/*
App reset by Ben Frain @benfrain / benfrain.com

Latest: https://github.com/benfrain/app-reset

An opinionated set of resets suitable for building web applications.

## Accessibility Notes
These resets target HTML elements that typically receive styling defaults by User Agents that I always need to 'undo'.

Be aware that some of these resets have a negative impact on the default usability and accessibility of a web page. Therefore, ensure you add an equivalent accessible style back that matches your project aesthetic.

## You'll want to run this through Autoprefixer You'll typically need to run this through (https://github.com/postcss/autoprefixer) for production. Only essential prefixes are added here (e.g. proprietary property value/pairs) and you'll need to set prefixing relative to your desired browser support matrix.

*/

/*Hat tip to @thierrykoblentz for this approach: https://css-tricks.com/inheriting-box-sizing-probably-slightly-better-best-practice/ */
html {
    box-sizing: border-box;
    /* Nicer looking fonts for OS X and iOS */
    -webkit-font-smoothing: antialiased;
}

/*Yes, the universal selector. No, it isn't slow: https://benfrain.com/css-performance-revisited-selectors-bloat-expensive-styles/*/
* {
    /* Later browsers can be more easily reset with `all: unset`. It's commented out by default here as it's pretty heavy handed. However, further declarations on these elements follow for older browsers. If you uncomment this property/value REMEMBER accessibility for outlines etc. This undoes a LOT of default UA styling, use with EXTREME caution!! */
    /* all: unset; */
    /*This prevents users being able to select text. Stops long presses in iOS bringing up copy/paste UI for example. Note below we specifically switch user-select on for inputs for the sake of Safari. Bug here: https://bugs.webkit.org/show_bug.cgi?id=82692*/
    user-select: none;
    /*This gets -webkit specific prefix as it is a non W3C property*/
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
    /*Older Androids need this instead*/
    -webkit-tap-highlight-color: transparent;
    /* Most devs find border-box easier to reason about. However by inheriting we can mix box-sizing approaches.*/
    box-sizing: inherit;
}

*:before,
*:after {
    box-sizing: inherit;
}

/* Switching user-select on for inputs and contenteditable specifically for Safari (see bug link above)*/
input[type],
[contenteditable] {
    user-select: text;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p {
    /*We will be adding our own margin to these elements as needed.*/
    margin: 0;
    /*You'll want to set font-size as needed.*/
    font-size: 1rem;
    /*No bold for h tags unless you want it*/
    font-weight: 400;
}

/* 
Thanks to L. David Baron for this:
https://twitter.com/davidbaron/status/794138427952222210 */
base,
basefont,
datalist,
head,
meta,
script,
style,
title,
noembed,
param,
template {
    display: none;
}

a {
    text-decoration: none;
    color: inherit;
}

/*No bold for b tags by default*/
b {
    font-weight: 400;
}

/*Prevent these elements having italics by default*/
em,
i {
    font-style: normal;
}

/*IMPORTANT: This removes the focus outline for most browsers. Be aware this is a backwards accessibilty step! Mozilla (i.e. Firefox) also adds a dotted outline around a tags and buttons when they receive tab focus which I haven't found an unhacky way of removing.*/
a:focus,
button:focus {
    outline: 0;
}

/* The button element tends to get a lot of default styles which we largely undo here. We set text-alignment (usually set to center by UA style sheet) and the font-family to inherit from your own styles instead. */
button {
    appearance: none;
    background-color: transparent;
    border: 0;
    padding: 0;
    text-align: inherit;
    font-family: inherit;
}

input,
fieldset {
    appearance: none;
    border: 0;
    padding: 0;
    margin: 0;
    /*inputs and fieldset defaults to having a min-width equal to its content in Chrome and Firefox (https://code.google.com/p/chromium/issues/detail?id=560762), we may not want that*/
    min-width: 0;
    /*Reset the font size and family*/
    font-size: 1rem;
    font-family: inherit;
}

/* For IE, we want to remove the default cross ('X') that appears in input fields when a user starts typing - Make sure you add your own! */
input::-ms-clear {
    display: none;
}

/*This switches the default outline off when an input receives focus (really important for users tabbing through with a keyboard) so ensure you put something decent in for your input focus instead!!*/
input:focus {
    outline: 0;
}

input[type="number"] {
    /*Mozilla shows the spinner UI on number inputs unless we use this:*/
    -moz-appearance: textfield;
}

/*Removes the little spinner controls for number type inputs (WebKit browsers/forks only)*/
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    appearance: none;
}

/*SVG defaults to display: inline which I dislike. Inline-block or inline-flex will render white space on SVG elements in HTML (where you would have defs and symbols) if the container isn't a flex box or the font-size set to 0 to crush the whitespace */
svg {
    display: block;
}

img {
    /*Make images behave responsively. Here they will scale up to 100% of their natural size*/
    max-width: 100%;
    /*Make images display as a block (UA default is usually inline)*/
    display: block;
}

/*Removes the default focusring that Mozilla places on select items. From: http://stackoverflow.com/a/18853002/1147859 
Ensure you set `#000` to the colour you want your text to appear */
select:-moz-focusring {
    color: transparent;
    text-shadow: 0 0 0 #000;
}

/* Switching on box-sizing: border-box by default; toggle this off if you want more granular control */
body {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
	margin: 50vh 0;
	background-color: #494949;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Tahoma, Roboto, Oxygen, Ubuntu,
        Cantarell, "Fira Sans", "Open Sans", sans-serif;
}


/* Styles relevant to this technique */

.btn-Group {
    max-width: 500px;
    margin: 20vh auto;
    font-size: 0;
    display: flex;
    flex-direction: column;
    background-color: #454545;
}

.btn-Group_Header {
    font-size: 1.3rem;
    color: #ddd;
    background-color: #444;
    padding: 10px;
}

.btn-Btn {
    display: inline-flex;
    padding: 0 10px;
    min-height: 80px;
    align-items: center;
    justify-content: start;
    position: relative;
    z-index: 1;
    margin: 0;
    overflow: hidden;
    transition: all 0.1s;
    background-color: #505050;
}
.btn-Btn:nth-of-type(1) {
    width: 25%;
}
.btn-Btn:nth-of-type(2) {
    width: 50%;
}
.btn-Btn:nth-of-type(3) {
    width: 100%;
}

.btn-Btn:before {
    content: "";
    position: absolute;
    top: calc(var(--y) - var(--width) / 2);
    left: calc(var(--x) - var(--width) / 2);
    transform-origin: 50% 50%;
    background-color: #d2d2d2;
    
    height: var(--width);
    width: var(--width);
    border-radius: 50%;
    z-index: -1;
    transform: scale(0);
    opacity: 0;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn-Group-circle .btn-Btn[aria-selected="true"]:before {
    transform: none;
    opacity: 1;
    transition: transform 0.2s ease, opacity 0.1s ease;
}


.btn-Btn_Name {
    font-size: 1.1rem;
    color: #d2d2d2;
    margin: 0 5px;
    transition: color 0.1s;
}

[aria-selected="true"] .btn-Btn_Name {
    color: #555;
}

.btn-Btn_B {
    font-size: 1.1rem;
    color: #f90;
    transition: color 0.1s;
}

[aria-selected="true"] .btn-Btn_B {
    color: #5948db;
}