:root {
  --theme-color1: #2A3040;
  --theme-color2: #84ceeb;
  --theme-color3: #3f6675;
  --theme-color4: #c1c8e4;
  --theme-color5: #8860d0;
  --base-color1: rgba(57,65,86,0.73);
  --base-color2: rgba(57,65,86,0.4);
  --text-color1: black;
  --text-color2: #888;
  --footer-color: #2A3040;
}
@font-face {
  font-family: Ratchicons;
  font-style: normal;
  font-weight: normal;

  src: url("../fonts/ratchicons.eot");
  src: url("../fonts/ratchicons.eot?#iefix") format("embedded-opentype"), url("../fonts/ratchicons.woff") format("woff"), url("../fonts/ratchicons.ttf") format("truetype"), url("../fonts/ratchicons.svg#svgFontName") format("svg");
}
/* 
 * SCROLLBAR
 * * * * * * * * * * * * * * * * * * * * * * */
::-webkit-scrollbar {
  width: 12px;
}
/* Track */
::-webkit-scrollbar-track {
  -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.8);
}
/* Handle */
::-webkit-scrollbar-thumb {
  background: #6b6de6;
  border-radius: 10px;
  box-shadow: inset 0 0 4px rgba(255,255,255,0.8);
  -webkit-box-shadow: inset 0 0 4px rgba(255,255,255,0.8);
}
::-webkit-scrollbar-thumb:window-inactive {
	background: rgba(150,150,150,0.4);
}
* {
  /* disable text selection */
  -webkit-touch-callout:none;
  -webkit-user-select:none;
  -moz-user-select:none;
  -ms-user-select:none;
  user-select:none;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
@font-face {
  font-family: 'notoEmoji';
  src: url('../fonts/notoemoji.ttf') format('truetype'),
   url('../fonts/notoemoji.woff') format('woff'),
   url('../fonts/notoemoji.woff2') format('woff2');
}
/* 
 * HTML
 * * * * * * * * * * * * * * * * * * * * * * */
html {
  font-family: Arial,'Hiragino Sans GB',STXihei,'Microsoft YaHei',sans-serif;
  text-align: center;
  background-color: var(--theme-color1);
  color: white;
  font-size: 12pt;
  /* background-image: linear-gradient( 135deg, #43CBFF 10%, #9708CC 100%); */
  height: 100%;
}
body {
  overflow: hidden;
  display: grid;
  margin: 0;
  font-size: 9pt; 
}
div#bodyWrapper {
  display: grid;
  grid-template-rows: 10% minmax(90%, 1fr) 10%;
  grid-template-areas: "header"  "main"  "footer";
  height: 100vh;
}

div#bodyWrapper2 {
  grid-template-rows: 10% minmax(90%, 1fr) 10%;
  grid-template-areas: "header"  "main";
  height: 100vh;
}

main {
  height: 100%;
  grid-area: main;
  margin: 0 10px;
}
i {
  font-family: 'notoEmoji', Fallback, sans-serif;
  font-style: normal;
}
a, button {
  cursor: pointer;
}
/* 
 * HEADER
 * * * * * * * * * * * * * * * * * * * * * * */
div#bodyWrapper > header {
  font-size: 1.3em;
  font-weight: bold;
  border-bottom: solid;
  border-image: linear-gradient(to right, rgba(0,0,0,0) 0%, rgba(0,0,0,0) 15%,
  rgba(255,255,255,0.5) 50%, rgba(0,0,0,0) 85%, rgba(0,0,0,0) 100%);
  border-image-slice: 1;
  border-width: 5px;
  margin: 0;
  grid-area: header;
}
header button { border-radius: 5px; margin-top: 8px; }
#page1, #page2, #page3 {
  animation: fadein .5s linear;
  height: 100%;
}
#page2, #page3 {
  display: none;
}
/* 
 * PAGE 1
 * * * * * * * * * * * * * * * * * * * * * * */
header.popupHeader {
	display: flex;
	justify-content: center;
	margin: 10px 0 30px 0;
	width: 100%;
}
header.popupHeader > div {
	display: flex;
	justify-content: space-between;
	width: 80%;
}
#eflip, #eSrs {
  background-color: transparent;
  width: 80%;
  height: 50%;
  margin-top: -10px;
  color: var(--text-color1);
  perspective: 1000px;
}
/* Menu */
#cardDiv {
  position: relative;
  display: grid;
  grid-gap: 10px;
  grid-template-columns: minmax(0, 33%) minmax(0, 33%) minmax(0, 33%);
  width: 100%;
  height: 100%;
  color: black;
  font-size: 1.2rem;
}
#cardDiv1 {
  position: relative;
  display: grid;
  grid-gap: 10px;
  grid-template-columns: minmax(0, 100%);
  width: 100%;
  height: 100%;
  color: black;
  font-size: 1.2rem;
}

.cards {
  width: 100%;
  position: relative;
  background-color: white;
  border-radius: 10px;
  border: 1px solid #4CAF50;
  line-height: 8pt;
  transform-style: preserve-3d;
  animation: rotate3D 0.5s linear;
  transition: transform .5s;
}

.cardsFlip {
  animation: none;
}
.cards p:nth-child(even) {
  /* font-weight: bold; */
  line-height: 32pt;
  font-size: 2.0rem;
  overflow: hidden;
}
.cards p:nth-child(odd) {
  color: var(--text-color2);
  font-size: 1.2rem;
  line-height: 28pt;
  overflow: hidden;
  /* white-space: nowrap; */
}
.cards p:last-child {
  line-height: 1.2rem;
  height: 3.0rem;
}
div.cardsMain > div > a {
	display: inline-block;
	margin-top: 20px;
}
/* Study screen */
.bigCard {
  background-color: transparent;
  width: 100%;
  height: 100%;
  position: relative;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}
.bigCard.flipped {
  transform: rotateY(-180deg);
}
p.hidePinyin {
	opacity: 0;
	pointer-events: none;
}
.front, .back {
  background-color: white;
  border-radius: 10px;
  line-height: 5pt;
  font-size: 1.1rem;
  padding: 0;
  position: absolute;
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  overflow: hidden;
  backface-visibility: hidden;
}
.front {
  font-size: 3.5rem;
}
.front p, .back p {
  height: 60px;
  margin: 20px;
  transition: opacity 1s;

}
.front p:first-child, .back p:first-child {
  color: var(--text-color2);
  font-size: 3rem;
}
.back {
  transform: rotateY(-180deg);
}
progress[value] {
  -webkit-appearance: none;
  appearance: none;

  width: 80%;
  height: 5px;
  position: absolute;
  bottom: 25px;
}
progress[value]::-webkit-progress-bar {
  background-color: var(--theme-color2);
  border-radius: 2px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.25) inset;
}
progress[value]::-webkit-progress-value {
  background-color: white;
  border-radius: 2px;
  background-size: 35px 20px, 100% 100%, 100% 100%;
  transition: width 1.5s ease;
}
.studyBtn {
  display: grid;
  grid-gap: 7px;
  grid-template-columns: minmax(0, 33%) minmax(0, 33%) minmax(0, 33%);
  width: 93%;
}
.studyBtn button {
  position: relative;
  padding: 0;
  width: 100%;
  border-radius: 10px;
  height: 8rem;
  font-weight: normal;
  font-size: 0.9rem;
  overflow: hidden;
  /* box-shadow: inset 0 0 2rem rgba(100,0,0,0.5); */
  transition: box-shadow .3s, border .3s, background-color .3s;
}
.studyBtn button:disabled {
  /* background-color: rgba(0,0,0,0.7); */
  cursor: auto;
}
.active {
	animation: plop 0.3s forwards;
}
.studyBtn button::after {
  content: '';
  position: absolute;
  width: 5px;
  height: 5px;
  top: 50%;
  left: 50%;
  background: rgba(0, 0, 0, .5);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%);
}
.switch {
  position: relative;
  display: inline-block;
  top: -7px;
  width: 49px;
  height: 29px;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--theme-color2);
  border: 2px solid white;
  border-radius: 20px;
  -webkit-transition: .4s;
  transition: .4s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  top: 3.5px;
  left: 5px;
  border-radius: 50%;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}
input:checked + .slider {
  background-color: transparent;
}
input:focus + .slider {
  box-shadow: 0 0 1px transparent;
}
input:checked + .slider:before {
  -webkit-transform: translateX(100%);
  transform: translateX(100%);
}
/* Result */
#studyResults ul:not(:last-child) {
    margin: 0 0 15px 0;
}
#studyResults ul {
    list-style: none;
    padding: 10px 0;
    width: 100%;
    background-color: rgba(0,0,0,0.5);
    border-radius: 4px;
}
#studyResults ul li:first-child {
    margin: 10px;
    padding: 10px;
    background-color: rgba(0,0,0,0.5);
    font-size: 1.2rem;
}
#studyResults > div {
	width: 80%;
	height: 70%;
	overflow-y: auto;
}
button#resultButton { margin-top: 15px; }
/* 
 * PAGE 2
 * * * * * * * * * * * * * * * * * * * * * * */
.review {
  display: flex;
  justify-content: center;
  flex-direction: column;
}
div#SRS {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background-color: white;
  align-self: center;
  color: var(--text-color1);
  display: flex;
  text-align: center;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  cursor: pointer;
}
div.srsInfo { margin-bottom: 20px; }
.settings {
  width: 100%;
  display: flex;
  flex-direction: column;
}
.settings .btn {
  margin-bottom: 18px;
}
#settingsPopup>div>button, #resetPopup>div>button {
	margin-top: 10px;
}
#infoPopup {
	z-index: 720;
	background-color: rgba(0,0,0,0.8);
}
#infoPopup div, div.popup > div.whitebox {
  color: black;
  display: flex;
  border-radius: 4px;
  justify-content: space-around;
  background-color: rgba(255,255,255,0.8);
  flex-flow: column wrap;
  width: 80%;
  height: auto;
  padding: 10px;
}
div.whitebox h4 {
	font-size: 1.5em;
	width: 100%;
}
textarea {
	resize: none;
	overflow-x: hidden;
	overflow-y: scroll;
	padding: 3px;
}
/* 
 * PAGE 3
 * * * * * * * * * * * * * * * * * * * * * * */
#page3 #listWords {
  overflow-y: auto;
  height: calc(100% - 60px);
}
#page3 #listWords>div>p {
	position: relative;
	font-size: 1.6rem;
	color: black;
	text-align: left;
	background-color: white;
	border-radius: 5px;
	margin: 5px 0 1px 0;
	padding: 10px 10%;
	cursor: pointer;
}
#page3 #listWords>div>p::after {
  font-family: 'Ratchicons';
	content: '\e820';
	position: absolute;
	right: 20px;
}
#page3 #listWords>div>div {
	display: none;
	font-size: 1rem;
	color: black;
	background-color: #efeff0;
	border-radius: 5px;
}
#page3 #listWords>div>div>div {
	display: grid;
	grid-template-columns: 30% 30% 40%;
	background-color: rgb(255, 255, 255);
	margin: 2px 0;
	border-radius: 5px;
}
#page3 #listWords>div>div.lwshow {
	display: block;
}
#page3 #listWords>div>p.lwshow {
	background-color: lavender;
}
/* 
 * POPUPS
 * * * * * * * * * * * * * * * * * * * * * * */
div#study, div#srsPopup {
	justify-content: flex-start;
}
.closePopup {
  position: absolute;
  width: 64px;
  height: 64px;
  font-size: 3em;
  top: 0;
  right: 0;
  z-index: 99999;
  cursor: pointer;
}
.closePopup:hover {
  color: #5ab9ea;
}
/* Styling Checkbox */
div.popup {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  z-index: 720;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  background: var(--theme-color1);
  transition: .2s;
}
#hskPopup div {
  color: black;
  display: flex;
  border-radius: 4px;
  justify-content: space-around;
  flex-flow: row wrap;
  width: 80%;
  padding: 10px;
}
#hskPopup div h4 {
  width: 100%;
}
#hskPopup div, div.popup button {
  color: black;
  background-color: rgba(255,255,255,0.95)
}
#hskPopup div p {
  width: 33%;
}
input[type=checkbox] + label {
  display: block;
  cursor: pointer;
}
input[type=checkbox] {
  display: none;
}
input[type=checkbox] + label:before {
  content: " ";
  border: 0.1em solid #000;
  border-radius: 0.4em;
  display: inline-block;
  width: 1.2em;
  height: 1.2em;
  padding: 0.1em 0.2em 0.2em 0.1em;
  margin-right: 0.2em;
  color: transparent;
  transition: .2s;
}
input[type=checkbox] + label:active:before {
  transform: scale(0);
}
input[type=checkbox]:checked + label:before {
  background-color: rgba(0,0,0,0.7);
  border-color: 0.1em solid var(--theme-color1);
  color: #fff;
}
/* 
 * FOOTER
 * * * * * * * * * * * * * * * * * * * * * * */
footer {
  display: flex;
  margin: 0;
  bottom: 0;
  left: 0;
  justify-content: space-between;
  background-color: var(--footer-color);
  border-top: 10px solid var(--footer-color);
  width: 100%;
  grid-area: footer;
  position: relative;
  z-index: 520;
}
footer button {
  text-align: center;
  font-size: 1.5em;
  color: white;
  background-color: transparent;
  border-radius: 0;
  padding: 6px 0;
  width: 100%;
}
footer .active {
  transform: translate(0,-5px);
}
footer .active:after {
  content: '__';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translate(-50%,0);
}
/* 
 * BUTTON
 * * * * * * * * * * * * * * * * * * * * * * */
button {
  position: relative;
  background-color: white;
  border: none;
  border-radius: 50px;
  padding: 10px 50px;
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--theme-color1);
}
/* button.btn {
	box-shadow: 0 5px rgba(255,220,220,0.9);
}
button.btn:active {
	box-shadow: 0 2px rgba(255,220,220,0.9);
	transform: translateY(3px);
} */
button#mainStudyBtn, button#hskButton {
	display: block;
	margin: 20px auto 0 auto;
}
.animate-1 {
  animation: fadein 1s linear;
}
.animate-2 {
  animation: fadeleft .7s linear;
}
.animate-3 {
  animation: fade 1s linear;
}
@keyframes rotate3D {
  from { transform: rotateY(-180deg); opacity: 0; }
  to { transform: rotateY(0deg); opacity: 1; }
}
@keyframes fade {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes ripple {
  0% { transform: scale(0, 0); opacity: 1; }
  10% { transform: scale(10, 10); opacity: 1; }
  100% { transform: scale(100, 100); opacity: 0; }
}
@keyframes plop {
	0% { transform: scale3d(0.3, 0.3, 1); }
	25%, 50% { opacity: 1; }
	100% {
		opacity: 1;
		transform: scale3d(1, 1, 1);
	}
}
@keyframes fadein {
    from { transform: translate(0,20px); opacity: 0; }
    to { transform: translate(0,0); opacity: 1; }
}
@keyframes fadeleft {
    from { transform: translate(50px,0); opacity: 0; }
    to { transform: translate(0,0); opacity: 1; }
}