Creating a switch toggle with a "yes" "no" that appears inside - html

Question

How do I create a switch toggle input where a "Y" and "N" appears 'above' the input?
In the snippet below, I have a problem where the z-index of the "Y" and "N" covers the input so it is only toggle-able if you click around the z-indexed spans.
Additionally, I would like the letters to change color when the checkbox is toggled, but that is a secondary issue, I think.
body, html {
box-sizing: border-box;
}
*, *:before, *:after {
box-sizing: inherit;
}
.switch__input {
position: absolute;
top: 0;
left: 0;
width: 90px;
height: 50px;
opacity: 0;
z-index: 0;
}
.switch__label:before {
content: '';
text-align: center;
position: absolute;
color: red;
top: 5px;
left: 0;
width: 90px;
height: 35px;
background-color: rgba(0, 0, 0, 0.26);
border-radius: 100px;
z-index: 0;
-webkit-transition: background-color 0.28s cubic-bezier(0.4, 0, 0.2, 1);
transition: background-color 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
.switch__label:after {
content: '';
color: white;
position: absolute;
text-align: center;
font-size: 24px;
padding: 4.4px 0;
top: -2px;
left: 0;
width: 50px;
height: 50px;
background-color: #2d95e5;
border-radius: 100px;
box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 1px 5px 0 rgba(0, 0, 0, 0.12);
z-index: 0;
-webkit-transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
-webkit-transition-property: left, background-color;
transition-property: left, background-color;
}
.switch__input:checked + .switch__label:before {
background-color: rgba(225, 225, 225, 0.5);
}
.switch__input:checked + .switch__label:after {
left: 40px;
content: '';
color: white;
background-color: #BFBFBF;
}
.yesnocontainer {
font-family: sans-serif;
display: flex;
width: 70px;
justify-content: space-evenly;
align-content: center;
}
.yes, .no {
font-size: 24px;
}
.yes {
position: relative;
color: black !important;
z-index: 999 !important;
}
.no {
position: relative;
color: black !important;
z-index: 999 !important;
}
<div class="switch">
<input type="checkbox" id="switch1" class="switch__input" checked>
<label for="switch1" class="switch__label"></label>
<span class="yesnocontainer">
<span class="yes">Y</span>
<span class="no">N</span>
</span>
</div>

Answer 1

.switch-toggle {
float: left;
background: gray;
}
.switch-toggle input {
position: absolute;
opacity: 0;
}
.switch-toggle input + label {
padding: 7px;
float:left;
color: #fff;
cursor: pointer;
}
.switch-toggle input:checked + .red {
background: red;
}
.switch-toggle input:checked + .green {
background: green;
}
<div class="switch-toggle switch-3 switch-candy">
<input id="on" name="state-d" class="green" type="radio" />
<label for="on" class="green" onclick="">ON</label>
<input id="off" name="state-d" class="red" type="radio" />
<label for="off" class="red" onclick="">OFF</label>
</div>

Answer 2

.switch__label must be visibled on screen, try this.
body, html {
box-sizing: border-box;
}
*, *:before, *:after {
box-sizing: inherit;
}
/* ADD .switch__label */
.switch__input,.switch__label {
position: absolute;
top: 0;
left: 0;
width: 90px;
height: 50px;
opacity: 0;
z-index: 0;
}
/*ADD*/
.switch__label{
z-index:2;
opacity:1;
}
.switch__label:before {
content: '';
text-align: center;
position: absolute;
color: red;
top: 5px;
left: 0;
width: 90px;
height: 35px;
background-color: rgba(0, 0, 0, 0.26);
border-radius: 100px;
z-index: 0;
-webkit-transition: background-color 0.28s cubic-bezier(0.4, 0, 0.2, 1);
transition: background-color 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
.switch__label:after {
content: '';
color: white;
position: absolute;
text-align: center;
font-size: 24px;
padding: 4.4px 0;
top: -2px;
left: 0;
width: 50px;
height: 50px;
background-color: #2d95e5;
border-radius: 100px;
box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 1px 5px 0 rgba(0, 0, 0, 0.12);
z-index: 0;
-webkit-transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
-webkit-transition-property: left, background-color;
transition-property: left, background-color;
}
.switch__input:checked + .switch__label:before {
background-color: rgba(225, 225, 225, 0.5);
}
.switch__input:checked + .switch__label:after {
left: 40px;
content: '';
color: white;
background-color: #BFBFBF;
}
.yesnocontainer {
font-family: sans-serif;
display: flex;
width: 70px;
justify-content: space-evenly;
align-content: center;
}
.yes, .no {
font-size: 24px;
}
.yes {
position: relative;
color: black !important;
z-index: 1;
}
/* ADD */
.switch__input:checked + .switch__label + .yesnocontainer > .no {
z-index:3;
}
.no {
position: relative;
color: black !important;
z-index: 1;
}
/* ADD */
.switch__input:not(:checked) + .switch__label + .yesnocontainer > .yes {
z-index:3;
}
<div class="switch">
<input type="checkbox" id="switch1" class="switch__input" checked>
<label for="switch1" class="switch__label"></label>
<span class="yesnocontainer">
<span class="yes">Y</span>
<span class="no">N</span>
</span>
</div>