Checkbox checked CSS

Hi everyone i am trying to make a checkbox using CSS.

I have created this DEMO from codepen.io

In this demo you can see there is a tree checkbox button (YES,NO,MAYBE)

My question is this: Let's say the user first clicked the button YES.The user then gave up and click on the NO button. I want to make it when user clicked NO button then Yes button automatically unchecked. How can i do that anyone can help me ?

HTML

<div class="container">
  <input type="checkbox" class="yesno"/>Yes
  <input type="checkbox" class="yesno"/>no
  <input type="checkbox" class="yesno"/>maybe
</div>

CSS

.container {
  margin: 50px;
}
.yesno {
  -webkit-appearance: none;
  -moz-appearance: none;
  width: 30px;
  height: 20px;
  border-radius: 14px;
  outline: 0;
  background: #9da6b0;
  -webkit-transition: all 0.15s ease-in-out;
  cursor: pointer;
}
.yesno:after {
  content: "";
  display: block;
  width: 14px;
  height: 14px;
  background: #fff;
  border-radius: 11px;
  position: relative;
  top: 3px;
  left: 3px;
  -webkit-transition: all 0.15s ease-in-out;
}
.yesno:checked {
  background: #529ecc;
}
.yesno:checked:after {
  left: 13px;
}