* {
    margin: 0;
    padding: 0;
    cursor: default;
}
  
  html, body {
    height: 100%;
    max-width: 100%;
    scroll-behavior: smooth;
}
  
a {
    text-decoration: none;
    cursor: pointer;
}
  
body {
    overflow-x: hidden;
}
  
body a:hover {
    text-decoration: none;
}
  
::-webkit-scrollbar {
    overflow-x: hidden;
    display: none;
    visibility: hidden;
}

.animate {
  opacity: 0;
}


/* animation css */
@keyframes fade-down {
  from {
      transform: translateY(-75px);
      opacity: 0;
  }
  to {
      transform: translateY(0);
      opacity: 1;
      animation-fill-mode: forwards;
  }
}

@keyframes fade-up {
  from {
      transform: translateY(35px);
      opacity: 0;
  }
  to {
      transform: translateY(0);
      opacity: 1;
  }
}

@keyframes fade-right {
  from {
      transform: translateX(-75px);
      opacity: 0;
  }
  to {
      transform: translateX(0);
      opacity: 1;
  }
}

@keyframes fade-left {
  from {
      transform: translateX(75px);
      opacity: 0;
  }
  to {
      transform: translateX(0);
      opacity: 1;
  }

}

@keyframes zoom-in {
  from {
      transform: scale(0.5);
      opacity: 0;
  }
  to {
      transform: scale(1);
      opacity: 1;
  }
}

@keyframes fade-up-right {
  from {
      transform: translate(-60px, 60px);
      opacity: 0;
  }
  to {
      transform: translate(0, 0);
      opacity: 1;
  }
}

@keyframes fade-in {
from {
  opacity: 0;
  display: none;
}
to {
  opacity: 1;
  display: block;
}
}

@keyframes fade-out {
from {
  opacity: 1;
}
to {
  opacity: 0;
  display: none;
}
}


/* Bootstrap pre-sets */
.col-sm {
    padding: 0;
    margin: 0;
}

.row {
    padding: 0;
    margin: 0;
}


/* Navigation style */
nav {
    position: fixed;
    width: 100%;
    z-index: 98;
}

nav .logo {
    position: fixed;
    top: 3%;
    left: 3%;
}

nav .logo img {
    height: 2.6vh;
    cursor: pointer;
}

nav .opener {
    position: fixed;
    top: 3.5%;
    right: 3%;
}

nav .opener img {
    height: 2.1vh;
    cursor: pointer;
    transition: .2s ease-in-out;
}

nav .opener #green-hamburger {
    display: none;
}

nav .opener img:hover {
    opacity: 0.7;
}

.sidenav {
    height: 100%;
    width: 100%;
    position: fixed;
    z-index: 98;
    backdrop-filter: blur(4px);
    transition: all .4s;
    opacity: 0;
    visibility: hidden;
    background: rgb(18, 53, 36, 0.8);
}
  
.sidenav .closebtn {
    position: absolute;
    top: 3%;
    right: 3%;
    cursor: pointer;
    z-index: 97;
}
  
.closebtn img {
    color: white;
    height: 2.9vh;
    cursor: pointer;
}
  
.nav-content {
    position: relative;
    top: 50%;
    transform: translateY(-50%);
    width: 90%;
    margin-left: 5%;
    font-family: 'Urbanist', sans-serif;
}

.nav-content li {
    list-style: none;
    color: white;
    font-weight: 500;
    letter-spacing: 1px;
    font-size: 2.5em;
    padding: 2% 0 0 0;
    transition: all .2s;
}

.nav-content a {
    text-decoration: none;
    color: white;
    transition: .3s;
}

.nav-content li:hover {
    font-size: 2.55em;
    padding: 2% 0;
}


header {
    position: relative;
    height: 100%;
    z-index: 5;
}

header .col-sm {
    margin: 0;
}

header .left-side {
    background-color: #F8F8E3;
}

header .topic {
    position: relative;
    cursor: pointer;
}

header .topic-full {
    height: 100%;
}

header .topic-half {
    height: 50%;
}

header .teaching-select {
    background-color: #F8F8E3;
    color: #123524;
    z-index: 5;
}

header .education-select {
    background-color: #123524;
    color: white;
    z-index: 4;
}

header .competitions-select {
    background-color: #1B5237;
    color: white;
    z-index: 3;
}

header .topic h4 {
    font-family: 'Playfair Display', serif;
    position: absolute;
    width: 100%;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2em;
    letter-spacing: 0.05em;
    font-weight: 400;
    text-transform: uppercase;
    text-align: center;
    cursor: pointer;
}

header .topic h4 img {
    height: 1.1em;
    padding-bottom: 0.8%;
    opacity: 0;
    width: 0;
    cursor: pointer;
    transition: all .3s ease-out;
}

header .topic:hover > h4 img {
    opacity: 1;
    padding-left: 1%;
    width: auto;
}



.subject {
  position: absolute;
  top: 0;
  width: 100%;
  background-color: #123524;
  display: none;
  z-index: 96;
}

.subject .back-button {
  position: fixed;
  z-index: 98;
  top: 3%;
  left: 3%;
  transform: rotate(180deg);
  cursor: pointer;
}

.subject .back-button img {
  height: 1.8em;
  cursor: pointer;
}


/* teaching */
.teaching {
  position: absolute;
  padding-top: 5%;
}

.teaching .call-to-action {
  position: fixed;
  bottom: 0;
  right: 0;
  background-color: #267d53;
  width: 40%;
  padding: 0;
  margin: 0;
  overflow: hidden !important;
  z-index: 5;
}

.teaching .call-to-action .col {
  margin: 0;
  padding: 5% 7%;
  overflow: hidden;
  text-align: center;
  transition: .3s ease-out;
}

.teaching .call-to-action .col-left {
  border-right: solid 2.5px #123524;
}

.teaching .call-to-action .col-right {
  border-right: left 2.5px #123524;
}

.teaching .call-to-action .col:hover {
  background-color: #266546;
}

.teaching .call-to-action .col a {
  font-family: 'Urbanist', sans-serif;
  color: white;
  text-decoration: none;
  font-weight: 500;
}

.teaching .list-container {
  font-family: 'Urbanist', sans-serif;
  color: white;
  width: 80%;
  margin-left: 10%;
  padding-bottom: 5%;
}

.teaching .list-container h2 {
  font-family: 'Playfair Display', serif !important;
  font-size: 3em;
  letter-spacing: 0.05em;
  opacity: 0;
}

.teaching .list-container i  {
  font-family: 'Urbanist', sans-serif !important;
  font-size: 0.6em;
}

.teaching .list-container .hidden-not {
  display: none;
  font-family: 'Urbanist', sans-serif !important;
}

.teaching .list-container p {
  font-size: 1.2em;
  letter-spacing: 0.05em;
  text-align: justify;
  opacity: 0;
}

.teaching .lesson-content-alt .col-sm {
  position: relative;
}

.teaching .lesson-content-alt .left-side {
  padding: 10% 0;
  background-color: #F8F8E3;
}

.teaching .lesson-content-alt .right-side {
  overflow: hidden;
}

.teaching .lesson-content-alt .content-container {
  width: 70%;
  color: white;
}

.teaching .lesson-content-alt .first {
  margin-left: 20%;
}

.teaching .lesson-content-alt .second {
  background-image: url("https://hujason.com/imgs/DASH.jpg");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  z-index: 5;
  height: 100%;
  width: 100%;
}

.teaching .lesson-content-alt .display-none {
  background-image: url("https://hujason.com/imgs/DASH.jpg");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  z-index: 5;
  height: 100%;
  width: 100%;
  display: none;
}

.teaching .lesson-content-alt .content-container h4 {
  font-family: 'Playfair Display', serif;
  font-size: 2em;
  letter-spacing: 0.04em;
  color: #123524;
}

.teaching .lesson-content-alt .content-container p {
  font-family: 'Urbanist', sans-serif;
  font-size: 0.96em;
  line-height: 1.6em;
  letter-spacing: 0.09em;
  color: black;
}

.teaching .lesson-content-alt .content-container h5 {
  font-family: 'Urbanist', sans-serif;
  font-size: 1.4em;
  font-weight: 600;
  letter-spacing: 0.09em;
  color: #123524;
}

.teaching .lesson-content-alt .content-container ul {
  padding: 3%;
}

.teaching .lesson-content-alt .content-container li {
  font-family: 'Urbanist', sans-serif;
  font-size: 0.96em;
  line-height: 2em;
  font-weight: 600;
  letter-spacing: 0.09em;
  color: black;
  list-style: dotted;
  list-style-position: outside;
}

.teaching .goal {
  background-color:#fdfde8; /* #12432b */
  color: white;
  padding: 12% 0;
}

.teaching .goal .title-container {
  padding: 0 7%;
  text-align: center;
}

.teaching .goal .title-container h4 {
  font-family: 'Playfair Display', serif;
  font-size: 2em;
  letter-spacing: 0.04em;
  color: black;
}

.teaching .goal .title-container p {
  font-family: 'Urbanist', sans-serif;
  font-size: 1.15em;
  line-height: 1.6em;
  font-weight: 400;
  letter-spacing: 0.09em;
  color: black;
  width: 70%;
  margin-left: 15%;
}

.teaching .goal .row {
  margin-top: 3%;
}

.teaching .goal .content-container {
  background-color:#fdfde8; /* #F8F8E3 */
  box-shadow: 0 0 15px rgb(0, 0, 0, 0.07);
  width: 70%;
  height: 100%;
  padding: 8%;
  font-family: 'Urbanist', sans-serif;
}

.teaching .goal .content-container p {
  font-size: 0.96em;
  line-height: 1.6em;
  letter-spacing: 0.09em;
  color: black;
}

.teaching .goal .content-container b {
  font-size: 1em;
  line-height: 1.6em;
  letter-spacing: 0.09em;
  color: black;
}

.teaching .goal .container-1 {
  margin-left: 30%;
}

.teaching .goal .container-2 {
  margin-left: 15%;
}

.teaching .goal .container-3 {
  margin-left: 0;
}

.teaching .pricing {
  background-color: #123524;
}

.teaching .pricing .col-sm {
  position: relative;
  overflow: hidden;
}

.teaching .pricing .background-img {
  background-image: url("https://hujason.com/imgs/student-1.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  height: 100%;
  width: 100%;
  filter: grayscale(1);
}

.teaching .pricing .content-container {
  padding: 20% 0 20% 10%;
  width: 80%;
}

.teaching .pricing .content-container h4 {
  font-family: 'Playfair Display', serif;
  font-size: 2em;
  letter-spacing: 0.04em;
  color: white;
}

.teaching .pricing .content-container p {
  font-family: 'Urbanist', sans-serif;
  font-size: 0.96em;
  line-height: 1.6em;
  letter-spacing: 0.09em;
  color: white;
}

.teaching .pricing .packages-container {
  margin-top: 5%;
}

.teaching .pricing .packages {
  background-color: #12432b;
  box-shadow: 0 0 15px rgba( 0, 0, 0, 0.1);
  margin-top: 5%;
}

.teaching .pricing .package-title-container {
  background-color: #1B5237;
  padding: 5%;
}

.teaching .pricing .packages h5 {
  font-family: 'Urbanist', sans-serif;
  color: white;
  font-size: 1.3em;
  letter-spacing: 0.01em;
  font-weight: 700;
}

.teaching .pricing .packages b {
  font-family: 'Urbanist', sans-serif;
  color: white;
  font-size: 1em;
  font-weight: 600;
}

.teaching .pricing .packages ul {
  font-family: 'Urbanist', sans-serif;
  color: white;
  padding: 5%;
  margin-left: 3%;
}

.teaching .pricing .packages li {
  font-size: 1em;
  line-height: 2em;
  letter-spacing: 0.09em;
}



/* education */
.education {
  position: absolute;
  padding-top: 5%;
}

.education .list-container {
  font-family: 'Urbanist', sans-serif;
  color: white;
  width: 80%;
  margin-left: 10%;
  padding-bottom: 5%;
}

.education .list-container h2 {
  font-family: 'Playfair Display', serif;
  font-size: 3em;
  letter-spacing: 0.05em;
  opacity: 0;
}

.education .list-container p {
  font-size: 1.2em;
  letter-spacing: 0.05em;
  text-align: justify;
  opacity: 0;
}

.education .left-side {
  position: relative;
  overflow: hidden;
}

.education .beginning img {
  width: 40vw;
  filter: grayscale(1);
  opacity: 0;
}

.education .beginning .left-side .background-img {
  background-image: url("https://hujason.com/imgs/competitions-2.jpg");
  background-position: left;
  background-repeat: no-repeat;
  background-size: cover;
  height: 100%;
  width: 100%;
  filter: grayscale(1);
}

.education .right-side {
  position: relative;
  padding: 10% 0;
  background-color: #F8F8E3;
}

.education .beginning .right-side .display-display {
  display: block;
}

.education .beginning .right-side .display-none {
  display: none;
}

.education .beginning .right-side .content-container {
  width: 80%;
  margin-left: 5%;
  color: black;
}

.education .beginning .right-side .content-container h4 {
  font-family: 'Playfair Display', serif;
  font-size: 2em;
  font-weight: lighter;
  letter-spacing: 0.04em;
  color: #123524;
}

.education .beginning .right-side .content-container h5 {
  font-family: 'Urbanist', sans-serif;
  font-size: 1.1em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-bottom: 3%;
  color: black;
}

.education .beginning .right-side .content-container p {
  font-family: 'Urbanist', sans-serif;
  font-size: 0.96em;
  line-height: 1.6em;
  letter-spacing: 0.09em;
  color: black;
  text-align: justify;
}

.education .beginning .right-side .content-container .animate {
  opacity: 0;
}

.education .now {
  padding: 5% 0;
  margin: 0;
}

.education .now .img-container {
  padding: 0;
  text-align: center;
}

.education .now .img-container img {
  width: 80vw;
  filter: grayscale(1);
}

.education .videos-alt {
  background-color:#12432b;
  padding: 10% 25%;
  text-align: center;
}

.education .videos-alt h5 {
  font-family: 'Playfair Display', serif;
  font-size: 2em;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-bottom: 3%;
  color: white;
  padding: 0 20%;
}

.education .videos-alt p {
  font-family: 'Urbanist', sans-serif;
  font-size: 0.96em;
  line-height: 1.6em;
  letter-spacing: 0.09em;
  color: white;
  text-align: justify;
}

.education .videos-alt b {
  font-family: 'Urbanist', sans-serif;
  font-size: 1.1em;
  line-height: 2.5em;
  letter-spacing: 0.09em;
  color: white;
  text-align: justify;
  text-transform: uppercase;
}

.education .videos-alt ul {
  padding-bottom: 10%;
}

.education .videos-alt li {
  font-family: 'Urbanist', sans-serif;
  font-size: 1.1em;
  line-height: 1.6em;
  letter-spacing: 0.09em;
  color: white;
  text-align: justify;
}

.education .videos-alt a {
  font-family: 'Urbanist', sans-serif;
  font-size: 1.1em;
  font-weight: 600;
  letter-spacing: 0.09em;
  color: white;
  text-align: justify;
  border: solid 3px;
  padding: 4% 6%;
  transition: 0.3 all;
}

.education .videos-alt a:hover {
  background-color: white;
  color: #123524;
}



/* competitions */
.competitions {
  position: absolute;
} 

  .competitions .back-button {
    position: fixed;
    z-index: 98;
    top: 3%;
    left: 3%;
    transform: rotate(180deg);
    cursor: pointer;
  }

  .competitions .back-button img {
    height: 1.8em;
    cursor: pointer;
  }

  .competition-select {
    color: white;
    cursor: pointer;
  }

  .competition-content {
    color: white;
    height: 0;
    visibility: hidden;
  }

  .competitions .list {
    font-family: 'Urbanist', sans-serif;
    padding: 5% 10%;
  }


  .list-container {
    font-family: 'Urbanist', sans-serif;
    color: white;
    margin-top: 5%;
  }

  .list-container h2 {
    font-family: 'Playfair Display', serif;
    font-size: 3em;
    letter-spacing: 0.05em;
  }

  .list-container p {
    font-size: 1.2em;
    letter-spacing: 0.05em;
    text-align: justify;
  }

  .event-list-container {
    margin-top: 5%;
    padding-bottom: 10%;
  }
  
  .event-list-container h2 {
    padding: 2% 0 2% 0;
    font-size: 1.5em;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: white;
  }

  .clearfix:after {
    visibility: hidden;
    display: block;
    font-size: 0;
    content: " ";
    clear: both;
    height: 0;
  }
  
  .dropdown-container {
    max-width: 100%;
    border-bottom: solid 2px white;
    background-color: #1B5237;
    color: white;
    overflow: hidden;
  }
  
  .dropdown-container header {
    cursor: pointer;
    font-size: 0.75rem;
    padding: 1rem;
    background-color: #1B5237;
    color: white;
    transition: background-color 300ms ease-out;
  }

  .dropdown-container header:hover {
    background-color: #12432b;
  }
  
  .dropdown-container.open header {
    background-color: #12432b;
  }
  
  .dropdown-container h3 {
    float: left;
    font-size: 1.7em;
    letter-spacing: 0.1em;
    font-weight: 500;
    padding: 0;
    margin: 0;
    cursor: pointer;
  }

  .dropdown-container i {
    color: white;
    cursor: pointer;
    font-weight: 700;
  }
  
  .dropdown-container .expand {
    float: right;
    cursor: pointer;
    transform: rotate(45deg);
    font-size: 1.8em;
    transition: transform 350ms ease-in-out;
  }
  
  .dropdown-container.open .expand {
    transform: rotate(0);
  }
  
  .dropdown-container article {
    max-height: 0px;
    overflow: hidden;
    line-height: 1.6; 
    transition: max-height 300ms ease-out;
  }
  
  /* padding can't be on article element because it won't collapse properly, add wrapper around contents */
  .dropdown-container .article-inner {
    padding: 1rem;
  }

  .list .article-inner p {
    font-size: 1.1em;
    letter-spacing: 0.04em;
    font-weight: 300;
}