:root {
  --media-only-screen-max-width: 840px;
  --body-background: #fff; /*linear-gradient(135deg, #f8f8f8, #fff);*/
  --article-background: #ffffff;
  --header-background: transaprent;/*linear-gradient(to right, #485563, #29323c);*/
  --header-link-color: #ffffff;
  --header-link-color-hovered: #ffffff90;
  --font-color-on-dark: #ffffff;
  --font-color-on-light: #111111;
  --font-family-for-reading: 'PT Serif', serif;
  --font-family-for-interacting: Tahoma, sans-serif;
  --article-box-shadow: rgba(0, 0, 0, 0.12) 0px 1px 3px, rgba(0, 0, 0, 0.24) 0px 1px 2px;
  --div-box-shadow: rgba(9, 30, 66, 0.45) 0px 1px 1px, rgba(9, 30, 66, 0.25) 0px 0px 1px 1px;
  --input-box-shadow: rgba(44, 58, 71, 0.65) 0px 1px 1px, rgba(44, 58, 71, 0.45) 0px 0px 1px 1px;
  --input-box-shadow-focus: rgba(44, 58, 71, 0.65) 0px 2px 2px, rgba(44, 58, 71, 0.45) 0px 0px 2px 2px;
  --checkbox-height: 25px;
  --button-box-shadow: rgba(44, 58, 71, 0.65) 0px 1px 1px, rgba(44, 58, 71, 0.45) 0px 0px 1px 1px;
  --button-box-shadow-hover: rgba(44, 58, 71, 0.65) 0px 3px 3px, rgba(44, 58, 71, 0.45) 0px 0px 3px 3px;
  --button-box-shadow-active: rgba(44, 58, 71, 0.65) 0px 2px 2px, rgba(44, 58, 71, 0.45) 0px 0px 2px 2px;
  --toolbar-background-color: #F6F8FA;
  --tolbar-border-color: #BCBCBC;
}

@font-face {
  font-family: 'FiraCode';
  src: url(/font/FiraCode-Regular.ttf) format('truetype');
  font-display: swap;
}

html {
  font-size: 112.5%;
}

body {
  background: var(--body-background);
  margin-bottom: 2rem;
}

article {
  overflow: hidden;
  background: var(--article-background);
  box-sizing: border-box;
  width: var(--media-only-screen-max-width);
  margin: 0 auto;
  padding: 0.5rem;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;

  /*  box-shadow: var(--article-box-shadow);*/
}

header {
  background: var(--header-background);
  box-sizing: border-box;
  padding: 1rem;
  color: var(--font-color-on-dark);
  font-family: var(--font-family-for-interacting);
  text-align: center;
  border-bottom: 1.5px solid #29323c80;
}

header a:has(img) {
  display: block;
  width: fit-content;
  margin: 0 auto;
  padding: 0.25rem;
}

header a:not(:has(img)) {
  color: var(--header-link-color);
  display: inline-block;
  margin-top: 0.5rem;
  margin-left: 1rem;
  font-size: 1.1rem;
  text-decoration: none;
}

header a:not(:has(img)):hover {
  color: var(--header-link-color-hovered);
}

section {
  box-sizing: border-box;
  padding: 0rem 0.5rem;
  font-family: var(--font-family-for-reading);
}

footer {
  box-sizing: border-box;
  padding-top: 1rem;
  font-size: 0.8rem;
  text-align: center;
  font-family: var(--font-family-for-interacting);
}

footer a {
  color: var(--font-color-on-light);
}

h1 {
  font-size: 2.4rem;
}

h2 {
  font-size: 1.8rem;
}

h3 {
  font-size: 1.2rem;
}

summary h3 {
  margin: 0;
}

h4 {
  font-size: 1.2rem;
}

p {
  font-size: 0;
  line-height: 0;
  margin: 0;
  padding: 0;
}

p:not(:empty) {
  font-size: 1.2rem;
  line-height: 1.7rem;
}

p:not(:empty) + p:not(:empty) {
  margin-top: 1rem;
}

a {
  color: var(--font-color-on-light);
}

img[data-original-size="true"] {
  margin-left: auto;
  margin-right: auto;
  display: block;
  box-sizing: border-box;
}

img:not([data-original-size="true"]):not(.copy-icon):not(:where(label img)) {
  width: 100%;
}

div:not(group):has(img[data-original-size="true"]) label {
  margin-top: -1.6rem;
}

div:not(group):has(img[data-original-size="true"]):not(:has(label)) img[data-original-size="true"] {
  margin-top: -1.6rem;
}

img {
  display: inline-block;
  box-sizing: border-box;
  border-radius: 8px;
}

ul {
  font-family: var(--font-family-for-interacting);
}

ol {
  font-family: var(--font-family-for-interacting);
}

li {
  line-height: 1.6rem;
}

li input[type="checkbox"] {
  width: 1.2rem;
  height: 1.2rem;
}

p:not(:empty) + div:not(:empty), div:not(:empty) + p:not(:empty) {
  margin-top: 1.2rem;
}

div:not(.group) {
  position: relative;
  overflow-x: auto;
  scrollbar-width: none;
  box-sizing: border-box;
  box-shadow: var(--div-box-shadow);
  border-radius: 8px;
  padding: 1.2rem;
  font-size: 1.2rem;
  font-family: var(--font-family-for-interacting);
  width: 100%;
}

div:not(.group) + div:not(.group) {
  margin-top: 1em;
}

div:not(.group) + br + div:not(.group) {
  margin-top: 1em;
}

div::-webkit-scrollbar { 
  display: none;  /* Hide scroll bar for Safari and Chrome */
}

div:not(.group) span:has(img) + pre {
  margin-top: -1.6rem;
  margin-bottom: 0rem;
  box-sizing: border-box;
  background-color: #fefefe;
  z-index: -1;
  width: max-content;
  cursor: text;
}

div:not(.group):has(pre) span:has(img) {
  cursor: text;
}

div:not(.group) svg {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

div:not(.group):has(span) svg {
  margin-top: -1.6rem;
}

div:not(.group):has(svg),
div:not(.group):has(midi-player) {
  padding: 0;
}

div:not(.group):has(svg) img.copy-icon {
  top: 0.6em;
  right: 0.6em;
}

div:not(.group):has(svg) label {
  position: absolute;
  top: 0.25rem;
  left: 0.25rem;
}

div:not(.group):has(table) {
  padding: 0;
  box-shadow: none;
}

div.group br {
  display: none;
}

span {

}

span.quote {
  display: block;
  width: max-content;
  max-width: 80%;
  height: auto;
  margin: 1em auto;
}

span.quote-text {
  text-align: left;
  padding: 0.2em;
  font-style: italic;
  color: #454545;
  font-size: 1.25rem;
}

span.quote-author {
  display: block;
  font-size: 0.75em;
  text-align: right;
  color: #767676;
}

input::placeholder {
  font-style: italic;
  opacity: 0.6;
  color: #101010;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="url"],
input[type="tel"],
textarea,
select {
  display: block;
  box-sizing: border-box;
  width: 100%;
  max-width: 450px;
  margin: 0 auto;
  font-family: var(--font-family-for-interacting);
  font-size: 1.5rem;
  padding: 1.5rem;
  outline: none;
  border: 8px solid white;
  border-radius: 4px;
  box-shadow: var(--input-box-shadow);
  accent-color: #2C3A47;
}

input[type="date"]::-webkit-calendar-picker-indicator,
input[type="time"]::-webkit-calendar-picker-indicator,
input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  cursor: pointer;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="datetime-local"]:focus,
input[type="url"]:focus,
input[type="tel"]:focus,
textarea:focus,
select:focus {
  box-shadow: var(--input-box-shadow-focus);
}

input[type="number"] {
  max-width: 250px;
  padding: 0;
}

input[type="checkbox"],
input[type="radio"] {
  accent-color: #2C3A47;
  outline: none;
  cursor: pointer;
}

label input[type="checkbox"],
label input[type="radio"] {
  width: 26px;
  height: 26px;
  vertical-align: middle;
  margin-right: 0.4rem;
}

label img {
  width: 36px;
  height: 36px;
  vertical-align: middle;
  margin-right: 0.1rem;
}

div:not(.group):has(label:not(.block)),
div:not(.group):has(label:not(.block)) {
  text-align: center;
  line-height: 3rem;
}

label:has(input[type="checkbox"]),
label:has(input[type="radio"]),
label:has(img) {
  padding: 0.6rem;
  margin: 0 auto;
  white-space: nowrap;
  cursor: pointer;
}

label.block:has(input[type="checkbox"]),
label.block:has(input[type="radio"]),
label.block:has(img) {
  display: block;
  width: max-content;
  white-space: nowrap;
}

label[data-correct="true"] {
  color: #009F6B;
}

label[data-correct="false"] {
  color: #C40233;
}

label img {
  display: inline-block;
  width: 2.0rem;
  vertical-align: middle;
}

label:has(img) {
}

legend {
  margin-bottom: 0.5rem;
}

button {
  background: #323232;
  color: #ffffff;
  cursor: pointer;
  display: block;
  box-sizing: border-box;
  width: 100%;
  max-width: 450px;
  margin: 0 auto;
  font-family: var(--font-family-for-interacting);
  font-size: 1.5rem;
  padding: 1.5rem;
  outline: none;
  border: 8px solid white;
  border-radius: 16px;
  box-shadow: var(--button-box-shadow);
  transition: 1.2s;
}

button:hover {
  background: #434343;
  box-shadow: var(--button-box-shadow-hover);
  transition: 0.5s;
}

button:active {
  background: #212121;
  box-shadow: var(--button-box-shadow-active);
  transition: 0s;
}

button.persist {
  background: #009F6B;
}

button.persist:hover {
  background: #19A879;
}

button.persist:active {
  background: #008F60;
}

button.delete {
  background: #C40233;
}

button.delete:hover {
  background: #C91B47;
}

button.delete:active {
  background: #B0012D;
}

button.download {
  background: #0087BD;
}

button.download:hover {
  background: #0095D1;
}

button.download:active {
  background: #0079A9;
}

form {

}

textarea {
  max-width: 650px;
  min-height: 250px;
  padding: 0.5rem;
  font-size: 1.1rem;
}

select {
  padding: 0.5rem;
  font-size: 1.1rem;
}

table {
  font-family: var(--font-family-for-interacting);
  border-collapse: separate;
  margin: 0 auto;
  width: 100%;
}

tbody tr:nth-of-type(odd) {
  background-color: #FFF5EE;
}

thead td:first-child {
  border-top-left-radius: 10px;
}

thead td:last-child {
  border-top-right-radius: 10px;
}

tbody tr:last-child td:first-child {
  border-bottom-left-radius: 10px;
}

tbody tr:last-child td:last-child {
  border-bottom-right-radius: 10px;
}

td {
  border: 1px solid var(--font-color-on-light);
  padding: 1.2rem;
}

thead {
  font-weight: bold;
}

iframe {

}

audio {

}

video {

}

canvas {

}

.progress-opacity {
  opacity: 0.65;
}

.copy-icon {
  position: absolute;
  top: -0.6rem;
  right: -0.6rem;
  width: 24px;
  height: 24px;
  opacity: 0.6;
  user-select: none;
}

.copy-icon:hover {
  opacity: 1.0;
  cursor: pointer;
}

span:has(img.copy-icon) {
  display: inline-block;
  position: sticky;
  width: 1px;
  height: 24px;
  z-index: 10;
  left: 100%;
  right: 0px;
  top: 0;
}

.katex-display {
  margin-top: -1.6rem;
  margin-bottom: 0em;
}

.katex-display span[class="base"] {
  padding-left: 1em;
  padding-right: 1em;
}

midi-player {
  display: block;
  width: 100%;
  box-sizing: content-box;
  position: sticky;
  left: 0;
  right: 0;
}

svg + midi-player,
label + midi-player {
  border-top: 1px solid var(--tolbar-border-color);
}

/*/////////////////////////////////// HIGHLIHGHT CLASSES ///////////////////////////////*/
/* By using shortcut class names, we optimise method innerHTML for highlighting */


/* comment-highlight */
.ch {
  color: #4C5866;
}

/* style-highlight */
.sh {
  color: #A01A4C;
}

/* style-value-highlight */
.svh {
  color: #A01A4C;
}

/* text-highlight */
.th {
  color: var(--editor-font-color);
}

/* element-highlight */
.eh {
  color: #0087BD;
}

/* string-highlight */
.sth {
  color: #00744E;
}

/* contains-number-highlight */
.cnh {
  color: #8F0125;
}

/* 
  text-highlight,
  contains-line-position-preposition-highlight,
  contains-measure-position-preposition-highlight,
  contains-stave-position-preposition-highlight,
  contains-voice-position-preposition-highlight,
  contains-unit-position-preposition-highlight
*/
.th,
.clpph,
.cmpph,
.cspph,
.cvpph,
.cupph {
  color: var(--editor-font-color);
}

/* contains-line-position-highlight */
.clph {
  color: #009F6B;
}

/* contains-measure-position-highlight */
.cmph {
  color: #832E61;
}

/* contains-stave-position-highlight */
.csph {
  color: #E26B1A;
}

/* contains-voice-position-highlight */
.cvph  {
  color: #008FA2;
}

/* contains-unit-position-highlight */
.cuph {
  color: #C40233;
}

/* not-recognizable-command-highlight */
.nrch {
  text-decoration: underline;
  text-decoration-color: #DD4444;
  text-decoration-skip: spaces;
  color: var(--editor-font-color);
}

/*/////////////////////////////END OF HIGHLIHGHT CLASSES ///////////////////////////////*/

.question-title {
  text-align: center;
  font-family: var(--font-family-for-interacting);
  font-size: 1.6rem;
  margin-top: 2rem;
}

.question-numbers-panel {
  font-weight: bold;
  cursor: default;
  user-select: none;
  padding: 0.5rem;
  margin-top: 2rem;
}

button.questionnaire-button {
  margin-top: 2rem;
}

.question-numbers-panel span {
  padding: 0.5rem;
}

.neutral-question-number {
  color: #111111;
}

.neutral-question-next-number {
  color: #11111180;
}

.correct-question-number {
  color: #009F6B;
}

.wrong-question-number {
  color: #C40233;
}

.final-score {
  text-align: center;
  font-size: 1.6rem;
  display: none;
  margin-top: 2rem;
}

@media only screen and (max-width: 840px) {
  html {
    font-size: 18px;
  }

  article {
    width: 100%;
  }
}

details:has(summary h3) {
  margin-top: 1rem;
}

summary {
  list-style: none;
  display: inline-flex;
  justify-content: space-between;
  align-items: center;
  padding-right: 1rem;
  font-weight: bold;
}

summary::after {
  content: '';
  width: 0; 
  height: 0; 
  border-top: 10px solid #111;
  border-inline: 7px solid transparent;
  margin-left: .75rem;
  transition: 0.2s;
  transform: rotate(-90deg);
}

details[open] > summary {
}

details[open] > summary::after {
  transform: rotate(0deg);
}

summary::-webkit-details-marker {
  display: none;
}

summary {
  color: #111;
  cursor: pointer;
}

details[open] summary {
}

details {
  border-radius: 5px;
}