/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */

/* Document
   ========================================================================== */

/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 */

html {
  line-height: 1.15; /* 1 */
  -webkit-text-size-adjust: 100%; /* 2 */
}

/* Sections
   ========================================================================== */

/**
 * Remove the margin in all browsers.
 */

body {
  margin: 0;
}

/**
 * Render the `main` element consistently in IE.
 */

main {
  display: block;
}

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Firefox, and Safari.
 */

h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

/* Grouping content
   ========================================================================== */

/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */

hr {
  box-sizing: content-box; /* 1 */
  height: 0; /* 1 */
  overflow: visible; /* 2 */
}

/**
 * 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;
}

/**
 * 1. Remove the bottom border in Chrome 57-
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */

abbr[title] {
  border-bottom: none; /* 1 */
  text-decoration: underline; /* 2 */
  text-decoration: underline dotted; /* 2 */
}

/**
 * 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%;
}

/**
 * Prevent `sub` and `sup` elements from affecting the line height in
 * all browsers.
 */

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/* Embedded content
   ========================================================================== */

/**
 * Remove the border on images inside links in IE 10.
 */

img {
  border-style: none;
}

/* Forms
   ========================================================================== */

/**
 * 1. Change the font styles in all browsers.
 * 2. Remove the margin in Firefox and Safari.
 */

button,
input,
optgroup,
select,
textarea {
  font-family: inherit; /* 1 */
  font-size: 100%; /* 1 */
  line-height: 1.15; /* 1 */
  margin: 0; /* 2 */
}

/**
 * Show the overflow in IE.
 * 1. Show the overflow in Edge.
 */

button,
input { /* 1 */
  overflow: visible;
}

/**
 * Remove the inheritance of text transform in Edge, Firefox, and IE.
 * 1. Remove the inheritance of text transform in Firefox.
 */

button,
select { /* 1 */
  text-transform: none;
}

/**
 * Correct the inability to style clickable types in iOS and Safari.
 */

button,
[type="button"],
[type="reset"],
[type="submit"] {
  -webkit-appearance: button;
}

/**
 * Remove the inner border and padding in Firefox.
 */

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0;
}

/**
 * Restore the focus styles unset by the previous rule.
 */

button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
  outline: 1px dotted ButtonText;
}

/**
 * Correct the padding in Firefox.
 */

fieldset {
  padding: 0.35em 0.75em 0.625em;
}

/**
 * 1. Correct the text wrapping in Edge and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove the padding so developers are not caught out when they zero out
 *    `fieldset` elements in all browsers.
 */

legend {
  box-sizing: border-box; /* 1 */
  color: inherit; /* 2 */
  display: table; /* 1 */
  max-width: 100%; /* 1 */
  padding: 0; /* 3 */
  white-space: normal; /* 1 */
}

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */

progress {
  vertical-align: baseline;
}

/**
 * Remove the default vertical scrollbar in IE 10+.
 */

textarea {
  overflow: auto;
}

/**
 * 1. Add the correct box sizing in IE 10.
 * 2. Remove the padding in IE 10.
 */

[type="checkbox"],
[type="radio"] {
  box-sizing: border-box; /* 1 */
  padding: 0; /* 2 */
}

/**
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
  height: auto;
}

/**
 * 1. Correct the odd appearance in Chrome and Safari.
 * 2. Correct the outline style in Safari.
 */

[type="search"] {
  -webkit-appearance: textfield; /* 1 */
  outline-offset: -2px; /* 2 */
}

/**
 * Remove the inner padding in Chrome and Safari on macOS.
 */

[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}

/**
 * 1. Correct the inability to style clickable types in iOS and Safari.
 * 2. Change font properties to `inherit` in Safari.
 */

::-webkit-file-upload-button {
  -webkit-appearance: button; /* 1 */
  font: inherit; /* 2 */
}

/* Interactive
   ========================================================================== */

/*
 * Add the correct display in Edge, IE 10+, and Firefox.
 */

details {
  display: block;
}

/*
 * Add the correct display in all browsers.
 */

summary {
  display: list-item;
}

/* Misc
   ========================================================================== */

/**
 * Add the correct display in IE 10+.
 */

template {
  display: none;
}

/**
 * Add the correct display in IE 10.
 */

[hidden] {
  display: none;
}

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Nunito', sans-serif;
  background-image: url(5cd0e1f86380975ac51b6bb2f2b26e30.svg);
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
  height: 100%;
}
.header {
  display: flex;
  justify-content: space-between;
}
.title {
  margin: 50px auto 0;
  text-decoration: none;
  color: #000000;
  font-size: 2rem;
  height: 10px;
}
@media (max-width: 768px) {
  .title {
    display: none;
  }
}
.menu {
  font-family: 'Dosis', sans-serif;
  width: 300px;
  height: 100%;
  background-color: #fdb900;
  position: fixed;
  top: 0;
  left: -300px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 0 20% 60% 0;
  transition: left 0.8s cubic-bezier(1, 0, 0, 1);
  z-index: 1;
}
.menu__burger {
  width: 35px;
  height: 30px;
  position: inherit;
  top: 50px;
  left: 50px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.menu__list {
  text-align: left;
}
.menu__item {
  list-style: none;
  margin: 25px;
}
.menu__link {
  text-decoration: none;
  font-size: 22px;
  color: #000000;
  font-weight: 400;
  letter-spacing: 1px;
  text-transform: uppercase;
  position: relative;
  padding: 3px 0;
  cursor: pointer;
}
.menu__link::before,
.menu__link::after {
  content: '';
  width: 100%;
  height: 2px;
  background-color: chocolate;
  position: absolute;
  left: 0;
  transform: scaleX(0);
  transition: transform 0.5s;
}
.menu__link::before {
  top: 0;
  transform-origin: left;
}
.menu__link::after {
  bottom: 0;
  transform-origin: right;
}
.menu__link:hover::before,
.menu__link:hover::after {
  transform: scaleX(1);
}
.active {
  font-weight: 700;
}
.line {
  width: 100%;
  height: 4px;
  background-color: black;
  transition: all 0.8s;
}
.change {
  left: 0;
}
.change .line1 {
  transform: rotateZ(-405deg) translate(-13px, 6px);
}
.change .line2 {
  opacity: 0;
}
.change .line3 {
  transform: rotateZ(405deg) translate(-13px, -6px);
}
.mode__switcher {
  width: 295px;
  height: 179px;
  margin-top: -57px;
}
.mode__switcher #switcher {
  display: none;
}
.mode__switcher #button {
  position: relative;
  display: block;
  width: 350px;
  height: 150px;
  background-color: #ac0156;
  border-radius: 350px;
  cursor: pointer;
  transform: scale(0.4);
  margin: 50px auto;
}
.mode__switcher .round {
  width: 140px;
  height: 140px;
  background-color: #fff;
  background-size: 700px;
  position: relative;
  top: 5px;
  left: 4px;
  border-radius: 290px;
  transition: 0.4s ease left, 0.4s ease background-position;
  z-index: 2;
}
.mode__switcher .play,
.mode__switcher .train {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-size: 48px;
  font-weight: bold;
  z-index: 1;
}
.mode__switcher .train {
  margin-left: 30px;
}
.mode__switcher .play {
  margin-left: 205px;
}
.mode__switcher #switcher:checked + #button {
  background-color: #b10022;
}
.mode__switcher #switcher:checked + #button .round {
  left: 205px;
  background-position: -350px 0;
}
.card {
  width: 100%;
  max-width: 245px;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 15%;
  text-align: left;
  text-transform: uppercase;
  position: relative;
  margin-bottom: 40px;
  height: 270px;
  transition: all 0.5s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.card:hover {
  cursor: pointer;
  box-shadow: 5px 5px 18px -6px black;
}
.card__word {
  padding: 0 0 15px 25px;
  font-size: 1.5rem;
  display: block;
}
.card__rotate-icon {
  background-image: url(8a643d3a7dcc840a423108fd9da1d083.svg);
  width: 20px;
  height: 20px;
  background-size: contain;
  position: absolute;
  bottom: 20px;
  right: 25px;
  filter: contrast(0.5);
}
.card__front-image,
.card__back-image {
  width: 200px;
  height: 200px;
  background-size: contain;
  margin: 10px auto;
}
.card__front,
.card__back {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  transition: all 0.5s ease;
  backface-visibility: hidden;
}
.card__back {
  transform: rotateY(180deg) scale(-1, 1);
}
.rotate__front {
  transform: rotateY(180deg);
}
.rotate__back {
  transform: rotateY(360deg);
}
.category__container {
  width: 100%;
  max-width: 1200px;
  margin: 23px auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-evenly;
}
.app__container {
  display: flex;
  flex-wrap: wrap;
}
.category__card {
  width: 100%;
  max-width: 245px;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 15%;
  text-align: left;
  text-transform: uppercase;
  position: relative;
  margin: 10px 10px 50px 10px;
}
.category__card:hover {
  cursor: pointer;
  box-shadow: 5px 5px 18px -6px black;
}