<!-- this script is provided by http://www.htmlfreecode.com coded by: Kerixa Inc. -->
<style>
/** For prettyiness **/
 body {
     font-family: sans-serif;
     margin-top: 50px;
}
/** vars **/
 :root {
     --padding: 2px;
     --radius: 5px;
     --height: 20px;
     --width: 100px;
     --on-color-bg: #22dd55;
     --off-color-bg: lightgray;
     --on-color-fg: dimgrey;
     --off-color-fg: var(--on-color-fg);
}
/** Main slider CSS **/
 .slider-checkbox {
     position: relative;
     width: 50%;
     margin: 0 auto 0.5rem auto;
}
 @media only screen and (max-width: 800px) {
     .slider-checkbox {
         flex-direction: row;
         width: 90%;
    }
}
 .slider-checkbox input {
     display: none;
}
 .slider-checkbox input:checked + label:after {
     left: calc(50% + calc(var(--width) / 2));
     background: var(--on-color-fg);
}
 .slider-checkbox input:checked + label:before {
     background: var(--on-color-bg);
}
 .slider-checkbox label {
     cursor: pointer;
}
 .slider-checkbox label:hover {
     color: #888;
}
 .slider-checkbox label:before, .slider-checkbox label:after {
     position: absolute;
     display: inline-block;
     content: "";
     left: calc(50% - var(--padding));
     border-radius: var(--radius);
}
 .slider-checkbox label:before {
     background: var(--off-color-bg);
     width: var(--width);
     z-index: 1;
     height: var(--height);
     transition: all 250ms;
}
 .slider-checkbox label:after {
     width: calc(var(--width) /2 - var(--padding) *2);
     background: var(--off-color-fg);
     z-index: 2;
     transition: all 200ms;
     height: calc(var(--height) - var(--padding) * 2);
     top: var(--padding);
     left: calc(50% + var(--padding));
}

</style>
<div class="slider-checkbox">
    <input id="option-1" type="radio" value="1" name="options">
    <label for="option-1">
        First option
    </label>
</div>
<div class="slider-checkbox">
    <input id="option-2" type="radio" value="1" name="options">
    <label for="option-2">
        Second option
    </label>
</div>
<div class="slider-checkbox">
    <input id="option-3" type="radio" value="1" name="options">
    <label for="option-3">
        Third option
    </label>
</div>
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