@import url('https://fonts.googleapis.com/css?family=Comfortaa|Nunito|Kosugi+Maru|Noto+Serif+JP|Sarabun|Noto+Sans+JP');
@import url('https://fonts.googleapis.com/css2?family=Aoboshi+One&family=BIZ+UDPMincho&family=Cherry+Bomb+One&family=Chokokutai&family=Darumadrop+One&family=M+PLUS+1+Code:wght@100..700&family=M+PLUS+Rounded+1c&family=Nanum+Gothic&family=Rampart+One&Sawarabi+Gothic&family=Sawarabi+Mincho&family=Shippori+Antique+B1&family=Shizuru&family=Yuji+Hentaigana+Akari&family=Yuji+Hentaigana+Akebono&family=Yuji+Mai&family=Zen+Old+Mincho&display=swap');

:root {
  --main-text-color: black;
  --main-green-color: #6CC088;
  --desktop-nav-width: 300;
  --theme-bg_1: radial-gradient(ellipse at top left, var(--theme-red) 0%, var(--theme-yellow) 40%, var(--theme-green) 70%);
}

body {
  color: var(--main-text-color);
  font-family: "Comfortaa", "Nunito", "Sarabun", sans-serif;
  margin: 0 auto;
  scroll-behavior: smooth;
/*  scrollbar-width: none;*/
  overflow-x: hidden;
}

body::-webkit-scrollbar {
  width: 0 !important;
}

body::-moz-scrollbar {
  width: 0 !important;
}

body::-o-scrollbar {
  width: 0 !important;
}

body::scrollbar {
  width: 0 !important;
}

input:focus {
  outline: none;
}

.landing-background {
  position: absolute;
  background: var(--theme-bg_1);
  clip-path: polygon(0 0, 100% 0, 100% 40%, 0 100%);;
  width: 100vw;
  height: 600px;
  z-index: 1;
}

.hito {
  display: none;
}

.navigation-bar {
  position: fixed;
  display: none;
  opacity: 0;
  background: black;
  margin: 0 auto;
  color: white;
  width: 100vw;
  height: 50px;
  text-align: center;
  transform: scale(1.0);
  transition: 0.5s ease;
  z-index: 100;
}

/*#nav-btn {
  position: absolute;
  display: none;
  margin: 0 auto;
  width: 30px;
  margin-left: 0px;
  margin-right: 0px;
  right: 25px;
  top: 8px;
  z-index: 101;
  cursor: pointer;
}*/

.bar {
  position: relative;
  display: block;
  margin: 0 auto;
  background: black;
  height: 2px;
  width: 25px;
  border-radius: 3px;
  margin-top: 5px;
  margin-bottom: 7px;
  transition: 0.5s;
}

.bar-app {
  position: relative;
  display: block;
  margin: 0 auto;
  background: white;
  height: 2px;
  width: 25px;
  border-radius: 3px;
  margin-top: 5px;
  margin-bottom: 7px;
  transition: 0.5s;
}

.opening-content {
  position: relative;
  top: calc(50vh - 200px);
  transition: 0.5s ease;
}

.opening-logo-wrapper {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 100px;
  height: 100px;
  background-color: black;
  border-radius: 50%;
  border: 3px solid black;
  opacity: 0;
  transition: background-color 0.25s ease;
  filter: invert(0);
  transform: scale(1.2);
  animation: 1.5s ease 0.5s 1 forwards pulse;
  z-index: 100;
  cursor: pointer;
}

.opening-logo {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 70px;
  top: 10px;
  transition: filter 0.25s ease;
  filter: invert(0);
}

.opening-logo-wrapper:hover {
  background-color: white;
}

.opening-logo-wrapper:hover .opening-logo {
  filter: invert(1);
}

@keyframes pulse {
  0% {
    opacity: 0;
    transform: scale(1.2);
  }

  30% {
    opacity: 1;
    transform: scale(0.95);
  }

  100% {
    opacity: 1;
    transform: scale(1.0);
  }
}

.logo-ring {
  position: fixed;
  margin: 0 auto;
  top: calc(50vh - 200px);
  left: 0px;
  right: 0px;
  width: 100px;
  height: 100px;
  background: none;
  border-radius: 50%;
  border: 1px solid black;
  opacity: 0;
  z-index: 99;
  animation: 1s ease 0.5s forwards pulse_ring;
}

@keyframes pulse_ring {
  0% {
    transform: scale(1.0);
    opacity: 0;
  }

  40% {
    opacity: 1;
  }

  95% {
    transform: scale(1.75);
    opacity: 0;
  }

  100% {
    transform: scale(1.0);
    opacity: 0;
  }
}

.opening-title {
  font-size: 60px;
  opacity: 0;
  position: relative;
  top: 83px;
  display: block;
  margin: 0 auto;
  text-align: center;
  transition: 0.75s ease opacity
              0.75s ease transform;
  letter-spacing: 15px;
  transform: translate(0px, -20px);
}

@keyframes show_title {
  0% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}

.canvas-wrapper {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 700px;
  height: 400px;
  top: 100px;
  opacity: 0;
  transform: translate(0px, -20px);
  animation: 1s ease 1.5s 1 forwards show_canvas;
}

@keyframes show_canvas {
  0% {
    transform: translate(0px, -20px);
    opacity: 0;
  }

  100% {
    transform: translate(0px, 0px);
    opacity: 1;
  }
}

canvas {
  opacity: 1;
  transition: 1s ease opacity;
}

.niheigo {
  color: white;
  position: relative;
  z-index: 100;
  margin-top: 0px;
  margin-bottom: 0px;
  padding: 8px;
  text-align: center;
  font-size: 20px;
  font-weight: 100;
  cursor: pointer;
  top: -13px;
}

.niheigo-logo {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 30px;
}

#desktop-nav-menu {
  position: fixed;
  left: 0px;
  right: 0px;
  margin: 0 auto;
  display: none;
  width: 300px;
  top: 100px;
  transition: 0.5s ease;
}

.desktop-nav-list {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 100%;
  padding-bottom: 4px;
  list-style-type: none;
  padding-left: 0px;
}

.desktop-nav-list li:nth-child(1) {
  top: -50px;
}

.desktop-nav-list li:nth-child(3) {
  top: -50px;
}

.desktop-nav-item {
  position: relative;
  display: inline-block;
  width: 32%;
  text-align: center;
  cursor: pointer;
}

.desktop-nav-text {
  position: relative;
  display: block;
  margin: 0 auto;
  background: white;
  color: black;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 18px;
  display: grid;
  align-content: center;
  border: 1px solid rgba(0, 0, 0, 1);
  transition: 0.5s ease;
  box-shadow: 0px 10px 10px rgba(255, 255, 255, 1);
}

.desktop-nav-text:hover {
  background: black;
  color: white;
}

#mobile-nav-menu {
  position: absolute;
  display: none;
  top: 0%;
  left: 0%;
  width: 100%;
  height: 0px;
  background: black;
  transition: 0.5s ease;
  z-index: 150;
}

.mobile-nav-list {
  position: relative;
  display: block;
  margin: 0 auto;
  z-index: 100;
  width: 90%;
  padding-bottom: 4px;
  padding-left: 20px;
  top: 100px;
}

.mobile-nav-item {
  display: block;
  list-style-type: none;
  height: 90px;
  width: 90%;
  color: white;
  padding: 0px 0px 0px 0px;
  float: left;
  text-align: left;
  cursor: pointer;
}

.mobile-nav-text {
  position: relative;
  font-size: 22px;
  padding: 0px 0px 30px 0px;
  border-bottom: 1px solid white;
  color: white;
  letter-spacing: 2px;
  margin-top: 0px;
}

.start-btn {
  position: relative;
  display: block;
  margin: 0 auto;
  top: 10px;
  border: 4px solid black;
  border-radius: 6px;
  background: none;
  margin-top: 10px;
  padding: 10px;
  font-size: 24px;
  font-weight: 300;
  color: black;
  opacity: 0;
  width: 210px;
  cursor: pointer;
  animation: appear 1s ease-out 3.5s forwards;
}

.topic-container {
  position: relative;
  top: 150px;
  display: none;
  opacity: 0;
  transition: 0.5s;
}

.home-content {
  top: 150px;
}

.inner-content {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 100%;
  top: 0px;
}

.content-title {
  position: relative;
  display: block;
  margin: 0 auto;
  text-align: center;
  font-size: 30px;
}

.content-para {
  position: relative;
  display: block;
  text-align: left;
  width: calc(100% - 40px);
  font-size: 28px;
  margin-top: 0px;
  line-height: 60px;
  letter-spacing: 1px;
}

.test-form {
  position: fixed;
  display: none;
  margin: 0 auto;
  left: 0px;
  right: 0px;
  top: 100px;
  width: 400px;
  padding: 20px;
  background: white;
  box-shadow: 0px 0px 10px grey;
  border-radius: 10px;
}

.kanji-slide-num {
  display: none;
}

.fx-audio {
  display: none;
}