/* Document
 * ========================================================================== */
/**
 * Add border box sizing in all browsers (opinionated).
 */
*,
::before,
::after {
  box-sizing: border-box; }

/**
 * 1. Add text decoration inheritance in all browsers (opinionated).
 * 2. Add vertical alignment inheritance in all browsers (opinionated).
 */
::before,
::after {
  text-decoration: inherit;
  /* 1 */
  vertical-align: inherit;
  /* 2 */ }

/**
 * 1. Use the default cursor in all browsers (opinionated).
 * 2. Change the line height in all browsers (opinionated).
 * 3. Use a 4-space tab width in all browsers (opinionated).
 * 4. Remove the grey highlight on links in iOS (opinionated).
 * 5. Prevent adjustments of font size after orientation changes in
 *    IE on Windows Phone and in iOS.
 * 6. Breaks words to prevent overflow in all browsers (opinionated).
 */
html {
  cursor: default;
  /* 1 */
  line-height: 1.5;
  /* 2 */
  -moz-tab-size: 4;
  /* 3 */
  -o-tab-size: 4;
     tab-size: 4;
  /* 3 */
  -webkit-tap-highlight-color: transparent;
  -ms-text-size-adjust: 100%;
  /* 5 */
  -webkit-text-size-adjust: 100%;
  /* 5 */
  word-break: break-word;
  /* 6 */ }

/* Sections
 * ========================================================================== */
/**
 * Remove the margin in all browsers (opinionated).
 */
body {
  margin: 0; }

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Edge, Firefox, and Safari.
 */
h1 {
  font-size: 2em;
  margin: 0.67em 0; }

/* Grouping content
 * ========================================================================== */
/**
 * Remove the margin on nested lists in Chrome, Edge, IE, and Safari.
 */
dl dl,
dl ol,
dl ul,
ol dl,
ul dl {
  margin: 0; }

/**
 * Remove the margin on nested lists in Edge 18- and IE.
 */
ol ol,
ol ul,
ul ol,
ul ul {
  margin: 0; }

/**
 * 1. Add the correct sizing in Firefox.
 * 2. Show the overflow in Edge 18- and IE.
 */
hr {
  height: 0;
  /* 1 */
  overflow: visible;
  /* 2 */ }

/**
 * Add the correct display in IE.
 */
main {
  display: block; }

/**
 * Remove the list style on navigation lists in all browsers (opinionated).
 */
nav ol,
nav ul {
  list-style: none;
  padding: 0; }

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
pre {
  font-family: monospace, monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */ }

/* Text-level semantics
 * ========================================================================== */
/**
 * Remove the gray background on active links in IE 10.
 */
a {
  background-color: transparent; }

/**
 * Add the correct text decoration in Edge 18-, IE, and Safari.
 */
abbr[title] {
  text-decoration: underline;
  -webkit-text-decoration: underline dotted;
          text-decoration: underline dotted; }

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */
b,
strong {
  font-weight: bolder; }

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
code,
kbd,
samp {
  font-family: monospace, monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */ }

/**
 * Add the correct font size in all browsers.
 */
small {
  font-size: 80%; }

/* Embedded content
 * ========================================================================== */
/*
 * Change the alignment on media elements in all browsers (opinionated).
 */
audio,
canvas,
iframe,
img,
svg,
video {
  vertical-align: middle; }

/**
 * Add the correct display in IE 9-.
 */
audio,
video {
  display: inline-block; }

/**
 * Add the correct display in iOS 4-7.
 */
audio:not([controls]) {
  display: none;
  height: 0; }

/**
 * Remove the border on iframes in all browsers (opinionated).
 */
iframe {
  border-style: none; }

/**
 * Remove the border on images within links in IE 10-.
 */
img {
  border-style: none; }

/**
 * Change the fill color to match the text color in all browsers (opinionated).
 */
svg:not([fill]) {
  fill: currentColor; }

/**
 * Hide the overflow in IE.
 */
svg:not(:root) {
  overflow: hidden; }

/* Tabular data
 * ========================================================================== */
/**
 * Collapse border spacing in all browsers (opinionated).
 */
table {
  border-collapse: collapse; }

/* Forms
 * ========================================================================== */
/**
 * Remove the margin on controls in Safari.
 */
button,
input,
select {
  margin: 0; }

/**
 * 1. Show the overflow in IE.
 * 2. Remove the inheritance of text transform in Edge 18-, Firefox, and IE.
 */
button {
  overflow: visible;
  /* 1 */
  text-transform: none;
  /* 2 */ }

/**
 * Correct the inability to style buttons in iOS and Safari.
 */
button,
[type="button"],
[type="reset"],
[type="submit"] {
  -webkit-appearance: button; }

/**
 * 1. Change the inconsistent appearance in all browsers (opinionated).
 * 2. Correct the padding in Firefox.
 */
fieldset {
  border: 1px solid #a0a0a0;
  /* 1 */
  padding: 0.35em 0.75em 0.625em;
  /* 2 */ }

/**
 * Show the overflow in Edge 18- and IE.
 */
input {
  overflow: visible; }

/**
 * 1. Correct the text wrapping in Edge 18- and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 */
legend {
  color: inherit;
  /* 2 */
  display: table;
  /* 1 */
  max-width: 100%;
  /* 1 */
  white-space: normal;
  /* 1 */ }

/**
 * 1. Add the correct display in Edge 18- and IE.
 * 2. Add the correct vertical alignment in Chrome, Edge, and Firefox.
 */
progress {
  display: inline-block;
  /* 1 */
  vertical-align: baseline;
  /* 2 */ }

/**
 * Remove the inheritance of text transform in Firefox.
 */
select {
  text-transform: none; }

/**
 * 1. Remove the margin in Firefox and Safari.
 * 2. Remove the default vertical scrollbar in IE.
 * 3. Change the resize direction in all browsers (opinionated).
 */
textarea {
  margin: 0;
  /* 1 */
  overflow: auto;
  /* 2 */
  resize: vertical;
  /* 3 */ }

/**
 * Remove the padding in IE 10-.
 */
[type="checkbox"],
[type="radio"] {
  padding: 0; }

/**
 * 1. Correct the odd appearance in Chrome, Edge, and Safari.
 * 2. Correct the outline style in Safari.
 */
[type="search"] {
  -webkit-appearance: textfield;
  /* 1 */
  outline-offset: -2px;
  /* 2 */ }

/**
 * Correct the cursor style of increment and decrement buttons in Safari.
 */
::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
  height: auto; }

/**
 * Correct the text style of placeholders in Chrome, Edge, and Safari.
 */
::-webkit-input-placeholder {
  color: inherit;
  opacity: 0.54; }

/**
 * Remove the inner padding in Chrome, Edge, and Safari on macOS.
 */
::-webkit-search-decoration {
  -webkit-appearance: none; }

/**
 * 1. Correct the inability to style upload buttons in iOS and Safari.
 * 2. Change font properties to `inherit` in Safari.
 */
::-webkit-file-upload-button {
  -webkit-appearance: button;
  /* 1 */
  font: inherit;
  /* 2 */ }

/**
 * Remove the inner border and padding of focus outlines in Firefox.
 */
::-moz-focus-inner {
  border-style: none;
  padding: 0; }

/**
 * Restore the focus outline styles unset by the previous rule in Firefox.
 */
:-moz-focusring {
  outline: 1px dotted ButtonText; }

/**
 * Remove the additional :invalid styles in Firefox.
 */
:-moz-ui-invalid {
  box-shadow: none; }

/* Interactive
 * ========================================================================== */
/*
 * Add the correct display in Edge 18- and IE.
 */
details {
  display: block; }

/*
 * Add the correct styles in Edge 18-, IE, and Safari.
 */
dialog {
  background-color: white;
  border: solid;
  color: black;
  display: block;
  height: -moz-fit-content;
  height: -webkit-fit-content;
  height: fit-content;
  left: 0;
  margin: auto;
  padding: 1em;
  position: absolute;
  right: 0;
  width: -moz-fit-content;
  width: -webkit-fit-content;
  width: fit-content; }

dialog:not([open]) {
  display: none; }

/*
 * Add the correct display in all browsers.
 */
summary {
  display: list-item; }

/* Scripting
 * ========================================================================== */
/**
 * Add the correct display in IE 9-.
 */
canvas {
  display: inline-block; }

/**
 * Add the correct display in IE.
 */
template {
  display: none; }

/* User interaction
 * ========================================================================== */
/*
 * 1. Remove the tapping delay in IE 10.
 * 2. Remove the tapping delay on clickable elements
      in all browsers (opinionated).
 */
a,
area,
button,
input,
label,
select,
summary,
textarea,
[tabindex] {
  /* 1 */
  touch-action: manipulation;
  /* 2 */ }

/**
 * Add the correct display in IE 10-.
 */
[hidden] {
  display: none; }

/* Accessibility
 * ========================================================================== */
/**
 * Change the cursor on busy elements in all browsers (opinionated).
 */
[aria-busy="true"] {
  cursor: progress; }

/*
 * Change the cursor on control elements in all browsers (opinionated).
 */
[aria-controls] {
  cursor: pointer; }

/*
 * Change the cursor on disabled, not-editable, or otherwise
 * inoperable elements in all browsers (opinionated).
 */
[aria-disabled="true"],
[disabled] {
  cursor: not-allowed; }

/*
 * Change the display on visually hidden accessible elements
 * in all browsers (opinionated).
 */
[aria-hidden="false"][hidden] {
  display: initial; }

[aria-hidden="false"][hidden]:not(:focus) {
  clip: rect(0, 0, 0, 0);
  position: absolute; }

.backButton, .congratulations__button, .levelSelectButton {
  padding: 0;
  margin: 0;
  border: none;
  border-radius: 0;
  background: none;
  -webkit-appearance: none;
  outline: none !important; }

body {
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  overflow: hidden;
  font-family: sans-serif; }

* {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-tap-highlight-color: transparent; }

.backButton {
  position: absolute;
  top: 10px;
  left: 10px;
  cursor: pointer; }
  .backButton:focus {
    outline: none; }
  .backButton__backImage {
    display: block; }

.congratulations {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #f00; }
  .congratulations--transparent {
    background: none; }
  .congratulations, .congratulations__fakeDevice {
    display: flex;
    align-items: center;
    justify-content: center; }
  .congratulations__fakeDevice {
    position: relative;
    width: 480px;
    height: 320px; }
  .congratulations__imageFrame, .congratulations__image {
    display: block; }
  .congratulations__imageFrame {
    position: relative;
    margin: 0;
    overflow: hidden;
    transform: translate3d(0, 0, 0); }
  .congratulations__star {
    position: absolute;
    top: 50%;
    left: 50%; }
  .congratulations__starImage {
    transform: translate(-50%, -50%); }
  .congratulations__banner {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: #da0000;
    font-family: "FibelNord";
    font-size: 24px;
    letter-spacing: 0.05em; }
  .congratulations__button {
    margin-bottom: -20px;
    padding: 0;
    cursor: pointer; }
    .congratulations__button.buttonHidden {
      opacity: 0;
      visibility: hidden;
      transition: visibility .4s, opacity .4s; }
      .buttonVisible .congratulations__button.buttonHidden {
        opacity: 1;
        visibility: visible; }
  @media screen and (min-width: 1024px) {
    .congratulations__fakeDevice {
      width: 1024px;
      height: 768px; }
    .congratulations__banner {
      bottom: 60px;
      font-size: 36px; } }

.memoBoardApp {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: url("../ui/bg/flipcards_bg@2x~ipad.png") no-repeat center;
  background-size: cover;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none; }
  .memoBoardApp__congratulations {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 10;
    width: 100%;
    height: 100%; }

.memoBoard__stage {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: row;
  flex-wrap: wrap; }
  .memoBoard__stage[data-level="easy"] {
    width: 450px; }
  .memoBoard__stage[data-level="medium"] {
    width: 400px; }
  .memoBoard__stage[data-level="hard"] {
    width: 400px; }

.memoBoard__card {
  display: flex;
  align-items: center;
  justify-content: center; }
  [data-level="easy"] .memoBoard__card {
    width: 150px;
    height: 150px; }
  [data-level="medium"] .memoBoard__card {
    width: 100px;
    height: 100px; }
  [data-level="hard"] .memoBoard__card {
    width: 80px;
    height: 76px; }

.memoBoard__loader {
  text-align: center; }

.memoBoard__loaderBar {
  position: relative;
  width: 200px;
  height: 16px;
  background-color: #eee; }

.memoBoard__loaderBarInner {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background-color: #f00;
  transition: width .4s; }

.memoBoard__loaderProgress {
  margin-top: 10px; }

@media screen and (min-width: 1024px) {
  .memoBoard__stage[data-level="easy"] {
    width: 900px; }
  .memoBoard__stage[data-level="medium"] {
    width: 900px; }
  .memoBoard__stage[data-level="hard"] {
    width: 870px; }
  [data-level="easy"] .memoBoard__card {
    width: 300px;
    height: 300px; }
  [data-level="medium"] .memoBoard__card {
    width: 225px;
    height: 225px; }
  [data-level="hard"] .memoBoard__card {
    width: 174px;
    height: 164px; } }

.memoCard {
  display: inline-block;
  perspective: 1000px;
  cursor: pointer; }
  .hidden .memoCard {
    cursor: default;
    pointer-events: none; }
  .memoCard__inner {
    position: relative; }
  .memoCard__backFace {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2; }
  .memoCard__frontFace {
    position: relative; }
  .memoCard__tileContainer {
    position: relative;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    -webkit-backface-visibility: hidden;
            backface-visibility: hidden; }
    .memoCard__tileContainer--back {
      transform: perspective(1000px) rotateY(0deg);
      -webkit-filter: brightness(1);
              filter: brightness(1);
      transition: transform 0.6s, -webkit-filter 0.6s;
      transition: transform 0.6s, filter 0.6s;
      transition: transform 0.6s, filter 0.6s, -webkit-filter 0.6s; }
      .open .memoCard__tileContainer--back {
        -webkit-filter: brightness(0.1);
                filter: brightness(0.1);
        transform: perspective(1000px) rotateY(-180deg); }
    .memoCard__tileContainer--front {
      transform: perspective(1000px) rotateY(180deg); }
      .open .memoCard__tileContainer--front {
        transform: perspective(1000px) rotateY(0deg); }
  .memoCard__cardImage {
    position: relative; }
    .memoCard__cardImage--overlay {
      position: absolute;
      z-index: 1;
      top: 0;
      left: 0;
      height: auto; }
    [data-level="easy"] .memoCard__cardImage {
      width: 112px; }
    [data-level="medium"] .memoCard__cardImage {
      width: 80px; }
    [data-level="hard"] .memoCard__cardImage {
      width: 72px; }
  @media screen and (min-width: 1024px) {
    [data-level="easy"] .memoCard__cardImage {
      width: 224px; }
    [data-level="medium"] .memoCard__cardImage {
      width: 190px; }
    [data-level="hard"] .memoCard__cardImage {
      width: 150px; } }

.levelSelect {
  margin: 0;
  padding: 0;
  list-style-type: none;
  font-size: 0; }
  .levelSelect__buttons {
    padding-left: 0;
    white-space: nowrap; }
  .levelSelect__button {
    position: relative;
    display: inline-block;
    padding: 0 10px; }
    .levelSelect__button:nth-child(1) {
      transform: translateX(100%); }
    .levelSelect__button:nth-child(2) {
      z-index: 1; }
    .levelSelect__button:nth-child(3) {
      transform: translateX(-100%); }
    .levelSelect__button:nth-child(1), .levelSelect__button:nth-child(3) {
      opacity: 0.3;
      transition: opacity .4s, transform .4s; }
      .menuOn .levelSelect__button:nth-child(1), .menuOn .levelSelect__button:nth-child(3) {
        opacity: 1;
        transform: none; }
    .levelSelect__button--smaller {
      opacity: 0; }
      .levelSelect__button--smaller:nth-child(1) {
        opacity: 0;
        transform: translateY(-100px);
        transition: opacity .3s, transform .3s;
        transition-delay: 0.1s; }
        .menuOn .levelSelect__button--smaller:nth-child(1) {
          opacity: 1;
          transform: none; }
      .levelSelect__button--smaller:nth-child(2) {
        opacity: 0;
        transform: translateY(-100px);
        transition: opacity .3s, transform .3s;
        transition-delay: 0.2s; }
        .menuOn .levelSelect__button--smaller:nth-child(2) {
          opacity: 1;
          transform: none; }
      .levelSelect__button--smaller:nth-child(3) {
        opacity: 0;
        transform: translateY(-100px);
        transition: opacity .3s, transform .3s;
        transition-delay: 0.3s; }
        .menuOn .levelSelect__button--smaller:nth-child(3) {
          opacity: 1;
          transform: none; }
      .levelSelect__button--smaller:nth-child(4) {
        opacity: 0;
        transform: translateY(-100px);
        transition: opacity .3s, transform .3s;
        transition-delay: 0.4s; }
        .menuOn .levelSelect__button--smaller:nth-child(4) {
          opacity: 1;
          transform: none; }

.levelSelectButton {
  cursor: pointer; }
  .levelSelectButton:focus {
    outline: none; }