:root {
  --left-nav-width: 250px;
}

/*
* NAV START
*/

.top-nav {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  z-index: 5;
  font-size: 1.5rem;
  text-shadow: 5px 5px 10px #0008;
}


.top-nav>ul {
  max-width: 700px;
  padding: 0;
  list-style: none;
  margin: 0;
  display: flex;
  margin: 20px auto;
  width: calc(100% - 40px);
  height: 100%;
  justify-content: space-between;
  align-items: center;
}

/* VIDEO/TEXT TOGGLE*/

.text-video-toggle {

  width: fit-content;
  z-index: 5;
  display: flex;
  justify-content: center;
  align-items: center;
  outline: 2px solid var(--text-col);
  border-radius: 2rem;
}

.text-video-toggle>span {

  display: block;
  font-size: 1rem;
  padding: 0.3rem 0.8rem;
  background: var(--bg-col);
  color: var(--text-col);
}

.text-video-toggle:hover {
  cursor: pointer;
  /*Glow*/
  box-shadow: 0 0 10px 0 var(--text-col);
}

.text-video-toggle>span:first-child {
  border-radius: 2rem 0 0 2rem;
}

.text-video-toggle>span:last-child {
  border-radius: 0 2rem 2rem 0;
}

.text-video-toggle>.selected {
  background: var(--text-col);
  color: var(--bg-col);
}

/*
* LEFT NAV START
*/
.left-nav {
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0rem;
  top: 0;
  height: 100%;
  padding: 0 1rem;
  width: var(--left-nav-width);
  z-index: 5;
  box-sizing: border-box;
}
.left-nav>a {
  display: block;
  background: none;
  padding: 0.7rem 0;
  width: 100%;
  text-decoration: none;
  color: var(--text-col);
  text-align: center;
  border-radius: 3rem;
  margin: 0.5rem 0;
  transition: 150ms all ease-in-out;
}
.left-nav>a:hover {
  background: var(--border-outline);
}

.left-nav>button {
  border: none;
  background: none;
  padding: 0;
  margin: 1rem auto;
}

.left-nav>ol {
  margin: 0;
  padding: 0;
  display: flex;
  list-style: none;
  flex-direction: column;
  overflow-y: auto;
    scroll-behavior: smooth;
  overscroll-behavior:contain;
  scrollbar-width: thin;
  flex-grow: 1;
  scrollbar-color: transparent transparent;
  padding-bottom: 20px;
}
.left-nav>ol:hover {
  scrollbar-color: var(--text-col, #888) transparent;
}

.left-nav>ol>li {
  position: relative;
  padding: 0.7rem 0;
  padding-left: 2rem;
  transition: 150ms all ease-in-out;
  cursor: pointer;
  position: relative;
  border: 1px solid var(--panel-outline);
  margin: 0.2rem;
  border-radius: 0.5rem;
}
.left-nav>ol>li:hover {

  background: var(--overlay-col);
}

.left-nav>ol>li::before {
  content: "01";
  position: absolute;
  left: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-col);
  opacity: 0.5;
}

.left-nav>ol>li:nth-child(2)::before {
  content: "02";
}

.left-nav>ol>li:nth-child(3)::before {
  content: "03";
}

.left-nav>ol>li:nth-child(4)::before {
  content: "04";
}

.left-nav>ol>li:nth-child(5)::before {
  content: "05";
}

.left-nav>ol>li:nth-child(6)::before {
  content: "06";
}

.left-nav>ol>li:nth-child(7)::before {
  content: "07";
}

.left-nav>ol>li:nth-child(8)::before {
  content: "08";
}

.left-nav>ol>li:nth-child(9)::before {
  content: "09";
}

.left-nav>ol>li:nth-child(10)::before {
  content: "10";
}

.left-nav>ol>li:nth-child(11)::before {
  content: "11";
}

.left-nav>ol>li:nth-child(12)::before {
  content: "12";
}

.left-nav>ol>li:nth-child(13)::before {
  content: "13";
}

.left-nav>ol>li:nth-child(14)::before {
  content: "14";
}

.left-nav>ol>li:nth-child(15)::before {
  content: "15";
}

.left-nav>ol>li:nth-child(16)::before {
  content: "16";
}

.left-nav>a:hover,
.left-nav>button:hover,
.left-nav>ul>li:hover {
  background: var(--panel-outline);
}

.left-nav>ul>li.active::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 1.5rem;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--accent-col);
}


@media only screen and (max-width : 800px) {
  .left-nav {
      display: none;
  }
  
  .section-listing {
    padding: 1rem !important;
  }
}

@media only screen and (min-width : 801px) {
  .top-nav {
      /*!  */
  }
  
  .top-nav>ul>li:not(.text-video-toggle) {
    opacity: 0;
    pointer-events: none;
  }
}

/*
* MAIN START
*/

body {
  font-family: "Charter", serif;
  padding: 0;
}

main {
  width: 100vw;
  height: 100vh;
  overflow: auto;
  padding: 20vh 0;
  box-sizing: border-box;
}

.section-listing {
--section-listing-max-width: 650px;
  position: relative;
  --left-padding-sl: max(var(--left-nav-width), calc((100vw - var(--section-listing-max-width)) / 2));
  padding-left: var(--left-padding-sl);
  /*! height: 100vh; */
  width: 100%;
  max-width: calc(var(--section-listing-max-width) + var(--left-padding-sl));
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-sizing: border-box;
}

.section-listing ul {
  padding: 0;
  list-style: none;
  padding: 0rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  padding-bottom: 100px;
}

.section-listing>h2 {
  margin: 0;
  text-align: center;
  font-size: 1.8rem;
  font-weight: 700;
}

.section-listing>h3 {
  margin: 0;
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: Uppercase;
  color: var(--text-col);
  opacity: 0.5;
}

.section-listing>p {
  font-size: 1.3rem;
}

.section-listing a {
  text-decoration: none;
  border-radius: 1rem;
}

.section-listing a:hover {
  display: block;
  background: var(--overlay-col);
}
.section-listing a:not(:last-child) > li{
  border-bottom: 1px solid var(--panel-outline);
}

main ul p {
  display: block;
  margin: 0;
}


main ul>a>li .fa-play,
main ul>a>li .fa-align-left {
  margin-right: 1rem;
  opacity: 0.5;
  font-size: 1rem;
}

.section-listing.no-vid .fa-play, 
a.text-version .fa-play {
  display: none;
}
div:not(.no-vid) a:not(.text-version) .fa-align-left {
display: none;
}

main li {

  display: flex;
  position: relative;
  align-items: center;
  font-size: 1.15rem;
  padding: 1rem;
  margin: 0 1rem;
  transition: 150ms all ease-in-out;
}

.seen-icon {
  position: absolute;
  right: 1vmin;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-col);
}

@media only screen and (max-device-width : 640px) {

  main li {
      padding: 0.8em;
      font-size: 1rem;
  }

  .section-listing>h2 {
      font-size: 1.5rem;
  }

  .section-listing>h3 {
      font-size: 1rem;
  }
}

main li:hover {

  padding-left: 1.5rem;
}

.btn {
  display: flex;
  flex-direction: column;
  margin: 1rem;
}

.sub-req {
  backdrop-filter: blur(2.5px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.sub-req a {

  backdrop-filter: blur(5px);
  font-size: 1.5rem;
  cursor: pointer;
}

.sub-req i {
  color: rgba(0, 0, 0, 0.5);
  font-size: 6rem;
  filter: drop-shadow(0 0 0.75rem crimson);
}

.sub-req>a:hover+.sub-req>i {
  background-color: yellow;
}

.not-out-yet-wrapper {
  max-width: 450px;
  margin: 0 auto;
  margin-top: 1rem;
  border: #ff9944 3px solid;
  background: #ff990077;
  padding: 10px;
  border-radius: 15px;
}

.not-out-yet-wrapper h3 {
  margin: 0;
  font-weight: 500;
}

/*
* Chapter select start
*/

main.chapter-select .section-listing ul {
  display: none;
}

main.chapter-select .section-listing {
  height: fit-content;
  padding: 1rem 0;
  position: relative;
  border-bottom: 1px solid var(--panel-outline);
}

main.chapter-select .section-listing:hover {
  background: var(--panel-outline);
}

main.chapter-select {
  padding: 20vh 0;
}