;
}
/* Visually hide the browser input to ensure it is still focusable via keyboards */
.visually-hidden {
border: 0;
clip: rect(0 0 0 0);
height: 1px;
margin: -1px;
overflow: hidden;
padding: 0;
position: absolute;
width: 1px;
}

Here's a demo on CodePen that you can play with.