/*
	get rid of the fieldset styling and keep
	this all on a single line
*/
.radio-switch {
	border: none;
	margin-bottom: 2em; /* demo value */
	padding: 0;
	white-space: nowrap;
}

/**
 * Inner wrapper to set a position relative for the inputs
 * that need to be position absolute.
 * display inline-block kees the wrapper only as wide
 * as the radio switch within.
 */
.radio-switch__inner {
	display: inline-block;
	position: relative;
}

/*
	radio button groups often benefit from a legend to
	provide context as to what the different
	options pertain to. Ideally this would be visible to all
	users, but you know...
*/
.radio-switch--hide-legend legend {
	font-size: 2px;
	opacity: 0;
	position: absolute;
}

/*
	relative labels to help position the pseudo elements
	the z-index will be handy later, when the labels that
	overlap the visual switch UI need to be adjusted
	to allow for a user to toggle the switch without
	having to move their mouse/finger to the different
	sides of the UI
*/
.radio-switch label {
	display: inline-block;
	line-height: 2;
	position: relative;
	z-index: 2;
}

/*
	inputs set to opcacity 0 are still accessible.
	Apparently there can be issues targetting inputs with
	Dragon speech recognition software if you use the typical
	'visually-hidden' class...so might as well just avoid that issue...
*/
.radio-switch input {
	-moz-appearance: none;
	-webkit-appearance: none;
	appearance: none;
	background: none;
	height: 100%;
	opacity: .00001;
	position: absolute;
	top: 0;
	width: 30%;
	z-index: 3;
}

.radio-switch input:first-of-type {
	left: 0;
}

.radio-switch input:last-of-type {
	right: 0;
}

.radio-switch input:not(:checked):hover + label {
	text-decoration: underline;
}

/*
	a 2 option toggle can only have 2 options...so instead of
	adding more classes, i'm just going to use some
	structural pseudo-classes to target them...
	cause why let all that good work go to waste?!

  the large padding is used to position the labels
  on top of the visual UI, so the switch UI itself
  can be mouse clicked or finger tapped to toggle
  the current option
*/
.radio-switch label:first-of-type {
	padding-right: 5em;
}

.radio-switch label:last-child {
	margin-left: -4.25em;
	padding-left: 5em;
}

/*
	oh focus within, I can't wait for you to have even more support.
	But you'll never be in IE11, so we're going to need a
	polyfill for you for a bit...
 */
.radio-switch:focus-within label:first-of-type:after {
	box-shadow: 0 0 0 2px #fff, 0 0 0 4px #2196f3;
}

/* polyfill class*/
.radio-switch.focus-within label:first-of-type:after {
	box-shadow: 0 0 0 2px #fff, 0 0 0 4px #2196f3;
}

/* making the switch UI.  */
.radio-switch label:first-of-type:before,
.radio-switch label:first-of-type:after {
	border: 1px solid #aaa;
	content: "";
	height: 2em;
	overflow: hidden;
	pointer-events: none;
	position: absolute;
	vertical-align: middle;
}

.radio-switch label:first-of-type:before {
	background: #fff;
	border: 1px solid #aaa;
	border-radius: 100%;
	position: absolute;
	right: 0;
	transition: right .2s ease-in-out;
	width: 2em;
	z-index: 2;
}

/* IE11 has some weirdness in how it's calculating the right positioning
   of the switch knob.  this hacky workaround is fitting for the hacky browser :) */
_:-ms-fullscreen, :root .radio-switch label:first-of-type:before {
	right: -.2em;
}

.radio-switch label:first-of-type:after {
	background: #222;
	border-radius: 1em;
	margin: 0 1em;
	transition: background .2s ease-in-out;
	width: 4em;
}

/*
	Visually change the switch UI to match the
	checked state of the first radio button
*/
.radio-switch input:first-of-type:checked ~ label:first-of-type:after {
	background: #2196f3;
}

.radio-switch input:first-of-type:checked ~ label:first-of-type:before {
	right: 2em;
}

/* IE11 hack for correct positioning */
_:-ms-fullscreen, :root .radio-switch input:first-of-type:checked ~ label:first-of-type:before {
	right: 1.8em;
}

/* Move the 2nd label to have a lower z-index, so when that
   option is toggled, the first label will overlay on top of the
   Switch ui, and the switch can be pressed again to toggle back
   to the prevoius state. */
.radio-switch input:last-of-type:checked ~ label:last-of-type {
	z-index: 1;
}


/* 'color in' the switch knob in high contrast mode by giving it
   a large border */
@media screen and (-ms-high-contrast: active) {
	.radio-switch label:first-of-type:before {
		background-color: windowText;
		border: 1em solid transparent;
		/* firefox doesn't respect the bg color,
		   so the border fills the knob */
	}

	.radio-switch:focus-within label:first-of-type:after {
		outline: 2px solid;
		outline-offset: 3px;
	}

	/* polyfill class*/
	.radio-switch.focus-within label:first-of-type:after {
		outline: 2px solid;
		outline-offset: 3px;
	}
}